[GISel][RISCV] Anyextend before copying f16 -> i32/i64 (#94993)

Fixes type check failure in
https://github.com/llvm/llvm-project/pull/94110#issuecomment-2158417937

2 files changed, 562 insertions, 7 deletions

diff --git a/llvm/lib/Target/RISCV/GISel/RISCVCallLowering.cpp b/llvm/lib/Target/RISCV/GISel/RISCVCallLowering.cpp
index beee940..2bfee45 100644
--- a/llvm/lib/Target/RISCV/GISel/RISCVCallLowering.cpp
+++ b/llvm/lib/Target/RISCV/GISel/RISCVCallLowering.cpp
@@ -102,9 +102,14 @@ struct RISCVOutgoingValueHandler : public CallLowering::OutgoingValueHandler {
 
   void assignValueToReg(Register ValVReg, Register PhysReg,
                         const CCValAssign &VA) override {
-    // If we're passing an f32 value into an i64, anyextend before copying.
-    if (VA.getLocVT() == MVT::i64 && VA.getValVT() == MVT::f32)
-      ValVReg = MIRBuilder.buildAnyExt(LLT::scalar(64), ValVReg).getReg(0);
+    // If we're passing a smaller fp value into a larger integer register,
+    // anyextend before copying.
+    if ((VA.getLocVT() == MVT::i64 && VA.getValVT() == MVT::f32) ||
+        ((VA.getLocVT() == MVT::i32 || VA.getLocVT() == MVT::i64) &&
+         VA.getValVT() == MVT::f16)) {
+      LLT DstTy = LLT::scalar(VA.getLocVT().getSizeInBits());
+      ValVReg = MIRBuilder.buildAnyExt(DstTy, ValVReg).getReg(0);
+    }
 
     Register ExtReg = extendRegister(ValVReg, VA);
     MIRBuilder.buildCopy(PhysReg, ExtReg);
diff --git a/llvm/test/CodeGen/RISCV/GlobalISel/irtranslator/calling-conv-half.ll b/llvm/test/CodeGen/RISCV/GlobalISel/irtranslator/calling-conv-half.ll
index 0a0828e..04fa62b 100644
--- a/llvm/test/CodeGen/RISCV/GlobalISel/irtranslator/calling-conv-half.ll
+++ b/llvm/test/CodeGen/RISCV/GlobalISel/irtranslator/calling-conv-half.ll
@@ -1,10 +1,16 @@
 ; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
-; RUN: llc -mtriple=riscv32 -global-isel -stop-after=irtranslator < %s \
+; RUN: llc -mtriple=riscv32 -global-isel -stop-after=irtranslator -verify-machineinstrs < %s \
 ; RUN:   | FileCheck -check-prefix=RV32I %s
-; RUN: llc -mtriple=riscv32 -mattr=+f -global-isel -stop-after=irtranslator < %s \
+; RUN: llc -mtriple=riscv32 -mattr=+f -global-isel -stop-after=irtranslator -verify-machineinstrs < %s \
 ; RUN:   | FileCheck -check-prefix=RV32IF %s
-; RUN: llc -mtriple=riscv32 -mattr=+zfh -global-isel -stop-after=irtranslator < %s \
+; RUN: llc -mtriple=riscv32 -mattr=+zfh -global-isel -stop-after=irtranslator -verify-machineinstrs < %s \
 ; RUN:   | FileCheck -check-prefix=RV32IZFH %s
+; RUN: llc -mtriple=riscv64 -global-isel -stop-after=irtranslator -verify-machineinstrs < %s \
+; RUN:   | FileCheck -check-prefix=RV64I %s
+; RUN: llc -mtriple=riscv64 -mattr=+f -global-isel -stop-after=irtranslator -verify-machineinstrs < %s \
+; RUN:   | FileCheck -check-prefix=RV64IF %s
+; RUN: llc -mtriple=riscv64 -mattr=+zfh -global-isel -stop-after=irtranslator -verify-machineinstrs < %s \
+; RUN:   | FileCheck -check-prefix=RV64IZFH %s
 
 define half @callee_half_in_regs(half %x) nounwind {
   ; RV32I-LABEL: name: callee_half_in_regs
@@ -34,6 +40,34 @@ define half @callee_half_in_regs(half %x) nounwind {
   ; RV32IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s16) = COPY $f10_h
   ; RV32IZFH-NEXT:   $f10_h = COPY [[COPY]](s16)
   ; RV32IZFH-NEXT:   PseudoRET implicit $f10_h
+  ;
+  ; RV64I-LABEL: name: callee_half_in_regs
+  ; RV64I: bb.1 (%ir-block.0):
+  ; RV64I-NEXT:   liveins: $x10
+  ; RV64I-NEXT: {{  $}}
+  ; RV64I-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s64)
+  ; RV64I-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64I-NEXT:   PseudoRET implicit $x10
+  ;
+  ; RV64IF-LABEL: name: callee_half_in_regs
+  ; RV64IF: bb.1 (%ir-block.0):
+  ; RV64IF-NEXT:   liveins: $f10_f
+  ; RV64IF-NEXT: {{  $}}
+  ; RV64IF-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT]](s32)
+  ; RV64IF-NEXT:   PseudoRET implicit $f10_f
+  ;
+  ; RV64IZFH-LABEL: name: callee_half_in_regs
+  ; RV64IZFH: bb.1 (%ir-block.0):
+  ; RV64IZFH-NEXT:   liveins: $f10_h
+  ; RV64IZFH-NEXT: {{  $}}
+  ; RV64IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY]](s16)
+  ; RV64IZFH-NEXT:   PseudoRET implicit $f10_h
   ret half %x
 }
 
@@ -84,6 +118,53 @@ define half @caller_half_in_regs(half %x) nounwind {
   ; RV32IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s16) = COPY $f10_h
   ; RV32IZFH-NEXT:   $f10_h = COPY [[COPY1]](s16)
   ; RV32IZFH-NEXT:   PseudoRET implicit $f10_h
+  ;
+  ; RV64I-LABEL: name: caller_half_in_regs
+  ; RV64I: bb.1 (%ir-block.0):
+  ; RV64I-NEXT:   liveins: $x10
+  ; RV64I-NEXT: {{  $}}
+  ; RV64I-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s64)
+  ; RV64I-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64I-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64I-NEXT:   PseudoCALL target-flags(riscv-call) @caller_half_in_regs, csr_ilp32_lp64, implicit-def $x1, implicit $x10, implicit-def $x10
+  ; RV64I-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64I-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s64)
+  ; RV64I-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT1]](s64)
+  ; RV64I-NEXT:   PseudoRET implicit $x10
+  ;
+  ; RV64IF-LABEL: name: caller_half_in_regs
+  ; RV64IF: bb.1 (%ir-block.0):
+  ; RV64IF-NEXT:   liveins: $f10_f
+  ; RV64IF-NEXT: {{  $}}
+  ; RV64IF-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+  ; RV64IF-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IF-NEXT:   [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT]](s32)
+  ; RV64IF-NEXT:   PseudoCALL target-flags(riscv-call) @caller_half_in_regs, csr_ilp32f_lp64f, implicit-def $x1, implicit $f10_f, implicit-def $f10_f
+  ; RV64IF-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IF-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT1]](s32)
+  ; RV64IF-NEXT:   PseudoRET implicit $f10_f
+  ;
+  ; RV64IZFH-LABEL: name: caller_half_in_regs
+  ; RV64IZFH: bb.1 (%ir-block.0):
+  ; RV64IZFH-NEXT:   liveins: $f10_h
+  ; RV64IZFH-NEXT: {{  $}}
+  ; RV64IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY]](s16)
+  ; RV64IZFH-NEXT:   PseudoCALL target-flags(riscv-call) @caller_half_in_regs, csr_ilp32f_lp64f, implicit-def $x1, implicit $f10_h, implicit-def $f10_h
+  ; RV64IZFH-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY1]](s16)
+  ; RV64IZFH-NEXT:   PseudoRET implicit $f10_h
   %y = call half @caller_half_in_regs(half %x)
   ret half %y
 }
@@ -119,6 +200,40 @@ define half @callee_half_mixed_with_int(i32 %x0, half %x) nounwind {
   ; RV32IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s16) = COPY $f10_h
   ; RV32IZFH-NEXT:   $f10_h = COPY [[COPY1]](s16)
   ; RV32IZFH-NEXT:   PseudoRET implicit $f10_h
+  ;
+  ; RV64I-LABEL: name: callee_half_mixed_with_int
+  ; RV64I: bb.1 (%ir-block.0):
+  ; RV64I-NEXT:   liveins: $x10, $x11
+  ; RV64I-NEXT: {{  $}}
+  ; RV64I-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64I-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+  ; RV64I-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s64)
+  ; RV64I-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64I-NEXT:   PseudoRET implicit $x10
+  ;
+  ; RV64IF-LABEL: name: callee_half_mixed_with_int
+  ; RV64IF: bb.1 (%ir-block.0):
+  ; RV64IF-NEXT:   liveins: $x10, $f10_f
+  ; RV64IF-NEXT: {{  $}}
+  ; RV64IF-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IF-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64IF-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT]](s32)
+  ; RV64IF-NEXT:   PseudoRET implicit $f10_f
+  ;
+  ; RV64IZFH-LABEL: name: callee_half_mixed_with_int
+  ; RV64IZFH: bb.1 (%ir-block.0):
+  ; RV64IZFH-NEXT:   liveins: $x10, $f10_h
+  ; RV64IZFH-NEXT: {{  $}}
+  ; RV64IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IZFH-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY1]](s16)
+  ; RV64IZFH-NEXT:   PseudoRET implicit $f10_h
   ret half %x
 }
 
@@ -175,6 +290,65 @@ define half @caller_half_mixed_with_int(half %x, i32 %x0) nounwind {
   ; RV32IZFH-NEXT:   [[COPY2:%[0-9]+]]:_(s16) = COPY $f10_h
   ; RV32IZFH-NEXT:   $f10_h = COPY [[COPY2]](s16)
   ; RV32IZFH-NEXT:   PseudoRET implicit $f10_h
+  ;
+  ; RV64I-LABEL: name: caller_half_mixed_with_int
+  ; RV64I: bb.1 (%ir-block.0):
+  ; RV64I-NEXT:   liveins: $x10, $x11
+  ; RV64I-NEXT: {{  $}}
+  ; RV64I-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s64)
+  ; RV64I-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+  ; RV64I-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; RV64I-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64I-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC1]](s32)
+  ; RV64I-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64I-NEXT:   $x11 = COPY [[ANYEXT1]](s64)
+  ; RV64I-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_mixed_with_int, csr_ilp32_lp64, implicit-def $x1, implicit $x10, implicit $x11, implicit-def $x10
+  ; RV64I-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64I-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s64)
+  ; RV64I-NEXT:   [[ANYEXT2:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC2]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT2]](s64)
+  ; RV64I-NEXT:   PseudoRET implicit $x10
+  ;
+  ; RV64IF-LABEL: name: caller_half_mixed_with_int
+  ; RV64IF: bb.1 (%ir-block.0):
+  ; RV64IF-NEXT:   liveins: $x10, $f10_f
+  ; RV64IF-NEXT: {{  $}}
+  ; RV64IF-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+  ; RV64IF-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IF-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; RV64IF-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IF-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC1]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64IF-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT1]](s32)
+  ; RV64IF-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_mixed_with_int, csr_ilp32f_lp64f, implicit-def $x1, implicit $x10, implicit $f10_f, implicit-def $f10_f
+  ; RV64IF-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IF-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT2:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC2]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT2]](s32)
+  ; RV64IF-NEXT:   PseudoRET implicit $f10_f
+  ;
+  ; RV64IZFH-LABEL: name: caller_half_mixed_with_int
+  ; RV64IZFH: bb.1 (%ir-block.0):
+  ; RV64IZFH-NEXT:   liveins: $x10, $f10_h
+  ; RV64IZFH-NEXT: {{  $}}
+  ; RV64IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IZFH-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; RV64IZFH-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IZFH-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s32)
+  ; RV64IZFH-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY]](s16)
+  ; RV64IZFH-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_mixed_with_int, csr_ilp32f_lp64f, implicit-def $x1, implicit $x10, implicit $f10_h, implicit-def $f10_h
+  ; RV64IZFH-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IZFH-NEXT:   [[COPY2:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY2]](s16)
+  ; RV64IZFH-NEXT:   PseudoRET implicit $f10_h
   %y = call half @callee_half_mixed_with_int(i32 %x0, half %x)
   ret half %y
 }
@@ -232,6 +406,83 @@ define half @callee_half_return_stack1(i32 %v1, i32 %v2, i32 %v3, i32 %v4, i32 %
   ; RV32IZFH-NEXT:   [[COPY8:%[0-9]+]]:_(s16) = COPY $f10_h
   ; RV32IZFH-NEXT:   $f10_h = COPY [[COPY8]](s16)
   ; RV32IZFH-NEXT:   PseudoRET implicit $f10_h
+  ;
+  ; RV64I-LABEL: name: callee_half_return_stack1
+  ; RV64I: bb.1 (%ir-block.0):
+  ; RV64I-NEXT:   liveins: $x10, $x11, $x12, $x13, $x14, $x15, $x16, $x17
+  ; RV64I-NEXT: {{  $}}
+  ; RV64I-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64I-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+  ; RV64I-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; RV64I-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+  ; RV64I-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; RV64I-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x13
+  ; RV64I-NEXT:   [[TRUNC3:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; RV64I-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x14
+  ; RV64I-NEXT:   [[TRUNC4:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; RV64I-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x15
+  ; RV64I-NEXT:   [[TRUNC5:%[0-9]+]]:_(s32) = G_TRUNC [[COPY5]](s64)
+  ; RV64I-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x16
+  ; RV64I-NEXT:   [[TRUNC6:%[0-9]+]]:_(s32) = G_TRUNC [[COPY6]](s64)
+  ; RV64I-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x17
+  ; RV64I-NEXT:   [[TRUNC7:%[0-9]+]]:_(s32) = G_TRUNC [[COPY7]](s64)
+  ; RV64I-NEXT:   [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+  ; RV64I-NEXT:   [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s64) from %fixed-stack.0, align 16)
+  ; RV64I-NEXT:   [[TRUNC8:%[0-9]+]]:_(s16) = G_TRUNC [[LOAD]](s64)
+  ; RV64I-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC8]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64I-NEXT:   PseudoRET implicit $x10
+  ;
+  ; RV64IF-LABEL: name: callee_half_return_stack1
+  ; RV64IF: bb.1 (%ir-block.0):
+  ; RV64IF-NEXT:   liveins: $x10, $x11, $x12, $x13, $x14, $x15, $x16, $x17, $f10_f
+  ; RV64IF-NEXT: {{  $}}
+  ; RV64IF-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IF-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64IF-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+  ; RV64IF-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; RV64IF-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+  ; RV64IF-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; RV64IF-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x13
+  ; RV64IF-NEXT:   [[TRUNC3:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; RV64IF-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x14
+  ; RV64IF-NEXT:   [[TRUNC4:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; RV64IF-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x15
+  ; RV64IF-NEXT:   [[TRUNC5:%[0-9]+]]:_(s32) = G_TRUNC [[COPY5]](s64)
+  ; RV64IF-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x16
+  ; RV64IF-NEXT:   [[TRUNC6:%[0-9]+]]:_(s32) = G_TRUNC [[COPY6]](s64)
+  ; RV64IF-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x17
+  ; RV64IF-NEXT:   [[TRUNC7:%[0-9]+]]:_(s32) = G_TRUNC [[COPY7]](s64)
+  ; RV64IF-NEXT:   [[COPY8:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC8:%[0-9]+]]:_(s16) = G_TRUNC [[COPY8]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC8]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT]](s32)
+  ; RV64IF-NEXT:   PseudoRET implicit $f10_f
+  ;
+  ; RV64IZFH-LABEL: name: callee_half_return_stack1
+  ; RV64IZFH: bb.1 (%ir-block.0):
+  ; RV64IZFH-NEXT:   liveins: $x10, $x11, $x12, $x13, $x14, $x15, $x16, $x17, $f10_h
+  ; RV64IZFH-NEXT: {{  $}}
+  ; RV64IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IZFH-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+  ; RV64IZFH-NEXT:   [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s64)
+  ; RV64IZFH-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+  ; RV64IZFH-NEXT:   [[TRUNC2:%[0-9]+]]:_(s32) = G_TRUNC [[COPY2]](s64)
+  ; RV64IZFH-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x13
+  ; RV64IZFH-NEXT:   [[TRUNC3:%[0-9]+]]:_(s32) = G_TRUNC [[COPY3]](s64)
+  ; RV64IZFH-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x14
+  ; RV64IZFH-NEXT:   [[TRUNC4:%[0-9]+]]:_(s32) = G_TRUNC [[COPY4]](s64)
+  ; RV64IZFH-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x15
+  ; RV64IZFH-NEXT:   [[TRUNC5:%[0-9]+]]:_(s32) = G_TRUNC [[COPY5]](s64)
+  ; RV64IZFH-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x16
+  ; RV64IZFH-NEXT:   [[TRUNC6:%[0-9]+]]:_(s32) = G_TRUNC [[COPY6]](s64)
+  ; RV64IZFH-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x17
+  ; RV64IZFH-NEXT:   [[TRUNC7:%[0-9]+]]:_(s32) = G_TRUNC [[COPY7]](s64)
+  ; RV64IZFH-NEXT:   [[COPY8:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY8]](s16)
+  ; RV64IZFH-NEXT:   PseudoRET implicit $f10_h
   ret half %x
 }
 
@@ -333,6 +584,131 @@ define half @caller_half_return_stack1(i32 %v1, half %x) nounwind {
   ; RV32IZFH-NEXT:   [[COPY2:%[0-9]+]]:_(s16) = COPY $f10_h
   ; RV32IZFH-NEXT:   $f10_h = COPY [[COPY2]](s16)
   ; RV32IZFH-NEXT:   PseudoRET implicit $f10_h
+  ;
+  ; RV64I-LABEL: name: caller_half_return_stack1
+  ; RV64I: bb.1 (%ir-block.0):
+  ; RV64I-NEXT:   liveins: $x10, $x11
+  ; RV64I-NEXT: {{  $}}
+  ; RV64I-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64I-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+  ; RV64I-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s64)
+  ; RV64I-NEXT:   [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
+  ; RV64I-NEXT:   [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+  ; RV64I-NEXT:   [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
+  ; RV64I-NEXT:   [[C3:%[0-9]+]]:_(s32) = G_CONSTANT i32 5
+  ; RV64I-NEXT:   [[C4:%[0-9]+]]:_(s32) = G_CONSTANT i32 6
+  ; RV64I-NEXT:   [[C5:%[0-9]+]]:_(s32) = G_CONSTANT i32 7
+  ; RV64I-NEXT:   [[C6:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+  ; RV64I-NEXT:   ADJCALLSTACKDOWN 8, 0, implicit-def $x2, implicit $x2
+  ; RV64I-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[C]](s32)
+  ; RV64I-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s64) = G_ANYEXT [[C1]](s32)
+  ; RV64I-NEXT:   [[ANYEXT2:%[0-9]+]]:_(s64) = G_ANYEXT [[C2]](s32)
+  ; RV64I-NEXT:   [[ANYEXT3:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s32)
+  ; RV64I-NEXT:   [[ANYEXT4:%[0-9]+]]:_(s64) = G_ANYEXT [[C3]](s32)
+  ; RV64I-NEXT:   [[ANYEXT5:%[0-9]+]]:_(s64) = G_ANYEXT [[C4]](s32)
+  ; RV64I-NEXT:   [[ANYEXT6:%[0-9]+]]:_(s64) = G_ANYEXT [[C5]](s32)
+  ; RV64I-NEXT:   [[ANYEXT7:%[0-9]+]]:_(s64) = G_ANYEXT [[C6]](s32)
+  ; RV64I-NEXT:   [[ANYEXT8:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64I-NEXT:   [[COPY2:%[0-9]+]]:_(p0) = COPY $x2
+  ; RV64I-NEXT:   [[C7:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
+  ; RV64I-NEXT:   [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[COPY2]], [[C7]](s64)
+  ; RV64I-NEXT:   G_STORE [[ANYEXT8]](s64), [[PTR_ADD]](p0) :: (store (s64) into stack, align 16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64I-NEXT:   $x11 = COPY [[ANYEXT1]](s64)
+  ; RV64I-NEXT:   $x12 = COPY [[ANYEXT2]](s64)
+  ; RV64I-NEXT:   $x13 = COPY [[ANYEXT3]](s64)
+  ; RV64I-NEXT:   $x14 = COPY [[ANYEXT4]](s64)
+  ; RV64I-NEXT:   $x15 = COPY [[ANYEXT5]](s64)
+  ; RV64I-NEXT:   $x16 = COPY [[ANYEXT6]](s64)
+  ; RV64I-NEXT:   $x17 = COPY [[ANYEXT7]](s64)
+  ; RV64I-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_return_stack1, csr_ilp32_lp64, implicit-def $x1, implicit $x10, implicit $x11, implicit $x12, implicit $x13, implicit $x14, implicit $x15, implicit $x16, implicit $x17, implicit-def $x10
+  ; RV64I-NEXT:   ADJCALLSTACKUP 8, 0, implicit-def $x2, implicit $x2
+  ; RV64I-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s64)
+  ; RV64I-NEXT:   [[ANYEXT9:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC2]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT9]](s64)
+  ; RV64I-NEXT:   PseudoRET implicit $x10
+  ;
+  ; RV64IF-LABEL: name: caller_half_return_stack1
+  ; RV64IF: bb.1 (%ir-block.0):
+  ; RV64IF-NEXT:   liveins: $x10, $f10_f
+  ; RV64IF-NEXT: {{  $}}
+  ; RV64IF-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IF-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64IF-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+  ; RV64IF-NEXT:   [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
+  ; RV64IF-NEXT:   [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+  ; RV64IF-NEXT:   [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
+  ; RV64IF-NEXT:   [[C3:%[0-9]+]]:_(s32) = G_CONSTANT i32 5
+  ; RV64IF-NEXT:   [[C4:%[0-9]+]]:_(s32) = G_CONSTANT i32 6
+  ; RV64IF-NEXT:   [[C5:%[0-9]+]]:_(s32) = G_CONSTANT i32 7
+  ; RV64IF-NEXT:   [[C6:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+  ; RV64IF-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IF-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[C]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s64) = G_ANYEXT [[C1]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT2:%[0-9]+]]:_(s64) = G_ANYEXT [[C2]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT3:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT4:%[0-9]+]]:_(s64) = G_ANYEXT [[C3]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT5:%[0-9]+]]:_(s64) = G_ANYEXT [[C4]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT6:%[0-9]+]]:_(s64) = G_ANYEXT [[C5]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT7:%[0-9]+]]:_(s64) = G_ANYEXT [[C6]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT8:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64IF-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64IF-NEXT:   $x11 = COPY [[ANYEXT1]](s64)
+  ; RV64IF-NEXT:   $x12 = COPY [[ANYEXT2]](s64)
+  ; RV64IF-NEXT:   $x13 = COPY [[ANYEXT3]](s64)
+  ; RV64IF-NEXT:   $x14 = COPY [[ANYEXT4]](s64)
+  ; RV64IF-NEXT:   $x15 = COPY [[ANYEXT5]](s64)
+  ; RV64IF-NEXT:   $x16 = COPY [[ANYEXT6]](s64)
+  ; RV64IF-NEXT:   $x17 = COPY [[ANYEXT7]](s64)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT8]](s32)
+  ; RV64IF-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_return_stack1, csr_ilp32f_lp64f, implicit-def $x1, implicit $x10, implicit $x11, implicit $x12, implicit $x13, implicit $x14, implicit $x15, implicit $x16, implicit $x17, implicit $f10_f, implicit-def $f10_f
+  ; RV64IF-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IF-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT9:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC2]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT9]](s32)
+  ; RV64IF-NEXT:   PseudoRET implicit $f10_f
+  ;
+  ; RV64IZFH-LABEL: name: caller_half_return_stack1
+  ; RV64IZFH: bb.1 (%ir-block.0):
+  ; RV64IZFH-NEXT:   liveins: $x10, $f10_h
+  ; RV64IZFH-NEXT: {{  $}}
+  ; RV64IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IZFH-NEXT:   [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+  ; RV64IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
+  ; RV64IZFH-NEXT:   [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+  ; RV64IZFH-NEXT:   [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
+  ; RV64IZFH-NEXT:   [[C3:%[0-9]+]]:_(s32) = G_CONSTANT i32 5
+  ; RV64IZFH-NEXT:   [[C4:%[0-9]+]]:_(s32) = G_CONSTANT i32 6
+  ; RV64IZFH-NEXT:   [[C5:%[0-9]+]]:_(s32) = G_CONSTANT i32 7
+  ; RV64IZFH-NEXT:   [[C6:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+  ; RV64IZFH-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IZFH-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[C]](s32)
+  ; RV64IZFH-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s64) = G_ANYEXT [[C1]](s32)
+  ; RV64IZFH-NEXT:   [[ANYEXT2:%[0-9]+]]:_(s64) = G_ANYEXT [[C2]](s32)
+  ; RV64IZFH-NEXT:   [[ANYEXT3:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s32)
+  ; RV64IZFH-NEXT:   [[ANYEXT4:%[0-9]+]]:_(s64) = G_ANYEXT [[C3]](s32)
+  ; RV64IZFH-NEXT:   [[ANYEXT5:%[0-9]+]]:_(s64) = G_ANYEXT [[C4]](s32)
+  ; RV64IZFH-NEXT:   [[ANYEXT6:%[0-9]+]]:_(s64) = G_ANYEXT [[C5]](s32)
+  ; RV64IZFH-NEXT:   [[ANYEXT7:%[0-9]+]]:_(s64) = G_ANYEXT [[C6]](s32)
+  ; RV64IZFH-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64IZFH-NEXT:   $x11 = COPY [[ANYEXT1]](s64)
+  ; RV64IZFH-NEXT:   $x12 = COPY [[ANYEXT2]](s64)
+  ; RV64IZFH-NEXT:   $x13 = COPY [[ANYEXT3]](s64)
+  ; RV64IZFH-NEXT:   $x14 = COPY [[ANYEXT4]](s64)
+  ; RV64IZFH-NEXT:   $x15 = COPY [[ANYEXT5]](s64)
+  ; RV64IZFH-NEXT:   $x16 = COPY [[ANYEXT6]](s64)
+  ; RV64IZFH-NEXT:   $x17 = COPY [[ANYEXT7]](s64)
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY1]](s16)
+  ; RV64IZFH-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_return_stack1, csr_ilp32f_lp64f, implicit-def $x1, implicit $x10, implicit $x11, implicit $x12, implicit $x13, implicit $x14, implicit $x15, implicit $x16, implicit $x17, implicit $f10_h, implicit-def $f10_h
+  ; RV64IZFH-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IZFH-NEXT:   [[COPY2:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY2]](s16)
+  ; RV64IZFH-NEXT:   PseudoRET implicit $f10_h
   %y = call half @callee_half_return_stack1(i32 0, i32 1, i32 2, i32 %v1, i32 5, i32 6, i32 7, i32 8, half %x)
   ret half %y
 }
@@ -407,6 +783,76 @@ define half @callee_half_return_stack2(half %v1, half %v2, half %v3, half %v4, h
   ; RV32IZFH-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY8]](s32)
   ; RV32IZFH-NEXT:   $f10_h = COPY [[TRUNC]](s16)
   ; RV32IZFH-NEXT:   PseudoRET implicit $f10_h
+  ;
+  ; RV64I-LABEL: name: callee_half_return_stack2
+  ; RV64I: bb.1 (%ir-block.0):
+  ; RV64I-NEXT:   liveins: $x10, $x11, $x12, $x13, $x14, $x15, $x16, $x17
+  ; RV64I-NEXT: {{  $}}
+  ; RV64I-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s64)
+  ; RV64I-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+  ; RV64I-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s64)
+  ; RV64I-NEXT:   [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+  ; RV64I-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s64)
+  ; RV64I-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x13
+  ; RV64I-NEXT:   [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s64)
+  ; RV64I-NEXT:   [[COPY4:%[0-9]+]]:_(s64) = COPY $x14
+  ; RV64I-NEXT:   [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[COPY4]](s64)
+  ; RV64I-NEXT:   [[COPY5:%[0-9]+]]:_(s64) = COPY $x15
+  ; RV64I-NEXT:   [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[COPY5]](s64)
+  ; RV64I-NEXT:   [[COPY6:%[0-9]+]]:_(s64) = COPY $x16
+  ; RV64I-NEXT:   [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[COPY6]](s64)
+  ; RV64I-NEXT:   [[COPY7:%[0-9]+]]:_(s64) = COPY $x17
+  ; RV64I-NEXT:   [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[COPY7]](s64)
+  ; RV64I-NEXT:   [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+  ; RV64I-NEXT:   [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s64) from %fixed-stack.0, align 16)
+  ; RV64I-NEXT:   [[TRUNC8:%[0-9]+]]:_(s16) = G_TRUNC [[LOAD]](s64)
+  ; RV64I-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC8]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64I-NEXT:   PseudoRET implicit $x10
+  ;
+  ; RV64IF-LABEL: name: callee_half_return_stack2
+  ; RV64IF: bb.1 (%ir-block.0):
+  ; RV64IF-NEXT:   liveins: $x10, $f10_f, $f11_f, $f12_f, $f13_f, $f14_f, $f15_f, $f16_f, $f17_f
+  ; RV64IF-NEXT: {{  $}}
+  ; RV64IF-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+  ; RV64IF-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f11_f
+  ; RV64IF-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+  ; RV64IF-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY $f12_f
+  ; RV64IF-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+  ; RV64IF-NEXT:   [[COPY3:%[0-9]+]]:_(s32) = COPY $f13_f
+  ; RV64IF-NEXT:   [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s32)
+  ; RV64IF-NEXT:   [[COPY4:%[0-9]+]]:_(s32) = COPY $f14_f
+  ; RV64IF-NEXT:   [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[COPY4]](s32)
+  ; RV64IF-NEXT:   [[COPY5:%[0-9]+]]:_(s32) = COPY $f15_f
+  ; RV64IF-NEXT:   [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[COPY5]](s32)
+  ; RV64IF-NEXT:   [[COPY6:%[0-9]+]]:_(s32) = COPY $f16_f
+  ; RV64IF-NEXT:   [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[COPY6]](s32)
+  ; RV64IF-NEXT:   [[COPY7:%[0-9]+]]:_(s32) = COPY $f17_f
+  ; RV64IF-NEXT:   [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[COPY7]](s32)
+  ; RV64IF-NEXT:   [[COPY8:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IF-NEXT:   [[TRUNC8:%[0-9]+]]:_(s16) = G_TRUNC [[COPY8]](s64)
+  ; RV64IF-NEXT:   [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC8]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT]](s32)
+  ; RV64IF-NEXT:   PseudoRET implicit $f10_f
+  ;
+  ; RV64IZFH-LABEL: name: callee_half_return_stack2
+  ; RV64IZFH: bb.1 (%ir-block.0):
+  ; RV64IZFH-NEXT:   liveins: $x10, $f10_h, $f11_h, $f12_h, $f13_h, $f14_h, $f15_h, $f16_h, $f17_h
+  ; RV64IZFH-NEXT: {{  $}}
+  ; RV64IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s16) = COPY $f11_h
+  ; RV64IZFH-NEXT:   [[COPY2:%[0-9]+]]:_(s16) = COPY $f12_h
+  ; RV64IZFH-NEXT:   [[COPY3:%[0-9]+]]:_(s16) = COPY $f13_h
+  ; RV64IZFH-NEXT:   [[COPY4:%[0-9]+]]:_(s16) = COPY $f14_h
+  ; RV64IZFH-NEXT:   [[COPY5:%[0-9]+]]:_(s16) = COPY $f15_h
+  ; RV64IZFH-NEXT:   [[COPY6:%[0-9]+]]:_(s16) = COPY $f16_h
+  ; RV64IZFH-NEXT:   [[COPY7:%[0-9]+]]:_(s16) = COPY $f17_h
+  ; RV64IZFH-NEXT:   [[COPY8:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64IZFH-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY8]](s64)
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[TRUNC]](s16)
+  ; RV64IZFH-NEXT:   PseudoRET implicit $f10_h
   ret half %x
 }
 
@@ -505,12 +951,116 @@ define half @caller_half_return_stack2(half %x, half %y) nounwind {
   ; RV32IZFH-NEXT:   $f15_h = COPY [[COPY1]](s16)
   ; RV32IZFH-NEXT:   $f16_h = COPY [[COPY1]](s16)
   ; RV32IZFH-NEXT:   $f17_h = COPY [[COPY1]](s16)
-  ; RV32IZFH-NEXT:   $x10 = COPY [[COPY]](s16)
+  ; RV32IZFH-NEXT:   [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[COPY]](s16)
+  ; RV32IZFH-NEXT:   $x10 = COPY [[ANYEXT]](s32)
   ; RV32IZFH-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_return_stack2, csr_ilp32f_lp64f, implicit-def $x1, implicit $f10_h, implicit $f11_h, implicit $f12_h, implicit $f13_h, implicit $f14_h, implicit $f15_h, implicit $f16_h, implicit $f17_h, implicit $x10, implicit-def $f10_h
   ; RV32IZFH-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
   ; RV32IZFH-NEXT:   [[COPY2:%[0-9]+]]:_(s16) = COPY $f10_h
   ; RV32IZFH-NEXT:   $f10_h = COPY [[COPY2]](s16)
   ; RV32IZFH-NEXT:   PseudoRET implicit $f10_h
+  ;
+  ; RV64I-LABEL: name: caller_half_return_stack2
+  ; RV64I: bb.1 (%ir-block.0):
+  ; RV64I-NEXT:   liveins: $x10, $x11
+  ; RV64I-NEXT: {{  $}}
+  ; RV64I-NEXT:   [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s64)
+  ; RV64I-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+  ; RV64I-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s64)
+  ; RV64I-NEXT:   [[C:%[0-9]+]]:_(s16) = G_FCONSTANT half 0xH3C00
+  ; RV64I-NEXT:   [[C1:%[0-9]+]]:_(s16) = G_FCONSTANT half 0xH4200
+  ; RV64I-NEXT:   ADJCALLSTACKDOWN 8, 0, implicit-def $x2, implicit $x2
+  ; RV64I-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64I-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s64) = G_ANYEXT [[C]](s16)
+  ; RV64I-NEXT:   [[ANYEXT2:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64I-NEXT:   [[ANYEXT3:%[0-9]+]]:_(s64) = G_ANYEXT [[C1]](s16)
+  ; RV64I-NEXT:   [[ANYEXT4:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64I-NEXT:   [[ANYEXT5:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64I-NEXT:   [[ANYEXT6:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64I-NEXT:   [[ANYEXT7:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64I-NEXT:   [[ANYEXT8:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64I-NEXT:   [[COPY2:%[0-9]+]]:_(p0) = COPY $x2
+  ; RV64I-NEXT:   [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
+  ; RV64I-NEXT:   [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[COPY2]], [[C2]](s64)
+  ; RV64I-NEXT:   G_STORE [[ANYEXT8]](s64), [[PTR_ADD]](p0) :: (store (s64) into stack, align 16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64I-NEXT:   $x11 = COPY [[ANYEXT1]](s64)
+  ; RV64I-NEXT:   $x12 = COPY [[ANYEXT2]](s64)
+  ; RV64I-NEXT:   $x13 = COPY [[ANYEXT3]](s64)
+  ; RV64I-NEXT:   $x14 = COPY [[ANYEXT4]](s64)
+  ; RV64I-NEXT:   $x15 = COPY [[ANYEXT5]](s64)
+  ; RV64I-NEXT:   $x16 = COPY [[ANYEXT6]](s64)
+  ; RV64I-NEXT:   $x17 = COPY [[ANYEXT7]](s64)
+  ; RV64I-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_return_stack2, csr_ilp32_lp64, implicit-def $x1, implicit $x10, implicit $x11, implicit $x12, implicit $x13, implicit $x14, implicit $x15, implicit $x16, implicit $x17, implicit-def $x10
+  ; RV64I-NEXT:   ADJCALLSTACKUP 8, 0, implicit-def $x2, implicit $x2
+  ; RV64I-NEXT:   [[COPY3:%[0-9]+]]:_(s64) = COPY $x10
+  ; RV64I-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s64)
+  ; RV64I-NEXT:   [[ANYEXT9:%[0-9]+]]:_(s64) = G_ANYEXT [[TRUNC2]](s16)
+  ; RV64I-NEXT:   $x10 = COPY [[ANYEXT9]](s64)
+  ; RV64I-NEXT:   PseudoRET implicit $x10
+  ;
+  ; RV64IF-LABEL: name: caller_half_return_stack2
+  ; RV64IF: bb.1 (%ir-block.0):
+  ; RV64IF-NEXT:   liveins: $f10_f, $f11_f
+  ; RV64IF-NEXT: {{  $}}
+  ; RV64IF-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+  ; RV64IF-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $f11_f
+  ; RV64IF-NEXT:   [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+  ; RV64IF-NEXT:   [[C:%[0-9]+]]:_(s16) = G_FCONSTANT half 0xH3C00
+  ; RV64IF-NEXT:   [[C1:%[0-9]+]]:_(s16) = G_FCONSTANT half 0xH4200
+  ; RV64IF-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IF-NEXT:   [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64IF-NEXT:   [[ANYEXT1:%[0-9]+]]:_(s32) = G_ANYEXT [[C]](s16)
+  ; RV64IF-NEXT:   [[ANYEXT2:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64IF-NEXT:   [[ANYEXT3:%[0-9]+]]:_(s32) = G_ANYEXT [[C1]](s16)
+  ; RV64IF-NEXT:   [[ANYEXT4:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64IF-NEXT:   [[ANYEXT5:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64IF-NEXT:   [[ANYEXT6:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64IF-NEXT:   [[ANYEXT7:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC1]](s16)
+  ; RV64IF-NEXT:   [[ANYEXT8:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT]](s32)
+  ; RV64IF-NEXT:   $f11_f = COPY [[ANYEXT1]](s32)
+  ; RV64IF-NEXT:   $f12_f = COPY [[ANYEXT2]](s32)
+  ; RV64IF-NEXT:   $f13_f = COPY [[ANYEXT3]](s32)
+  ; RV64IF-NEXT:   $f14_f = COPY [[ANYEXT4]](s32)
+  ; RV64IF-NEXT:   $f15_f = COPY [[ANYEXT5]](s32)
+  ; RV64IF-NEXT:   $f16_f = COPY [[ANYEXT6]](s32)
+  ; RV64IF-NEXT:   $f17_f = COPY [[ANYEXT7]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT9:%[0-9]+]]:_(s64) = G_ANYEXT [[ANYEXT8]](s32)
+  ; RV64IF-NEXT:   $x10 = COPY [[ANYEXT9]](s64)
+  ; RV64IF-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_return_stack2, csr_ilp32f_lp64f, implicit-def $x1, implicit $f10_f, implicit $f11_f, implicit $f12_f, implicit $f13_f, implicit $f14_f, implicit $f15_f, implicit $f16_f, implicit $f17_f, implicit $x10, implicit-def $f10_f
+  ; RV64IF-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IF-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY $f10_f
+  ; RV64IF-NEXT:   [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+  ; RV64IF-NEXT:   [[ANYEXT10:%[0-9]+]]:_(s32) = G_ANYEXT [[TRUNC2]](s16)
+  ; RV64IF-NEXT:   $f10_f = COPY [[ANYEXT10]](s32)
+  ; RV64IF-NEXT:   PseudoRET implicit $f10_f
+  ;
+  ; RV64IZFH-LABEL: name: caller_half_return_stack2
+  ; RV64IZFH: bb.1 (%ir-block.0):
+  ; RV64IZFH-NEXT:   liveins: $f10_h, $f11_h
+  ; RV64IZFH-NEXT: {{  $}}
+  ; RV64IZFH-NEXT:   [[COPY:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   [[COPY1:%[0-9]+]]:_(s16) = COPY $f11_h
+  ; RV64IZFH-NEXT:   [[C:%[0-9]+]]:_(s16) = G_FCONSTANT half 0xH3C00
+  ; RV64IZFH-NEXT:   [[C1:%[0-9]+]]:_(s16) = G_FCONSTANT half 0xH4200
+  ; RV64IZFH-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY]](s16)
+  ; RV64IZFH-NEXT:   $f11_h = COPY [[C]](s16)
+  ; RV64IZFH-NEXT:   $f12_h = COPY [[COPY]](s16)
+  ; RV64IZFH-NEXT:   $f13_h = COPY [[C1]](s16)
+  ; RV64IZFH-NEXT:   $f14_h = COPY [[COPY]](s16)
+  ; RV64IZFH-NEXT:   $f15_h = COPY [[COPY1]](s16)
+  ; RV64IZFH-NEXT:   $f16_h = COPY [[COPY1]](s16)
+  ; RV64IZFH-NEXT:   $f17_h = COPY [[COPY1]](s16)
+  ; RV64IZFH-NEXT:   [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[COPY]](s16)
+  ; RV64IZFH-NEXT:   $x10 = COPY [[ANYEXT]](s64)
+  ; RV64IZFH-NEXT:   PseudoCALL target-flags(riscv-call) @callee_half_return_stack2, csr_ilp32f_lp64f, implicit-def $x1, implicit $f10_h, implicit $f11_h, implicit $f12_h, implicit $f13_h, implicit $f14_h, implicit $f15_h, implicit $f16_h, implicit $f17_h, implicit $x10, implicit-def $f10_h
+  ; RV64IZFH-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $x2, implicit $x2
+  ; RV64IZFH-NEXT:   [[COPY2:%[0-9]+]]:_(s16) = COPY $f10_h
+  ; RV64IZFH-NEXT:   $f10_h = COPY [[COPY2]](s16)
+  ; RV64IZFH-NEXT:   PseudoRET implicit $f10_h
   %z = call half @callee_half_return_stack2(half %x, half 1.0, half %x, half 3.0, half %x, half %y, half %y, half %y, half %x)
   ret half %z
 }