Index: llvm/lib/Target/RISCV/RISCVInstrInfoB.td
===================================================================
--- llvm/lib/Target/RISCV/RISCVInstrInfoB.td
+++ llvm/lib/Target/RISCV/RISCVInstrInfoB.td
@@ -171,6 +171,21 @@
                                    SDLoc(N), N->getValueType(0));
 }]>;
 
+def C3LeftShift : PatLeaf<(imm), [{
+  uint64_t C = N->getZExtValue();
+  return C > 3 && ((C % 3) == 0) && isPowerOf2_64(C / 3);
+}]>;
+
+def C5LeftShift : PatLeaf<(imm), [{
+  uint64_t C = N->getZExtValue();
+  return C > 5 && ((C % 5) == 0) && isPowerOf2_64(C / 5);
+}]>;
+
+def C9LeftShift : PatLeaf<(imm), [{
+  uint64_t C = N->getZExtValue();
+  return C > 9 && ((C % 9) == 0) && isPowerOf2_64(C / 9);
+}]>;
+
 //===----------------------------------------------------------------------===//
 // Instruction class templates
 //===----------------------------------------------------------------------===//
@@ -995,6 +1010,16 @@
           (SH3ADD (SH2ADD GPR:$rs1, GPR:$rs1), GPR:$rs2)>;
 def : Pat<(add (mul_oneuse GPR:$rs1, (XLenVT 72)), GPR:$rs2),
           (SH3ADD (SH3ADD GPR:$rs1, GPR:$rs1), GPR:$rs2)>;
+
+def : Pat<(mul GPR:$r, C3LeftShift:$i),
+          (SLLI (SH1ADD GPR:$r, GPR:$r),
+                (BSETINVTwoBitsMaskLow C3LeftShift:$i))>;
+def : Pat<(mul GPR:$r, C5LeftShift:$i),
+          (SLLI (SH2ADD GPR:$r, GPR:$r),
+                (BSETINVTwoBitsMaskLow C5LeftShift:$i))>;
+def : Pat<(mul GPR:$r, C9LeftShift:$i),
+          (SLLI (SH3ADD GPR:$r, GPR:$r),
+                (BSETINVTwoBitsMaskLow C9LeftShift:$i))>;
 } // Predicates = [HasStdExtZba]
 
 let Predicates = [HasStdExtZba, IsRV64] in {
Index: llvm/test/CodeGen/RISCV/rv32zba.ll
===================================================================
--- llvm/test/CodeGen/RISCV/rv32zba.ll
+++ llvm/test/CodeGen/RISCV/rv32zba.ll
@@ -306,14 +306,14 @@
 ;
 ; RV32IB-LABEL: mul96:
 ; RV32IB:       # %bb.0:
-; RV32IB-NEXT:    addi a1, zero, 96
-; RV32IB-NEXT:    mul a0, a0, a1
+; RV32IB-NEXT:    sh1add a0, a0, a0
+; RV32IB-NEXT:    slli a0, a0, 5
 ; RV32IB-NEXT:    ret
 ;
 ; RV32IBA-LABEL: mul96:
 ; RV32IBA:       # %bb.0:
-; RV32IBA-NEXT:    addi a1, zero, 96
-; RV32IBA-NEXT:    mul a0, a0, a1
+; RV32IBA-NEXT:    sh1add a0, a0, a0
+; RV32IBA-NEXT:    slli a0, a0, 5
 ; RV32IBA-NEXT:    ret
   %c = mul i32 %a, 96
   ret i32 %c
@@ -328,14 +328,14 @@
 ;
 ; RV32IB-LABEL: mul160:
 ; RV32IB:       # %bb.0:
-; RV32IB-NEXT:    addi a1, zero, 160
-; RV32IB-NEXT:    mul a0, a0, a1
+; RV32IB-NEXT:    sh2add a0, a0, a0
+; RV32IB-NEXT:    slli a0, a0, 5
 ; RV32IB-NEXT:    ret
 ;
 ; RV32IBA-LABEL: mul160:
 ; RV32IBA:       # %bb.0:
-; RV32IBA-NEXT:    addi a1, zero, 160
-; RV32IBA-NEXT:    mul a0, a0, a1
+; RV32IBA-NEXT:    sh2add a0, a0, a0
+; RV32IBA-NEXT:    slli a0, a0, 5
 ; RV32IBA-NEXT:    ret
   %c = mul i32 %a, 160
   ret i32 %c
@@ -350,14 +350,14 @@
 ;
 ; RV32IB-LABEL: mul288:
 ; RV32IB:       # %bb.0:
-; RV32IB-NEXT:    addi a1, zero, 288
-; RV32IB-NEXT:    mul a0, a0, a1
+; RV32IB-NEXT:    sh3add a0, a0, a0
+; RV32IB-NEXT:    slli a0, a0, 5
 ; RV32IB-NEXT:    ret
 ;
 ; RV32IBA-LABEL: mul288:
 ; RV32IBA:       # %bb.0:
-; RV32IBA-NEXT:    addi a1, zero, 288
-; RV32IBA-NEXT:    mul a0, a0, a1
+; RV32IBA-NEXT:    sh3add a0, a0, a0
+; RV32IBA-NEXT:    slli a0, a0, 5
 ; RV32IBA-NEXT:    ret
   %c = mul i32 %a, 288
   ret i32 %c
Index: llvm/test/CodeGen/RISCV/rv64zba.ll
===================================================================
--- llvm/test/CodeGen/RISCV/rv64zba.ll
+++ llvm/test/CodeGen/RISCV/rv64zba.ll
@@ -596,14 +596,14 @@
 ;
 ; RV64IB-LABEL: mul96:
 ; RV64IB:       # %bb.0:
-; RV64IB-NEXT:    addi a1, zero, 96
-; RV64IB-NEXT:    mul a0, a0, a1
+; RV64IB-NEXT:    sh1add a0, a0, a0
+; RV64IB-NEXT:    slli a0, a0, 5
 ; RV64IB-NEXT:    ret
 ;
 ; RV64IBA-LABEL: mul96:
 ; RV64IBA:       # %bb.0:
-; RV64IBA-NEXT:    addi a1, zero, 96
-; RV64IBA-NEXT:    mul a0, a0, a1
+; RV64IBA-NEXT:    sh1add a0, a0, a0
+; RV64IBA-NEXT:    slli a0, a0, 5
 ; RV64IBA-NEXT:    ret
   %c = mul i64 %a, 96
   ret i64 %c
@@ -618,14 +618,14 @@
 ;
 ; RV64IB-LABEL: mul160:
 ; RV64IB:       # %bb.0:
-; RV64IB-NEXT:    addi a1, zero, 160
-; RV64IB-NEXT:    mul a0, a0, a1
+; RV64IB-NEXT:    sh2add a0, a0, a0
+; RV64IB-NEXT:    slli a0, a0, 5
 ; RV64IB-NEXT:    ret
 ;
 ; RV64IBA-LABEL: mul160:
 ; RV64IBA:       # %bb.0:
-; RV64IBA-NEXT:    addi a1, zero, 160
-; RV64IBA-NEXT:    mul a0, a0, a1
+; RV64IBA-NEXT:    sh2add a0, a0, a0
+; RV64IBA-NEXT:    slli a0, a0, 5
 ; RV64IBA-NEXT:    ret
   %c = mul i64 %a, 160
   ret i64 %c
@@ -640,14 +640,14 @@
 ;
 ; RV64IB-LABEL: mul288:
 ; RV64IB:       # %bb.0:
-; RV64IB-NEXT:    addi a1, zero, 288
-; RV64IB-NEXT:    mul a0, a0, a1
+; RV64IB-NEXT:    sh3add a0, a0, a0
+; RV64IB-NEXT:    slli a0, a0, 5
 ; RV64IB-NEXT:    ret
 ;
 ; RV64IBA-LABEL: mul288:
 ; RV64IBA:       # %bb.0:
-; RV64IBA-NEXT:    addi a1, zero, 288
-; RV64IBA-NEXT:    mul a0, a0, a1
+; RV64IBA-NEXT:    sh3add a0, a0, a0
+; RV64IBA-NEXT:    slli a0, a0, 5
 ; RV64IBA-NEXT:    ret
   %c = mul i64 %a, 288
   ret i64 %c