diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp
@@ -34,11 +34,6 @@
 #define GEN_UNCOMPRESS_INSTR
 #include "RISCVGenCompressInstEmitter.inc"
 
-static cl::opt<bool>
-    NoAliases("riscv-no-aliases",
-              cl::desc("Disable the emission of assembler pseudo instructions"),
-              cl::init(false), cl::Hidden);
-
 // Print architectural register names rather than the ABI names (such as x2
 // instead of sp).
 // TODO: Make RISCVInstPrinter::getRegisterName non-static so that this can a
@@ -69,11 +64,11 @@
   bool Res = false;
   const MCInst *NewMI = MI;
   MCInst UncompressedMI;
-  if (PrintAliases && !NoAliases)
+  if (PrintAliases)
     Res = uncompressInst(UncompressedMI, *MI, MRI, STI);
   if (Res)
     NewMI = const_cast<MCInst *>(&UncompressedMI);
-  if (!PrintAliases || NoAliases || !printAliasInstr(NewMI, Address, STI, O))
+  if (!PrintAliases || !printAliasInstr(NewMI, Address, STI, O))
     printInstruction(NewMI, Address, STI, O);
   printAnnotation(O, Annot);
 }
diff --git a/llvm/test/CodeGen/RISCV/patchable-function-entry.ll b/llvm/test/CodeGen/RISCV/patchable-function-entry.ll
--- a/llvm/test/CodeGen/RISCV/patchable-function-entry.ll
+++ b/llvm/test/CodeGen/RISCV/patchable-function-entry.ll
@@ -1,8 +1,8 @@
 ;; Test the function attribute "patchable-function-entry".
-; RUN: llc -mtriple=riscv32 --riscv-no-aliases < %s | FileCheck %s --check-prefixes=CHECK,RV32,NORVC
-; RUN: llc -mtriple=riscv64 --riscv-no-aliases < %s | FileCheck %s --check-prefixes=CHECK,RV64,NORVC
-; RUN: llc -mtriple=riscv32 -mattr=+c --riscv-no-aliases < %s | FileCheck %s --check-prefixes=CHECK,RV32,RVC
-; RUN: llc -mtriple=riscv64 -mattr=+c --riscv-no-aliases < %s | FileCheck %s --check-prefixes=CHECK,RV64,RVC
+; RUN: llc -mtriple=riscv32 -M no-aliases < %s | FileCheck %s --check-prefixes=CHECK,RV32,NORVC
+; RUN: llc -mtriple=riscv64 -M no-aliases < %s | FileCheck %s --check-prefixes=CHECK,RV64,NORVC
+; RUN: llc -mtriple=riscv32 -mattr=+c -M no-aliases < %s | FileCheck %s --check-prefixes=CHECK,RV32,RVC
+; RUN: llc -mtriple=riscv64 -mattr=+c -M no-aliases < %s | FileCheck %s --check-prefixes=CHECK,RV64,RVC
 
 define void @f0() "patchable-function-entry"="0" {
 ; CHECK-LABEL: f0:
diff --git a/llvm/test/MC/RISCV/compress-cjal.s b/llvm/test/MC/RISCV/compress-cjal.s
--- a/llvm/test/MC/RISCV/compress-cjal.s
+++ b/llvm/test/MC/RISCV/compress-cjal.s
@@ -1,7 +1,7 @@
 # RUN: llvm-mc -triple riscv32 -mattr=+c -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK,CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv32 --mattr=+c -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIASOBJ %s
diff --git a/llvm/test/MC/RISCV/compress-debug-info.s b/llvm/test/MC/RISCV/compress-debug-info.s
--- a/llvm/test/MC/RISCV/compress-debug-info.s
+++ b/llvm/test/MC/RISCV/compress-debug-info.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc -triple riscv32 -mattr=+c %s -g -o - -riscv-no-aliases \
+# RUN: llvm-mc -triple riscv32 -mattr=+c -g -M no-aliases %s \
 # RUN:   | FileCheck %s -check-prefixes=COMPRESS,BOTH
-# RUN: llvm-mc -triple riscv32 %s -g -o - -riscv-no-aliases \
+# RUN: llvm-mc -triple riscv32 -g -M no-aliases %s \
 # RUN:   | FileCheck %s -check-prefixes=UNCOMPRESS,BOTH
 
 
diff --git a/llvm/test/MC/RISCV/compress-rv32b.s b/llvm/test/MC/RISCV/compress-rv32b.s
--- a/llvm/test/MC/RISCV/compress-rv32b.s
+++ b/llvm/test/MC/RISCV/compress-rv32b.s
@@ -1,7 +1,7 @@
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+experimental-zbproposedc -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK,CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+experimental-zbproposedc -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+experimental-zbproposedc -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv32 --mattr=+c,+experimental-zbproposedc -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
@@ -12,7 +12,7 @@
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+experimental-zbproposedc -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+experimental-zbproposedc -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+experimental-zbproposedc -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv64 --mattr=+c,+experimental-zbproposedc -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/compress-rv32d.s b/llvm/test/MC/RISCV/compress-rv32d.s
--- a/llvm/test/MC/RISCV/compress-rv32d.s
+++ b/llvm/test/MC/RISCV/compress-rv32d.s
@@ -1,7 +1,7 @@
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+d -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK,CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+d -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+d -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv32 --mattr=+c,+d -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
@@ -12,7 +12,7 @@
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+d -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+d -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+d -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv64 --mattr=+c,+d -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/compress-rv32f.s b/llvm/test/MC/RISCV/compress-rv32f.s
--- a/llvm/test/MC/RISCV/compress-rv32f.s
+++ b/llvm/test/MC/RISCV/compress-rv32f.s
@@ -1,7 +1,7 @@
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+f -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK,CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+f -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c,+f -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv32 --mattr=+c,+f -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/compress-rv32i.s b/llvm/test/MC/RISCV/compress-rv32i.s
--- a/llvm/test/MC/RISCV/compress-rv32i.s
+++ b/llvm/test/MC/RISCV/compress-rv32i.s
@@ -1,7 +1,7 @@
 # RUN: llvm-mc -triple riscv32 -mattr=+c -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK,CHECK-ALIAS,CHECK-ALIASASM %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST,CHECK-INSTASM %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST,CHECK-INSTASM %s
 # RUN: llvm-mc -triple riscv32 -mattr=+c -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv32 --mattr=+c -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS,CHECK-ALIASOBJ32 %s
@@ -12,7 +12,7 @@
 # RUN: llvm-mc -triple riscv64 -mattr=+c -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK-ALIAS,CHECK-ALIASASM %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK-INST,CHECK-INSTASM %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK-INST,CHECK-INSTASM %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv64 --mattr=+c -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS,CHECK-ALIASOBJ64 %s
diff --git a/llvm/test/MC/RISCV/compress-rv64b.s b/llvm/test/MC/RISCV/compress-rv64b.s
--- a/llvm/test/MC/RISCV/compress-rv64b.s
+++ b/llvm/test/MC/RISCV/compress-rv64b.s
@@ -1,7 +1,7 @@
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+experimental-zbproposedc,+experimental-b -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+experimental-zbproposedc,+experimental-b -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c,+experimental-zbproposedc,+experimental-b -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv64 --mattr=+c,+experimental-zbproposedc,+experimental-b -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/compress-rv64i.s b/llvm/test/MC/RISCV/compress-rv64i.s
--- a/llvm/test/MC/RISCV/compress-rv64i.s
+++ b/llvm/test/MC/RISCV/compress-rv64i.s
@@ -1,7 +1,7 @@
 # RUN: llvm-mc -triple riscv64 -mattr=+c -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
 # RUN: llvm-mc -triple riscv64 -mattr=+c -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv64 --mattr=+c -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/compressed-relocations.s b/llvm/test/MC/RISCV/compressed-relocations.s
--- a/llvm/test/MC/RISCV/compressed-relocations.s
+++ b/llvm/test/MC/RISCV/compressed-relocations.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc -triple riscv32 -mattr=+c -riscv-no-aliases < %s -show-encoding \
+# RUN: llvm-mc -triple riscv32 -mattr=+c -M no-aliases < %s -show-encoding \
 # RUN:     | FileCheck -check-prefix=INSTR -check-prefix=FIXUP %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=RELOC %s
diff --git a/llvm/test/MC/RISCV/debug-valid.s b/llvm/test/MC/RISCV/debug-valid.s
--- a/llvm/test/MC/RISCV/debug-valid.s
+++ b/llvm/test/MC/RISCV/debug-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-objdump -M no-aliases -d - \
diff --git a/llvm/test/MC/RISCV/deprecated-csr-names.s b/llvm/test/MC/RISCV/deprecated-csr-names.s
--- a/llvm/test/MC/RISCV/deprecated-csr-names.s
+++ b/llvm/test/MC/RISCV/deprecated-csr-names.s
@@ -1,10 +1,10 @@
-# RUN: llvm-mc -triple riscv32 -riscv-no-aliases -show-encoding %s \
+# RUN: llvm-mc -triple riscv32 -M no-aliases -show-encoding %s \
 # RUN:     | FileCheck -check-prefixes CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype obj -triple riscv32 %s \
 # RUN:     | llvm-objdump -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST-ALIAS %s
 
-# RUN: llvm-mc -triple riscv64 -riscv-no-aliases -show-encoding %s \
+# RUN: llvm-mc -triple riscv64 -M no-aliases -show-encoding %s \
 # RUN:     | FileCheck -check-prefixes CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype obj -triple riscv64 %s \
 # RUN:     | llvm-objdump -d - \
diff --git a/llvm/test/MC/RISCV/fixups.s b/llvm/test/MC/RISCV/fixups.s
--- a/llvm/test/MC/RISCV/fixups.s
+++ b/llvm/test/MC/RISCV/fixups.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc -triple riscv32 -riscv-no-aliases < %s -show-encoding \
+# RUN: llvm-mc -triple riscv32 -M no-aliases < %s -show-encoding \
 # RUN:     | FileCheck -check-prefix=CHECK-FIXUP %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-objdump -M no-aliases -d - \
diff --git a/llvm/test/MC/RISCV/machine-csr-names.s b/llvm/test/MC/RISCV/machine-csr-names.s
--- a/llvm/test/MC/RISCV/machine-csr-names.s
+++ b/llvm/test/MC/RISCV/machine-csr-names.s
@@ -1,10 +1,10 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-objdump -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST-ALIAS %s
 #
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
 # RUN:     | llvm-objdump -d - \
diff --git a/llvm/test/MC/RISCV/option-nopic.s b/llvm/test/MC/RISCV/option-nopic.s
--- a/llvm/test/MC/RISCV/option-nopic.s
+++ b/llvm/test/MC/RISCV/option-nopic.s
@@ -1,19 +1,19 @@
-# RUN: llvm-mc -triple riscv32 -mattr=-relax -riscv-no-aliases < %s \
+# RUN: llvm-mc -triple riscv32 -mattr=-relax -M no-aliases < %s \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
 
-# RUN: llvm-mc -triple riscv32 -mattr=-relax -riscv-no-aliases \
+# RUN: llvm-mc -triple riscv32 -mattr=-relax -M no-aliases \
 # RUN:     -position-independent < %s | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -position-independent < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
 
-# RUN: llvm-mc -triple riscv64 -mattr=-relax -riscv-no-aliases < %s \
+# RUN: llvm-mc -triple riscv64 -mattr=-relax -M no-aliases < %s \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
 
-# RUN: llvm-mc -triple riscv64 -mattr=-relax -riscv-no-aliases \
+# RUN: llvm-mc -triple riscv64 -mattr=-relax -M no-aliases \
 # RUN:     -position-independent < %s | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 -position-independent < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
diff --git a/llvm/test/MC/RISCV/option-pic.s b/llvm/test/MC/RISCV/option-pic.s
--- a/llvm/test/MC/RISCV/option-pic.s
+++ b/llvm/test/MC/RISCV/option-pic.s
@@ -1,19 +1,19 @@
-# RUN: llvm-mc -triple riscv32 -mattr=-relax -riscv-no-aliases < %s \
+# RUN: llvm-mc -triple riscv32 -mattr=-relax -M no-aliases < %s \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
 
-# RUN: llvm-mc -triple riscv32 -mattr=-relax -riscv-no-aliases \
+# RUN: llvm-mc -triple riscv32 -mattr=-relax -M no-aliases \
 # RUN:     -position-independent < %s | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -position-independent < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
 
-# RUN: llvm-mc -triple riscv64 -mattr=-relax -riscv-no-aliases < %s \
+# RUN: llvm-mc -triple riscv64 -mattr=-relax -M no-aliases < %s \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
 
-# RUN: llvm-mc -triple riscv64 -mattr=-relax -riscv-no-aliases \
+# RUN: llvm-mc -triple riscv64 -mattr=-relax -M no-aliases \
 # RUN:     -position-independent < %s | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 -position-independent < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
diff --git a/llvm/test/MC/RISCV/option-pushpop.s b/llvm/test/MC/RISCV/option-pushpop.s
--- a/llvm/test/MC/RISCV/option-pushpop.s
+++ b/llvm/test/MC/RISCV/option-pushpop.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc -triple riscv32 -mattr=-relax -riscv-no-aliases < %s \
+# RUN: llvm-mc -triple riscv32 -mattr=-relax -M no-aliases < %s \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
@@ -6,7 +6,7 @@
 # RUN:     | llvm-objdump  --triple=riscv32 --mattr=+c -d - \
 # RUN:     | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
 
-# RUN: llvm-mc -triple riscv64 -mattr=-relax -riscv-no-aliases < %s \
+# RUN: llvm-mc -triple riscv64 -mattr=-relax -M no-aliases < %s \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=CHECK-RELOC %s
diff --git a/llvm/test/MC/RISCV/option-rvc.s b/llvm/test/MC/RISCV/option-rvc.s
--- a/llvm/test/MC/RISCV/option-rvc.s
+++ b/llvm/test/MC/RISCV/option-rvc.s
@@ -1,7 +1,7 @@
 # RUN: llvm-mc -triple riscv32 -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK,CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv32 -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK,CHECK-INST %s
 # RUN: llvm-mc -triple riscv32 -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv32 --mattr=+c -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
@@ -12,7 +12,7 @@
 # RUN: llvm-mc -triple riscv64 -show-encoding < %s \
 # RUN:   | FileCheck -check-prefixes=CHECK-ALIAS %s
 # RUN: llvm-mc -triple riscv64 -show-encoding \
-# RUN:   -riscv-no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
+# RUN:   -M no-aliases < %s | FileCheck -check-prefixes=CHECK-INST %s
 # RUN: llvm-mc -triple riscv64 -filetype=obj < %s \
 # RUN:   | llvm-objdump  --triple=riscv64 --mattr=+c -d - \
 # RUN:   | FileCheck -check-prefixes=CHECK-BYTES,CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/priv-valid.s b/llvm/test/MC/RISCV/priv-valid.s
--- a/llvm/test/MC/RISCV/priv-valid.s
+++ b/llvm/test/MC/RISCV/priv-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-objdump -M no-aliases -d - \
diff --git a/llvm/test/MC/RISCV/relocations.s b/llvm/test/MC/RISCV/relocations.s
--- a/llvm/test/MC/RISCV/relocations.s
+++ b/llvm/test/MC/RISCV/relocations.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc -triple riscv32 -riscv-no-aliases < %s -show-encoding \
+# RUN: llvm-mc -triple riscv32 -M no-aliases < %s -show-encoding \
 # RUN:     | FileCheck -check-prefix=INSTR -check-prefix=FIXUP %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c < %s \
 # RUN:     | llvm-readobj -r - | FileCheck -check-prefix=RELOC %s
diff --git a/llvm/test/MC/RISCV/rv32-machine-csr-names.s b/llvm/test/MC/RISCV/rv32-machine-csr-names.s
--- a/llvm/test/MC/RISCV/rv32-machine-csr-names.s
+++ b/llvm/test/MC/RISCV/rv32-machine-csr-names.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-objdump -d - \
diff --git a/llvm/test/MC/RISCV/rv32-user-csr-names.s b/llvm/test/MC/RISCV/rv32-user-csr-names.s
--- a/llvm/test/MC/RISCV/rv32-user-csr-names.s
+++ b/llvm/test/MC/RISCV/rv32-user-csr-names.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-objdump -d - \
diff --git a/llvm/test/MC/RISCV/rv32a-valid.s b/llvm/test/MC/RISCV/rv32a-valid.s
--- a/llvm/test/MC/RISCV/rv32a-valid.s
+++ b/llvm/test/MC/RISCV/rv32a-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+a -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+a -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+a -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+a -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+a < %s \
 # RUN:     | llvm-objdump --mattr=+a -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32b-aliases-valid.s b/llvm/test/MC/RISCV/rv32b-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv32b-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv32b-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-b -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-b -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-S-OBJ-NOALIAS %s
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-b \
 # RUN:     | FileCheck -check-prefixes=CHECK-S-OBJ %s
diff --git a/llvm/test/MC/RISCV/rv32c-aliases-valid.s b/llvm/test/MC/RISCV/rv32c-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv32c-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv32c-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc -triple=riscv32 -mattr=+c -riscv-no-aliases < %s \
+# RUN: llvm-mc -triple=riscv32 -mattr=+c -M no-aliases < %s \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND,CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c < %s \
 # RUN:     | llvm-objdump -d -M no-aliases - \
diff --git a/llvm/test/MC/RISCV/rv32c-only-valid.s b/llvm/test/MC/RISCV/rv32c-only-valid.s
--- a/llvm/test/MC/RISCV/rv32c-only-valid.s
+++ b/llvm/test/MC/RISCV/rv32c-only-valid.s
@@ -1,17 +1,17 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c -M no-aliases -show-encoding \
 # RUN:     | FileCheck --check-prefix=CHECK-ASM %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+c < %s \
 # RUN:     | llvm-objdump --mattr=+c -M no-aliases -d -r - \
 # RUN:     | FileCheck --check-prefix=CHECK-OBJ %s
 #
 # RUN: not llvm-mc -triple riscv32 \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck --check-prefix=CHECK-NO-EXT %s
 # RUN: not llvm-mc -triple riscv64 -mattr=+c \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck --check-prefix=CHECK-NO-RV32 %s
 # RUN: not llvm-mc -triple riscv64 \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck --check-prefix=CHECK-NO-RV32-AND-EXT %s
 
 # CHECK-OBJ: c.jal 0x7fe
diff --git a/llvm/test/MC/RISCV/rv32c-valid.s b/llvm/test/MC/RISCV/rv32c-valid.s
--- a/llvm/test/MC/RISCV/rv32c-valid.s
+++ b/llvm/test/MC/RISCV/rv32c-valid.s
@@ -1,9 +1,9 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+c < %s \
 # RUN:     | llvm-objdump --mattr=+c -M no-aliases -d -r - \
 # RUN:     | FileCheck --check-prefixes=CHECK-OBJ,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+c -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+c -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+c < %s \
 # RUN:     | llvm-objdump --mattr=+c -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32d-valid.s b/llvm/test/MC/RISCV/rv32d-valid.s
--- a/llvm/test/MC/RISCV/rv32d-valid.s
+++ b/llvm/test/MC/RISCV/rv32d-valid.s
@@ -1,9 +1,9 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+d -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+d -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+d < %s \
 # RUN:     | llvm-objdump --mattr=+d -M no-aliases -d -r - \
 # RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+d -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+d -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+d < %s \
 # RUN:     | llvm-objdump --mattr=+d -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32dc-valid.s b/llvm/test/MC/RISCV/rv32dc-valid.s
--- a/llvm/test/MC/RISCV/rv32dc-valid.s
+++ b/llvm/test/MC/RISCV/rv32dc-valid.s
@@ -1,13 +1,13 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+d -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+d -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+c,+d < %s \
 # RUN:     | llvm-objdump --mattr=+c,+d -M no-aliases -d -r - \
 # RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
 #
 # RUN: not llvm-mc -triple riscv32 -mattr=+c \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-EXT-D %s
-# RUN: not llvm-mc -triple riscv32 -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN: not llvm-mc -triple riscv32 -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-EXT-DC %s
 
 # CHECK-ASM-AND-OBJ: c.fldsp  fs0, 504(sp)
diff --git a/llvm/test/MC/RISCV/rv32e-valid.s b/llvm/test/MC/RISCV/rv32e-valid.s
--- a/llvm/test/MC/RISCV/rv32e-valid.s
+++ b/llvm/test/MC/RISCV/rv32e-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -mattr=+e -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -mattr=+e -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+e < %s \
 # RUN:     | llvm-objdump -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32f-valid.s b/llvm/test/MC/RISCV/rv32f-valid.s
--- a/llvm/test/MC/RISCV/rv32f-valid.s
+++ b/llvm/test/MC/RISCV/rv32f-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+f -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+f -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+f -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+f -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+f < %s \
 # RUN:     | llvm-objdump --mattr=+f -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32fc-aliases-valid.s b/llvm/test/MC/RISCV/rv32fc-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv32fc-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv32fc-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+f -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+f -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c,+f < %s \
 # RUN:     | llvm-objdump --mattr=+c,+f -M no-aliases -d - \
diff --git a/llvm/test/MC/RISCV/rv32fc-valid.s b/llvm/test/MC/RISCV/rv32fc-valid.s
--- a/llvm/test/MC/RISCV/rv32fc-valid.s
+++ b/llvm/test/MC/RISCV/rv32fc-valid.s
@@ -1,17 +1,17 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+f -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+f -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+c,+f < %s \
 # RUN:     | llvm-objdump --mattr=+c,+f -M no-aliases -d -r - \
 # RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
 #
 # RUN: not llvm-mc -triple riscv32 -mattr=+c \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-EXT-F %s
 # RUN: not llvm-mc -triple riscv32 \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-EXT-FC %s
 # RUN: not llvm-mc -triple riscv64 -mattr=+c,+f \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-RV32 %s
 
 # FIXME: error messages for rv64fc are misleading
diff --git a/llvm/test/MC/RISCV/rv32i-aliases-invalid.s b/llvm/test/MC/RISCV/rv32i-aliases-invalid.s
--- a/llvm/test/MC/RISCV/rv32i-aliases-invalid.s
+++ b/llvm/test/MC/RISCV/rv32i-aliases-invalid.s
@@ -1,5 +1,5 @@
 # UNSUPPORTED: windows
-# RUN: not llvm-mc -triple=riscv32 -riscv-no-aliases < %s -o /dev/null 2>&1 | FileCheck %s
+# RUN: not llvm-mc -triple=riscv32 -M no-aliases < %s -o /dev/null 2>&1 | FileCheck %s
 # RUN: not llvm-mc -triple=riscv32 < %s -o /dev/null 2>&1 | FileCheck %s
 
 # TODO ld
diff --git a/llvm/test/MC/RISCV/rv32i-aliases-valid.s b/llvm/test/MC/RISCV/rv32i-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv32i-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv32i-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND,CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv32 \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND,CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/rv32i-valid.s b/llvm/test/MC/RISCV/rv32i-valid.s
--- a/llvm/test/MC/RISCV/rv32i-valid.s
+++ b/llvm/test/MC/RISCV/rv32i-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 < %s \
 # RUN:     | llvm-objdump -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32m-valid.s b/llvm/test/MC/RISCV/rv32m-valid.s
--- a/llvm/test/MC/RISCV/rv32m-valid.s
+++ b/llvm/test/MC/RISCV/rv32m-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+m -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+m -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+m -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+m -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+m < %s \
 # RUN:     | llvm-objdump --mattr=+m -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32zbb-valid.s b/llvm/test/MC/RISCV/rv32zbb-valid.s
--- a/llvm/test/MC/RISCV/rv32zbb-valid.s
+++ b/llvm/test/MC/RISCV/rv32zbb-valid.s
@@ -11,9 +11,9 @@
 # RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
 
 # With Bitmanip base extension:
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zbb -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zbb -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zbb -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zbb -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+experimental-zbb < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-zbb -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32zbbp-only-valid.s b/llvm/test/MC/RISCV/rv32zbbp-only-valid.s
--- a/llvm/test/MC/RISCV/rv32zbbp-only-valid.s
+++ b/llvm/test/MC/RISCV/rv32zbbp-only-valid.s
@@ -6,7 +6,7 @@
 # RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
 
 # With Bitmanip base extension:
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zbb -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zbb -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+experimental-zbb < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-zbb -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32zbproposedc-valid.s b/llvm/test/MC/RISCV/rv32zbproposedc-valid.s
--- a/llvm/test/MC/RISCV/rv32zbproposedc-valid.s
+++ b/llvm/test/MC/RISCV/rv32zbproposedc-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+experimental-zbproposedc -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+experimental-zbproposedc -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+c,+experimental-zbproposedc,+experimental-b -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+c,+experimental-zbproposedc,+experimental-b -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+c,+experimental-zbproposedc < %s \
 # RUN:     | llvm-objdump --mattr=+c,+experimental-zbproposedc -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv32zfh-valid.s b/llvm/test/MC/RISCV/rv32zfh-valid.s
--- a/llvm/test/MC/RISCV/rv32zfh-valid.s
+++ b/llvm/test/MC/RISCV/rv32zfh-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zfh -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zfh -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zfh -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zfh -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+experimental-zfh < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-zfh -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64-machine-csr-names.s b/llvm/test/MC/RISCV/rv64-machine-csr-names.s
--- a/llvm/test/MC/RISCV/rv64-machine-csr-names.s
+++ b/llvm/test/MC/RISCV/rv64-machine-csr-names.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
 # RUN:     | llvm-objdump -d - \
diff --git a/llvm/test/MC/RISCV/rv64-user-csr-names.s b/llvm/test/MC/RISCV/rv64-user-csr-names.s
--- a/llvm/test/MC/RISCV/rv64-user-csr-names.s
+++ b/llvm/test/MC/RISCV/rv64-user-csr-names.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
 # RUN:     | llvm-objdump -d - \
diff --git a/llvm/test/MC/RISCV/rv64a-aliases-valid.s b/llvm/test/MC/RISCV/rv64a-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv64a-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv64a-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+a -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+a -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv64 -mattr=+a \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/rv64a-valid.s b/llvm/test/MC/RISCV/rv64a-valid.s
--- a/llvm/test/MC/RISCV/rv64a-valid.s
+++ b/llvm/test/MC/RISCV/rv64a-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+a -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+a -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+a < %s \
 # RUN:     | llvm-objdump --mattr=+a -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64b-aliases-valid.s b/llvm/test/MC/RISCV/rv64b-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv64b-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv64b-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-b -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-b -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-S-OBJ-NOALIAS %s
 # RUN: llvm-mc %s  -triple=riscv64 -mattr=+experimental-b \
 # RUN:     | FileCheck -check-prefixes=CHECK-S-OBJ %s
diff --git a/llvm/test/MC/RISCV/rv64c-aliases-valid.s b/llvm/test/MC/RISCV/rv64c-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv64c-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv64c-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc -triple=riscv64 -mattr=+c -riscv-no-aliases < %s \
+# RUN: llvm-mc -triple=riscv64 -mattr=+c -M no-aliases < %s \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND,CHECK-INST %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 -mattr=+c < %s \
 # RUN:     | llvm-objdump -d -M no-aliases - \
diff --git a/llvm/test/MC/RISCV/rv64c-hints-valid.s b/llvm/test/MC/RISCV/rv64c-hints-valid.s
--- a/llvm/test/MC/RISCV/rv64c-hints-valid.s
+++ b/llvm/test/MC/RISCV/rv64c-hints-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple riscv64 -mattr=+c -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple riscv64 -mattr=+c -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+c < %s \
 # RUN:     | llvm-objdump -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64c-valid.s b/llvm/test/MC/RISCV/rv64c-valid.s
--- a/llvm/test/MC/RISCV/rv64c-valid.s
+++ b/llvm/test/MC/RISCV/rv64c-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+c -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+c -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+c < %s \
 # RUN:     | llvm-objdump --mattr=+c -M no-aliases -d -r - \
@@ -6,10 +6,10 @@
 #
 #
 # RUN: not llvm-mc -triple riscv64 \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-EXT %s
 # RUN: not llvm-mc -triple riscv32 -mattr=+c \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-RV64 %s
 
 # TODO: more exhaustive testing of immediate encoding.
diff --git a/llvm/test/MC/RISCV/rv64d-aliases-valid.s b/llvm/test/MC/RISCV/rv64d-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv64d-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv64d-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+d -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+d -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv64 -mattr=+d \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/rv64d-valid.s b/llvm/test/MC/RISCV/rv64d-valid.s
--- a/llvm/test/MC/RISCV/rv64d-valid.s
+++ b/llvm/test/MC/RISCV/rv64d-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+d -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+d -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+d < %s \
 # RUN:     | llvm-objdump --mattr=+d -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64dc-valid.s b/llvm/test/MC/RISCV/rv64dc-valid.s
--- a/llvm/test/MC/RISCV/rv64dc-valid.s
+++ b/llvm/test/MC/RISCV/rv64dc-valid.s
@@ -1,13 +1,13 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+c,+d -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+c,+d -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+c,+d < %s \
 # RUN:     | llvm-objdump --mattr=+c,+d -M no-aliases -d -r - \
 # RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
 #
 # RUN: not llvm-mc -triple riscv64 -mattr=+c \
-# RUN:     -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN:     -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-EXT-D %s
-# RUN: not llvm-mc -triple riscv64 -riscv-no-aliases -show-encoding < %s 2>&1 \
+# RUN: not llvm-mc -triple riscv64 -M no-aliases -show-encoding < %s 2>&1 \
 # RUN:     | FileCheck -check-prefixes=CHECK-NO-EXT-DC %s
 
 # CHECK-ASM-AND-OBJ: c.fldsp  fs0, 504(sp)
diff --git a/llvm/test/MC/RISCV/rv64f-aliases-valid.s b/llvm/test/MC/RISCV/rv64f-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv64f-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv64f-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+f -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+f -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv64 -mattr=+f \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/rv64f-valid.s b/llvm/test/MC/RISCV/rv64f-valid.s
--- a/llvm/test/MC/RISCV/rv64f-valid.s
+++ b/llvm/test/MC/RISCV/rv64f-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+f -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+f -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+f < %s \
 # RUN:     | llvm-objdump --mattr=+f -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64i-aliases-invalid.s b/llvm/test/MC/RISCV/rv64i-aliases-invalid.s
--- a/llvm/test/MC/RISCV/rv64i-aliases-invalid.s
+++ b/llvm/test/MC/RISCV/rv64i-aliases-invalid.s
@@ -1,5 +1,5 @@
 # UNSUPPORTED: windows
-# RUN: not llvm-mc -triple=riscv64 -riscv-no-aliases < %s -o /dev/null 2>&1 | FileCheck %s
+# RUN: not llvm-mc -triple=riscv64 -M no-aliases < %s -o /dev/null 2>&1 | FileCheck %s
 # RUN: not llvm-mc -triple=riscv64 < %s 2>&1 -o /dev/null | FileCheck %s
 
 li t5, 0x10000000000000000 # CHECK: :[[@LINE]]:8: error: unknown operand
diff --git a/llvm/test/MC/RISCV/rv64i-aliases-valid.s b/llvm/test/MC/RISCV/rv64i-aliases-valid.s
--- a/llvm/test/MC/RISCV/rv64i-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rv64i-aliases-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND,CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv64 \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND,CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/rv64i-valid.s b/llvm/test/MC/RISCV/rv64i-valid.s
--- a/llvm/test/MC/RISCV/rv64i-valid.s
+++ b/llvm/test/MC/RISCV/rv64i-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 < %s \
 # RUN:     | llvm-objdump -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64m-valid.s b/llvm/test/MC/RISCV/rv64m-valid.s
--- a/llvm/test/MC/RISCV/rv64m-valid.s
+++ b/llvm/test/MC/RISCV/rv64m-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+m -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+m -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+m < %s \
 # RUN:     | llvm-objdump --mattr=+m -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64zbb-valid.s b/llvm/test/MC/RISCV/rv64zbb-valid.s
--- a/llvm/test/MC/RISCV/rv64zbb-valid.s
+++ b/llvm/test/MC/RISCV/rv64zbb-valid.s
@@ -6,7 +6,7 @@
 # RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
 
 # With Bitmanip base extension:
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zbb -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zbb -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+experimental-zbb < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-zbb -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64zbproposedc-valid.s b/llvm/test/MC/RISCV/rv64zbproposedc-valid.s
--- a/llvm/test/MC/RISCV/rv64zbproposedc-valid.s
+++ b/llvm/test/MC/RISCV/rv64zbproposedc-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+c,+experimental-zbproposedc,+experimental-b -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+c,+experimental-zbproposedc,+experimental-b -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+c,+experimental-zbproposedc,+experimental-b < %s \
 # RUN:     | llvm-objdump --mattr=+c,+experimental-zbproposedc,+experimental-b -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rv64zfh-valid.s b/llvm/test/MC/RISCV/rv64zfh-valid.s
--- a/llvm/test/MC/RISCV/rv64zfh-valid.s
+++ b/llvm/test/MC/RISCV/rv64zfh-valid.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zfh -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zfh -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+experimental-zfh < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-zfh -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rva-aliases-valid.s b/llvm/test/MC/RISCV/rva-aliases-valid.s
--- a/llvm/test/MC/RISCV/rva-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rva-aliases-valid.s
@@ -1,8 +1,8 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+a -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+a -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-S-NOALIAS,CHECK-S-OBJ-NOALIAS %s
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+a \
 # RUN:     | FileCheck -check-prefixes=CHECK-S,CHECK-S-OBJ %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+a -riscv-no-aliases\
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+a -M no-aliases\
 # RUN:     | FileCheck -check-prefixes=CHECK-S-NOALIAS,CHECK-S-OBJ-NOALIAS %s
 # RUN: llvm-mc %s -triple=riscv64 -mattr=+a \
 # RUN:     | FileCheck -check-prefixes=CHECK-S,CHECK-S-OBJ %s
diff --git a/llvm/test/MC/RISCV/rvc-aliases-valid.s b/llvm/test/MC/RISCV/rvc-aliases-valid.s
--- a/llvm/test/MC/RISCV/rvc-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rvc-aliases-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+c -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+c -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c < %s \
 # RUN:     | llvm-objdump -M no-aliases -d - \
diff --git a/llvm/test/MC/RISCV/rvc-hints-valid.s b/llvm/test/MC/RISCV/rvc-hints-valid.s
--- a/llvm/test/MC/RISCV/rvc-hints-valid.s
+++ b/llvm/test/MC/RISCV/rvc-hints-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
-# RUN: llvm-mc %s -triple riscv64 -mattr=+c -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple riscv64 -mattr=+c -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
 # RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+c < %s \
 # RUN:     | llvm-objdump -M no-aliases -d -r - \
diff --git a/llvm/test/MC/RISCV/rvd-aliases-valid.s b/llvm/test/MC/RISCV/rvd-aliases-valid.s
--- a/llvm/test/MC/RISCV/rvd-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rvd-aliases-valid.s
@@ -1,8 +1,8 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+d -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+d -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+d \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+d -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+d -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv64 -mattr=+d \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/rvdc-aliases-valid.s b/llvm/test/MC/RISCV/rvdc-aliases-valid.s
--- a/llvm/test/MC/RISCV/rvdc-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rvdc-aliases-valid.s
@@ -1,6 +1,6 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+d -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+c,+d -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+c,+d -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+c,+d -M no-aliases \
 # RUN:     | FileCheck -check-prefixes=CHECK-EXPAND %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c,+d < %s \
 # RUN:     | llvm-objdump --mattr=+c,+d -M no-aliases -d - \
diff --git a/llvm/test/MC/RISCV/rvf-aliases-valid.s b/llvm/test/MC/RISCV/rvf-aliases-valid.s
--- a/llvm/test/MC/RISCV/rvf-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rvf-aliases-valid.s
@@ -1,8 +1,8 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+f -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+f -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+f \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+f -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+f -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv64 -mattr=+f \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/rvf-user-csr-names.s b/llvm/test/MC/RISCV/rvf-user-csr-names.s
--- a/llvm/test/MC/RISCV/rvf-user-csr-names.s
+++ b/llvm/test/MC/RISCV/rvf-user-csr-names.s
@@ -1,4 +1,4 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -mattr=+f -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -mattr=+f -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+f < %s \
 # RUN:     | llvm-objdump -d --mattr=+f - \
@@ -7,7 +7,7 @@
 # RUN:     | llvm-objdump -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST-ALIAS-NO-F %s
 #
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -mattr=+f -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -mattr=+f -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 -mattr=+f < %s \
 # RUN:     | llvm-objdump -d --mattr=+f - \
diff --git a/llvm/test/MC/RISCV/rvv-user-csr-names.s b/llvm/test/MC/RISCV/rvv-user-csr-names.s
--- a/llvm/test/MC/RISCV/rvv-user-csr-names.s
+++ b/llvm/test/MC/RISCV/rvv-user-csr-names.s
@@ -1,10 +1,10 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -mattr=+f -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -mattr=+f -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+v < %s \
 # RUN:     | llvm-objdump -d --mattr=+v - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST-ALIAS %s
 #
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -mattr=+f -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -mattr=+f -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 -mattr=+v < %s \
 # RUN:     | llvm-objdump -d --mattr=+v - \
diff --git a/llvm/test/MC/RISCV/rvv/aliases.s b/llvm/test/MC/RISCV/rvv/aliases.s
--- a/llvm/test/MC/RISCV/rvv/aliases.s
+++ b/llvm/test/MC/RISCV/rvv/aliases.s
@@ -1,6 +1,6 @@
 # RUN: llvm-mc --triple=riscv64 -mattr +experimental-v < %s --show-encoding 2>&1 \
 # RUN:   -mattr +d | FileCheck --check-prefix=ALIAS %s
-# RUN: llvm-mc --triple=riscv64 -mattr=+experimental-v --riscv-no-aliases < %s \
+# RUN: llvm-mc --triple=riscv64 -mattr=+experimental-v -M no-aliases < %s \
 # RUN:   -mattr +d --show-encoding 2>&1 | FileCheck --check-prefix=NO-ALIAS %s
 
 # ALIAS:    vwcvt.x.x.v     v2, v1, v0.t    # encoding: [0x57,0x61,0x10,0xc4]
diff --git a/llvm/test/MC/RISCV/rvv/fothers.s b/llvm/test/MC/RISCV/rvv/fothers.s
--- a/llvm/test/MC/RISCV/rvv/fothers.s
+++ b/llvm/test/MC/RISCV/rvv/fothers.s
@@ -1,5 +1,5 @@
 # RUN: llvm-mc -triple=riscv64 -show-encoding --mattr=+experimental-v %s \
-# RUN:   --mattr=+f --riscv-no-aliases \
+# RUN:   --mattr=+f -M no-aliases \
 # RUN:   | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 # RUN: not llvm-mc -triple=riscv64 -show-encoding %s 2>&1 \
 # RUN:   | FileCheck %s --check-prefix=CHECK-ERROR
diff --git a/llvm/test/MC/RISCV/rvv/load.s b/llvm/test/MC/RISCV/rvv/load.s
--- a/llvm/test/MC/RISCV/rvv/load.s
+++ b/llvm/test/MC/RISCV/rvv/load.s
@@ -1,5 +1,5 @@
 # RUN: llvm-mc -triple=riscv64 -show-encoding --mattr=+experimental-v %s \
-# RUN:   --riscv-no-aliases | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+# RUN:   -M no-aliases | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 # RUN: not llvm-mc -triple=riscv64 -show-encoding %s 2>&1 \
 # RUN:   | FileCheck %s --check-prefix=CHECK-ERROR
 # RUN: llvm-mc -triple=riscv64 -filetype=obj --mattr=+experimental-v %s \
diff --git a/llvm/test/MC/RISCV/rvv/others.s b/llvm/test/MC/RISCV/rvv/others.s
--- a/llvm/test/MC/RISCV/rvv/others.s
+++ b/llvm/test/MC/RISCV/rvv/others.s
@@ -1,5 +1,5 @@
 # RUN: llvm-mc -triple=riscv64 -show-encoding --mattr=+experimental-v %s \
-# RUN:   --riscv-no-aliases | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+# RUN:   -M no-aliases | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 # RUN: not llvm-mc -triple=riscv64 -show-encoding %s 2>&1 \
 # RUN:   | FileCheck %s --check-prefix=CHECK-ERROR
 # RUN: llvm-mc -triple=riscv64 -filetype=obj --mattr=+experimental-v %s \
diff --git a/llvm/test/MC/RISCV/rvv/store.s b/llvm/test/MC/RISCV/rvv/store.s
--- a/llvm/test/MC/RISCV/rvv/store.s
+++ b/llvm/test/MC/RISCV/rvv/store.s
@@ -1,5 +1,5 @@
 # RUN: llvm-mc -triple=riscv64 -show-encoding --mattr=+experimental-v %s \
-# RUN:   --riscv-no-aliases | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+# RUN:   -M no-aliases | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 # RUN: not llvm-mc -triple=riscv64 -show-encoding %s 2>&1 \
 # RUN:   | FileCheck %s --check-prefix=CHECK-ERROR
 # RUN: llvm-mc -triple=riscv64 -filetype=obj --mattr=+experimental-v %s \
diff --git a/llvm/test/MC/RISCV/rvv/zvlsseg.s b/llvm/test/MC/RISCV/rvv/zvlsseg.s
--- a/llvm/test/MC/RISCV/rvv/zvlsseg.s
+++ b/llvm/test/MC/RISCV/rvv/zvlsseg.s
@@ -1,5 +1,5 @@
 # RUN: llvm-mc -triple=riscv64 -show-encoding --mattr=+experimental-v %s \
-# RUN:   --mattr=+experimental-zvlsseg --riscv-no-aliases \
+# RUN:   --mattr=+experimental-zvlsseg -M no-aliases \
 # RUN:   | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 # RUN: not llvm-mc -triple=riscv64 -show-encoding %s 2>&1 \
 # RUN:   | FileCheck %s --check-prefix=CHECK-ERROR
diff --git a/llvm/test/MC/RISCV/rvzfh-aliases-valid.s b/llvm/test/MC/RISCV/rvzfh-aliases-valid.s
--- a/llvm/test/MC/RISCV/rvzfh-aliases-valid.s
+++ b/llvm/test/MC/RISCV/rvzfh-aliases-valid.s
@@ -1,8 +1,8 @@
-# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zfh -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zfh -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zfh \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
-# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zfh -riscv-no-aliases \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zfh -M no-aliases \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zfh \
 # RUN:     | FileCheck -check-prefix=CHECK-ALIAS %s
diff --git a/llvm/test/MC/RISCV/supervisor-csr-names.s b/llvm/test/MC/RISCV/supervisor-csr-names.s
--- a/llvm/test/MC/RISCV/supervisor-csr-names.s
+++ b/llvm/test/MC/RISCV/supervisor-csr-names.s
@@ -1,10 +1,10 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-objdump -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST-ALIAS %s
 #
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
 # RUN:     | llvm-objdump -d - \
diff --git a/llvm/test/MC/RISCV/user-csr-names.s b/llvm/test/MC/RISCV/user-csr-names.s
--- a/llvm/test/MC/RISCV/user-csr-names.s
+++ b/llvm/test/MC/RISCV/user-csr-names.s
@@ -1,10 +1,10 @@
-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
 # RUN:     | llvm-objdump -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST-ALIAS %s
 #
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -M no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK-INST,CHECK-ENC %s
 # RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
 # RUN:     | llvm-objdump -d - \