diff --git a/llvm/lib/Target/PowerPC/PPCCallingConv.h b/llvm/lib/Target/PowerPC/PPCCallingConv.h
--- a/llvm/lib/Target/PowerPC/PPCCallingConv.h
+++ b/llvm/lib/Target/PowerPC/PPCCallingConv.h
@@ -31,6 +31,9 @@
 bool CC_PPC32_SVR4(unsigned ValNo, MVT ValVT, MVT LocVT,
                    CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
                    CCState &State);
+bool CC_PPC64_ELF(unsigned ValNo, MVT ValVT, MVT LocVT,
+                  CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
+                  CCState &State);
 bool CC_PPC64_ELF_FIS(unsigned ValNo, MVT ValVT, MVT LocVT,
                       CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
                       CCState &State);
diff --git a/llvm/lib/Target/PowerPC/PPCCallingConv.cpp b/llvm/lib/Target/PowerPC/PPCCallingConv.cpp
--- a/llvm/lib/Target/PowerPC/PPCCallingConv.cpp
+++ b/llvm/lib/Target/PowerPC/PPCCallingConv.cpp
@@ -1,4 +1,4 @@
-//===-- PPCCallingConv.h - --------------------------------------*- C++ -*-===//
+//===-- PPCCallingConv.cpp - ------------------------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -21,6 +21,42 @@
   return false;
 }
 
+// This function handles the shadowing of GPRs for fp and vector types,
+// and is a depiction of the algorithm described in the ELFv2 ABI,
+// Section 2.2.4.1: Parameter Passing Register Selection Algorithm.
+inline bool CC_PPC64_ELF_Shadow_GPR_Regs(unsigned &ValNo, MVT &ValVT,
+                                         MVT &LocVT,
+                                         CCValAssign::LocInfo &LocInfo,
+                                         ISD::ArgFlagsTy &ArgFlags,
+                                         CCState &State) {
+
+  // The 64-bit ELFv2 ABI-defined parameter passing general purpose registers.
+  static const MCPhysReg ELF64ArgGPRs[] = {PPC::X3, PPC::X4, PPC::X5, PPC::X6,
+                                           PPC::X7, PPC::X8, PPC::X9, PPC::X10};
+  const unsigned ELF64NumArgGPRs = std::size(ELF64ArgGPRs);
+
+  unsigned FirstUnallocGPR = State.getFirstUnallocated(ELF64ArgGPRs);
+  if (FirstUnallocGPR == ELF64NumArgGPRs)
+    return false;
+
+  // As described in 2.2.4.1 under the "float" section, shadow a single GPR
+  // for single/double precision. ppcf128 gets broken up into two doubles
+  // and will also shadow GPRs within this section.
+  if (LocVT == MVT::f32 || LocVT == MVT::f64)
+    State.AllocateReg(ELF64ArgGPRs);
+  else if (LocVT.is128BitVector() || (LocVT == MVT::f128)) {
+    // For vector and __float128 (which is represents the "vector" section
+    // in 2.2.4.1), shadow two even GPRs (skipping the odd one if it is next
+    // in the allocation order). To check if the GPR is even, the specific
+    // condition checks if the register allocated is odd, because the even
+    // physical registers are odd values.
+    if ((State.AllocateReg(ELF64ArgGPRs) - PPC::X3) % 2 == 1)
+      State.AllocateReg(ELF64ArgGPRs);
+    State.AllocateReg(ELF64ArgGPRs);
+  }
+  return false;
+}
+
 static bool CC_PPC32_SVR4_Custom_Dummy(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
                                        CCValAssign::LocInfo &LocInfo,
                                        ISD::ArgFlagsTy &ArgFlags,
diff --git a/llvm/lib/Target/PowerPC/PPCCallingConv.td b/llvm/lib/Target/PowerPC/PPCCallingConv.td
--- a/llvm/lib/Target/PowerPC/PPCCallingConv.td
+++ b/llvm/lib/Target/PowerPC/PPCCallingConv.td
@@ -112,10 +112,46 @@
   CCCustom<"CC_PPC_AnyReg_Error">
 ]>;
 
-// Note that we don't currently have calling conventions for 64-bit
-// PowerPC, but handle all the complexities of the ABI in the lowering
-// logic.  FIXME: See if the logic can be simplified with use of CCs.
-// This may require some extensions to current table generation.
+// Calling Convention corresponding to the 64-bit PowerPC ELFv2 ABI.
+// This calling convention currently only handles integers, floats and
+// vectors within registers, as well as it handles the shadowing of GPRs
+// when floating point and vector arguments are used.
+// FIXME: This calling convention needs to be extended to handle all types and
+// complexities of the ABI.
+let Entry = 1 in
+def CC_PPC64_ELF : CallingConv<[
+  CCIfCC<"CallingConv::AnyReg", CCDelegateTo<CC_PPC64_AnyReg>>,
+
+  CCIfType<[i1],  CCPromoteToType<i64>>,
+  CCIfType<[i8],  CCPromoteToType<i64>>,
+  CCIfType<[i16], CCPromoteToType<i64>>,
+  CCIfType<[i32], CCPromoteToType<i64>>,
+  CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6, X7, X8, X9, X10]>>,
+
+  // Handle fp types and shadow the corresponding registers as necessary.
+  CCIfType<[f32, f64], CCIfNotVarArg<CCCustom<"CC_PPC64_ELF_Shadow_GPR_Regs">>>,
+  CCIfType<[f32, f64],
+           CCIfNotVarArg<CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8, F9, F10,
+                                        F11, F12, F13]>>>,
+
+  // f128 is handled through vector registers instead of fp registers.
+  CCIfType<[f128],
+           CCIfSubtarget<"hasAltivec()",
+           CCIfNotVarArg<CCCustom<"CC_PPC64_ELF_Shadow_GPR_Regs">>>>,
+  CCIfType<[f128],
+           CCIfSubtarget<"hasAltivec()",
+           CCIfNotVarArg<CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10,
+                                        V11, V12, V13]>>>>,
+
+  // Handle support for vector types, and shadow GPRs as necessary.
+  CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64, v1i128],
+           CCIfSubtarget<"hasAltivec()",
+           CCIfNotVarArg<CCCustom<"CC_PPC64_ELF_Shadow_GPR_Regs">>>>,
+  CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64, v1i128],
+           CCIfSubtarget<"hasAltivec()",
+           CCIfNotVarArg<CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10,
+                                        V11, V12, V13]>>>>,
+]>;
 
 // Simple calling convention for 64-bit ELF PowerPC fast isel.
 // Only handle ints and floats.  All ints are promoted to i64.
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -18253,9 +18253,9 @@
                                                  bool IsVarArg) const {
   switch (CC) {
   case CallingConv::Cold:
-    return (Return ? RetCC_PPC_Cold : CC_PPC64_ELF_FIS);
+    return (Return ? RetCC_PPC_Cold : CC_PPC64_ELF);
   default:
-    return CC_PPC64_ELF_FIS;
+    return CC_PPC64_ELF;
   }
 }
 
diff --git a/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-fp128.ll b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-fp128.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-fp128.ll
@@ -0,0 +1,122 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -global-isel \
+; RUN:     -verify-machineinstrs -stop-after=irtranslator < %s | FileCheck %s
+
+; Passing ppc_fp128 in registers (in fp registers as f64)
+define void @test_ppc_fp128_1(ppc_fp128 %a, ppc_fp128 %b, ppc_fp128 %c, ppc_fp128 %d, ppc_fp128 %e) {
+  ; CHECK-LABEL: name: test_ppc_fp128_1
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $f3, $f4, $f5, $f6, $f7, $f8, $f9, $f10
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $f2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   [[MV:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY]](s64), [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $f4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $f3
+  ; CHECK-NEXT:   [[MV1:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY2]](s64), [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $f6
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $f5
+  ; CHECK-NEXT:   [[MV2:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY4]](s64), [[COPY5]](s64)
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $f8
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $f7
+  ; CHECK-NEXT:   [[MV3:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY6]](s64), [[COPY7]](s64)
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(s64) = COPY $f10
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(s64) = COPY $f9
+  ; CHECK-NEXT:   [[MV4:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY8]](s64), [[COPY9]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_ppc_fp128_2(i32 %a, i32 %b, ppc_fp128 %c, i32 %d) {
+  ; CHECK-LABEL: name: test_ppc_fp128_2
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $x3, $x4, $x7
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $f2
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   [[MV:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY2]](s64), [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_ppc_fp128_3(ppc_fp128 %a, i32 %b, ppc_fp128 %c, i32 %d, i32 %e) {
+  ; CHECK-LABEL: name: test_ppc_fp128_3
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $f3, $f4, $x5, $x8, $x9
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $f2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   [[MV:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY]](s64), [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $f4
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $f3
+  ; CHECK-NEXT:   [[MV1:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY3]](s64), [[COPY4]](s64)
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x8
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY5]](s64)
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY6]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+; Passing fp128 in registers (in vector registers)
+define void @test_fp128_1(fp128 %a, fp128 %b, fp128 %c, fp128 %d, fp128 %e) {
+  ; CHECK-LABEL: name: test_fp128_1
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $v4, $v5, $v6
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s128) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s128) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s128) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s128) = COPY $v5
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s128) = COPY $v6
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_fp128_2(i32 %a, i32 %b, fp128 %c, i32 %d) {
+  ; CHECK-LABEL: name: test_fp128_2
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $x3, $x4, $x7
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s128) = COPY $v2
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_fp128_3(fp128 %a, i32 %b, fp128 %c, i32 %d, i32 %e) {
+  ; CHECK-LABEL: name: test_fp128_3
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $x5, $x9, $x10
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s128) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s128) = COPY $v3
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x10
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
diff --git a/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-mixed-types.ll b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-mixed-types.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-mixed-types.ll
@@ -0,0 +1,235 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -global-isel \
+; RUN:     -verify-machineinstrs -stop-after=irtranslator < %s | FileCheck %s
+
+; Mixed parameter passing involving integers, floats, vectors (all in registers).
+define void @test_mixed_arg1(i32 %a, i32 %b, i32 %c, <4 x i32> %d) {
+  ; CHECK-LABEL: name: test_mixed_arg1
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $x3, $x4, $x5
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg2(i32 %a, i32 %b, <4 x i32> %c, i32 %d) {
+  ; CHECK-LABEL: name: test_mixed_arg2
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $x3, $x4, $x7
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg3(i32 %a, i32 %b, i32 %c, <4 x i32> %d, i32 %e) {
+  ; CHECK-LABEL: name: test_mixed_arg3
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $x3, $x4, $x5, $x9
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[TRUNC3:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg4(<2 x double> %a, <4 x i32> %b, <4 x i32> %c, i32 %d, i64 %e, double %f) {
+  ; CHECK-LABEL: name: test_mixed_arg4
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $v2, $v3, $v4, $x9, $x10
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<4 x s32>) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x10
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg5(float %a, i32 %b, <2 x i64> %c, i64 %d, double %e, <4 x float> %f) {
+  ; CHECK-LABEL: name: test_mixed_arg5
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $v2, $v3, $x4, $x7
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $f1
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<2 x s64>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $f2
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg6(i64 %a, double %b, i32 %c, i32 %d, <2 x i64> %e, <4 x i32> %f, <4 x i32> %g, <4 x float> %h) {
+  ; CHECK-LABEL: name: test_mixed_arg6
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $v2, $v3, $v4, $v5, $x3, $x5, $x6
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<2 x s64>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(<4 x s32>) = COPY $v4
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(<4 x s32>) = COPY $v5
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg7(i32 %a, float %b, i32 %c, float %d, <4 x float> %e, <4 x i32> %f) {
+  ; CHECK-LABEL: name: test_mixed_arg7
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $v2, $v3, $x3, $x5
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f1
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s32) = COPY $f2
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg8(<4 x i32> %a, float %b, i32 %c, i64 %d, <2 x double> %e, double %f) {
+  ; CHECK-LABEL: name: test_mixed_arg8
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $v2, $v3, $x6, $x7
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f1
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<2 x s64>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $f2
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg9(<4 x float> %a, i32 %b, i32 %c, <4 x i32> %d, i32 %e, double %f) {
+  ; CHECK-LABEL: name: test_mixed_arg9
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $v2, $v3, $x5, $x6, $x9
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg10(i32 %a, float %b, i64 %c, <2 x double> %d, <4 x float> %e, double %f) {
+  ; CHECK-LABEL: name: test_mixed_arg10
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $v2, $v3, $x3, $x5
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f1
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<2 x s64>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $f2
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg11(double %a, float %b, i32 %c, i64 %d, i32 %e, double %f, <4 x i32> %g) {
+  ; CHECK-LABEL: name: test_mixed_arg11
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $f3, $v2, $x5, $x6, $x7
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f2
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $f3
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg12(<2 x double> %a, <4 x i32> %b, i32 %c, i32 %d, i64 %e, float %f) {
+  ; CHECK-LABEL: name: test_mixed_arg12
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $v2, $v3, $x7, $x8, $x9
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x8
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s32) = COPY $f1
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_mixed_arg13(i8 %a, <2 x double> %b, i64 %c, <4 x i32> %d, double %e) {
+  ; CHECK-LABEL: name: test_mixed_arg13
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $v2, $v3, $x3, $x7
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
diff --git a/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-scalar.ll b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-scalar.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-scalar.ll
@@ -0,0 +1,170 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -global-isel \
+; RUN:     -verify-machineinstrs -stop-after=irtranslator < %s | FileCheck %s
+
+; Pass up to eight integer arguments in registers.
+define void @test_scalar1(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h) {
+  ; CHECK-LABEL: name: test_scalar1
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[TRUNC3:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[TRUNC4:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x8
+  ; CHECK-NEXT:   [[TRUNC5:%[0-9]+]]:_(s32) = G_TRUNC [[COPY5]](s64)
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[TRUNC6:%[0-9]+]]:_(s32) = G_TRUNC [[COPY6]](s64)
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x10
+  ; CHECK-NEXT:   [[TRUNC7:%[0-9]+]]:_(s32) = G_TRUNC [[COPY7]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_scalar2(i64 %a, i64 %b, i64 %c, i64 %d, i64 %e, i64 %f, i64 %g, i64 %h) {
+  ; CHECK-LABEL: name: test_scalar2
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x8
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x10
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_scalar3(i8 %a, i8 %b, i8 %c, i8 %d, i8 %e, i8 %f, i8 %g, i8 %h) {
+  ; CHECK-LABEL: name: test_scalar3
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s8) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s8) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[TRUNC3:%[0-9]+]]:_(s8) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[TRUNC4:%[0-9]+]]:_(s8) = G_TRUNC [[COPY4]](s64)
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x8
+  ; CHECK-NEXT:   [[TRUNC5:%[0-9]+]]:_(s8) = G_TRUNC [[COPY5]](s64)
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[TRUNC6:%[0-9]+]]:_(s8) = G_TRUNC [[COPY6]](s64)
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x10
+  ; CHECK-NEXT:   [[TRUNC7:%[0-9]+]]:_(s8) = G_TRUNC [[COPY7]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_scalar4(i16 %a, i16 %b, i16 %c, i16 %d, i16 %e, i16 %f, i16 %g, i16 %h) {
+  ; CHECK-LABEL: name: test_scalar4
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s64)
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s64)
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[COPY4]](s64)
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x8
+  ; CHECK-NEXT:   [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[COPY5]](s64)
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[COPY6]](s64)
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x10
+  ; CHECK-NEXT:   [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[COPY7]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_scalar5(i128 %a, i128 %b, i128 %c, i128 %d) {
+  ; CHECK-LABEL: name: test_scalar5
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK-NEXT:   [[MV:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY]](s64), [[COPY1]](s64)
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK-NEXT:   [[MV1:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY2]](s64), [[COPY3]](s64)
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x7
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x8
+  ; CHECK-NEXT:   [[MV2:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY4]](s64), [[COPY5]](s64)
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x9
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x10
+  ; CHECK-NEXT:   [[MV3:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[COPY6]](s64), [[COPY7]](s64)
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+; Pass up to thirteen fp arguments in registers.
+define void @test_scalar6(float %a, float %b, float %c, float %d, float %e, float %f, float %g, float %h, float %i, float %j, float %k, float %l, float %m) {
+  ; CHECK-LABEL: name: test_scalar6
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $f3, $f4, $f5, $f6, $f7, $f8, $f9, $f10, $f11, $f12, $f13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $f1
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f2
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY $f3
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s32) = COPY $f4
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s32) = COPY $f5
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s32) = COPY $f6
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s32) = COPY $f7
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s32) = COPY $f8
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(s32) = COPY $f9
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(s32) = COPY $f10
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(s32) = COPY $f11
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(s32) = COPY $f12
+  ; CHECK-NEXT:   [[COPY12:%[0-9]+]]:_(s32) = COPY $f13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_scalar7(double %a, double %b, double %c, double %d, double %e, double %f, double %g, double %h, double %i, double %j, double %k, double %l, double %m) {
+  ; CHECK-LABEL: name: test_scalar7
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $f1, $f2, $f3, $f4, $f5, $f6, $f7, $f8, $f9, $f10, $f11, $f12, $f13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $f1
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $f2
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $f3
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $f4
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $f5
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $f6
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $f7
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $f8
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(s64) = COPY $f9
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(s64) = COPY $f10
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(s64) = COPY $f11
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(s64) = COPY $f12
+  ; CHECK-NEXT:   [[COPY12:%[0-9]+]]:_(s64) = COPY $f13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
diff --git a/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-vectors.ll b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-vectors.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering-vectors.ll
@@ -0,0 +1,159 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -global-isel \
+; RUN:     -verify-machineinstrs -stop-after=irtranslator < %s | FileCheck %s
+
+; Pass up to twelve vector arguments in registers.
+define void @test_vec1(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c, <4 x i32> %d, <4 x i32> %e, <4 x i32> %f, <4 x i32> %g, <4 x i32> %h, <4 x i32> %i, <4 x i32> %j, <4 x i32> %k, <4 x i32> %l) {
+  ; CHECK-LABEL: name: test_vec1
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $v4, $v5, $v6, $v7, $v8, $v9, $v10, $v11, $v12, $v13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<4 x s32>) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<4 x s32>) = COPY $v5
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<4 x s32>) = COPY $v6
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<4 x s32>) = COPY $v7
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(<4 x s32>) = COPY $v8
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(<4 x s32>) = COPY $v9
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(<4 x s32>) = COPY $v10
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(<4 x s32>) = COPY $v11
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(<4 x s32>) = COPY $v12
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(<4 x s32>) = COPY $v13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_vec2(<2 x i64> %a, <2 x i64> %b, <2 x i64> %c, <2 x i64> %d, <2 x i64> %e, <2 x i64> %f, <2 x i64> %g, <2 x i64> %h, <2 x i64> %i, <2 x i64> %j, <2 x i64> %k, <2 x i64> %l) {
+  ; CHECK-LABEL: name: test_vec2
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $v4, $v5, $v6, $v7, $v8, $v9, $v10, $v11, $v12, $v13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<2 x s64>) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<2 x s64>) = COPY $v5
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<2 x s64>) = COPY $v6
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<2 x s64>) = COPY $v7
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(<2 x s64>) = COPY $v8
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(<2 x s64>) = COPY $v9
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(<2 x s64>) = COPY $v10
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(<2 x s64>) = COPY $v11
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(<2 x s64>) = COPY $v12
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(<2 x s64>) = COPY $v13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_vec3(<8 x i16> %a, <8 x i16> %b, <8 x i16> %c, <8 x i16> %d, <8 x i16> %e, <8 x i16> %f, <8 x i16> %g, <8 x i16> %h, <8 x i16> %i, <8 x i16> %j, <8 x i16> %k, <8 x i16> %l) {
+  ; CHECK-LABEL: name: test_vec3
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $v4, $v5, $v6, $v7, $v8, $v9, $v10, $v11, $v12, $v13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<8 x s16>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<8 x s16>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<8 x s16>) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<8 x s16>) = COPY $v5
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<8 x s16>) = COPY $v6
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<8 x s16>) = COPY $v7
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(<8 x s16>) = COPY $v8
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(<8 x s16>) = COPY $v9
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(<8 x s16>) = COPY $v10
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(<8 x s16>) = COPY $v11
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(<8 x s16>) = COPY $v12
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(<8 x s16>) = COPY $v13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_vec4(<16 x i8> %a, <16 x i8> %b, <16 x i8> %c, <16 x i8> %d, <16 x i8> %e, <16 x i8> %f, <16 x i8> %g, <16 x i8> %h, <16 x i8> %i, <16 x i8> %j, <16 x i8> %k, <16 x i8> %l) {
+  ; CHECK-LABEL: name: test_vec4
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $v4, $v5, $v6, $v7, $v8, $v9, $v10, $v11, $v12, $v13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<16 x s8>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<16 x s8>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<16 x s8>) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<16 x s8>) = COPY $v5
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<16 x s8>) = COPY $v6
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<16 x s8>) = COPY $v7
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(<16 x s8>) = COPY $v8
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(<16 x s8>) = COPY $v9
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(<16 x s8>) = COPY $v10
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(<16 x s8>) = COPY $v11
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(<16 x s8>) = COPY $v12
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(<16 x s8>) = COPY $v13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_vec5(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d, <4 x float> %e, <4 x float> %f, <4 x float> %g, <4 x float> %h, <4 x float> %i, <4 x float> %j, <4 x float> %k, <4 x float> %l) {
+  ; CHECK-LABEL: name: test_vec5
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $v4, $v5, $v6, $v7, $v8, $v9, $v10, $v11, $v12, $v13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<4 x s32>) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<4 x s32>) = COPY $v5
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<4 x s32>) = COPY $v6
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<4 x s32>) = COPY $v7
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(<4 x s32>) = COPY $v8
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(<4 x s32>) = COPY $v9
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(<4 x s32>) = COPY $v10
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(<4 x s32>) = COPY $v11
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(<4 x s32>) = COPY $v12
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(<4 x s32>) = COPY $v13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_vec6(<2 x double> %a, <2 x double> %b, <2 x double> %c, <2 x double> %d, <2 x double> %e, <2 x double> %f, <2 x double> %g, <2 x double> %h, <2 x double> %i, <2 x double> %j, <2 x double> %k, <2 x double> %l) {
+  ; CHECK-LABEL: name: test_vec6
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $v4, $v5, $v6, $v7, $v8, $v9, $v10, $v11, $v12, $v13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(<2 x s64>) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(<2 x s64>) = COPY $v5
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(<2 x s64>) = COPY $v6
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(<2 x s64>) = COPY $v7
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(<2 x s64>) = COPY $v8
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(<2 x s64>) = COPY $v9
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(<2 x s64>) = COPY $v10
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(<2 x s64>) = COPY $v11
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(<2 x s64>) = COPY $v12
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(<2 x s64>) = COPY $v13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
+define void @test_vec7(<1 x i128> %a, <1 x i128> %b, <1 x i128> %c, <1 x i128> %d, <1 x i128> %e, <1 x i128> %f, <1 x i128> %g, <1 x i128> %h, <1 x i128> %i, <1 x i128> %j, <1 x i128> %k, <1 x i128> %l) {
+  ; CHECK-LABEL: name: test_vec7
+  ; CHECK: bb.1.entry:
+  ; CHECK-NEXT:   liveins: $v2, $v3, $v4, $v5, $v6, $v7, $v8, $v9, $v10, $v11, $v12, $v13
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s128) = COPY $v2
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s128) = COPY $v3
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s128) = COPY $v4
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s128) = COPY $v5
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s128) = COPY $v6
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:_(s128) = COPY $v7
+  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s128) = COPY $v8
+  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s128) = COPY $v9
+  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(s128) = COPY $v10
+  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:_(s128) = COPY $v11
+  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:_(s128) = COPY $v12
+  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:_(s128) = COPY $v13
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm
+entry:
+  ret void
+}
+
diff --git a/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering.ll b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering.ll
--- a/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering.ll
+++ b/llvm/test/CodeGen/PowerPC/GlobalISel/irtranslator-args-lowering.ll
@@ -73,18 +73,21 @@
   ret void
 }
 
+; TODO: The correct registers used to pass struct arguments in this example
+; are R3, R4 and R5. Currently, the calling convention used for GlobalISel
+; does not handle passing structs and will need to implemented at a later time.
 define dso_local void @foo_struct(%struct.A %a) #0 {
   ; CHECK-LABEL: name: foo_struct
   ; CHECK: bb.1.entry:
-  ; CHECK:   liveins: $f1, $x3, $x4, $x5, $x6
+  ; CHECK:   liveins: $f1, $x3, $x5, $x6, $x7
   ; CHECK:   [[COPY:%[0-9]+]]:_(s64) = COPY $x3
   ; CHECK:   [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[COPY]](s64)
   ; CHECK:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f1
-  ; CHECK:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x4
+  ; CHECK:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x5
   ; CHECK:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
-  ; CHECK:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x5
+  ; CHECK:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x6
   ; CHECK:   [[TRUNC3:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
-  ; CHECK:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x6
+  ; CHECK:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x7
   ; CHECK:   [[TRUNC4:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
   ; CHECK:   BLR8 implicit $lr8, implicit $rm
 entry: