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SystemZ: Handle copies between gr64 and fp64 #124890

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Merged
arsenm merged 1 commit into from
Jan 30, 2025
+101 −0
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SystemZ: Handle copies between gr64 and fp64 #124890

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6 changes: 6 additions & 0 deletions llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -983,6 +983,12 @@ void SystemZInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
Opcode = SystemZ::VLR;
else if (SystemZ::AR32BitRegClass.contains(DestReg, SrcReg))
Opcode = SystemZ::CPYA;
else if (SystemZ::GR64BitRegClass.contains(DestReg) &&
SystemZ::FP64BitRegClass.contains(SrcReg))
Opcode = SystemZ::LGDR;
else if (SystemZ::FP64BitRegClass.contains(DestReg) &&
SystemZ::GR64BitRegClass.contains(SrcReg))
Opcode = SystemZ::LDGR;
else
llvm_unreachable("Impossible reg-to-reg copy");

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48 changes: 48 additions & 0 deletions llvm/test/CodeGen/SystemZ/copy-phys-reg-fp64-to-gr64.mir
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Original file line number Diff line number Diff line change
@@ -0,0 +1,48 @@
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 4
# RUN: llc -mtriple=s390x-ibm-linux -mcpu=z13 -run-pass=postrapseudos -o - %s | FileCheck %s

---
name: copy_fp64_to_gr64__r1d_to_f3d
tracksRegLiveness: true
body: |
bb.0:
liveins: $r1d
; CHECK-LABEL: name: copy_fp64_to_gr64__r1d_to_f3d
; CHECK: liveins: $r1d
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $f3d = LDGR $r1d
; CHECK-NEXT: Return implicit $f3d
$f3d = COPY $r1d
Return implicit $f3d
...

---
name: copy_fp64_to_gr64__r1d_to_f3d_undef
tracksRegLiveness: true
body: |
bb.0:
liveins: $r1d
; CHECK-LABEL: name: copy_fp64_to_gr64__r1d_to_f3d_undef
; CHECK: liveins: $r1d
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $f3d = KILL undef $r1d
; CHECK-NEXT: Return implicit $f3d
$f3d = COPY undef $r1d
Return implicit $f3d
...

---
name: copy_fp64_to_gr64__r1d_to_f3d_killed
tracksRegLiveness: true
body: |
bb.0:
liveins: $r1d
; CHECK-LABEL: name: copy_fp64_to_gr64__r1d_to_f3d_killed
; CHECK: liveins: $r1d
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $f3d = LDGR killed $r1d
; CHECK-NEXT: Return implicit $f3d
$f3d = COPY killed $r1d
Return implicit $f3d
...

47 changes: 47 additions & 0 deletions llvm/test/CodeGen/SystemZ/copy-phys-reg-gr64-to-fp64.mir
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@@ -0,0 +1,47 @@
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 4
# RUN: llc -mtriple=s390x-ibm-linux -mcpu=z13 -run-pass=postrapseudos -o - %s | FileCheck %s
---
name: copy_fp64_to_gr64__f3d_to_r1d
tracksRegLiveness: true
body: |
bb.0:
liveins: $f3d
; CHECK-LABEL: name: copy_fp64_to_gr64__f3d_to_r1d
; CHECK: liveins: $f3d
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $r1d = LGDR $f3d
; CHECK-NEXT: Return implicit $r1d
$r1d = COPY $f3d
Return implicit $r1d
...

---
name: copy_fp64_to_gr64__f3d_to_r1d_undef
tracksRegLiveness: true
body: |
bb.0:
liveins: $f3d
; CHECK-LABEL: name: copy_fp64_to_gr64__f3d_to_r1d_undef
; CHECK: liveins: $f3d
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $r1d = KILL undef $f3d
; CHECK-NEXT: Return implicit $r1d
$r1d = COPY undef $f3d
Return implicit $r1d
...

---
name: copy_fp64_to_gr64__f3d_to_r1d_killed
tracksRegLiveness: true
body: |
bb.0:
liveins: $f3d
; CHECK-LABEL: name: copy_fp64_to_gr64__f3d_to_r1d_killed
; CHECK: liveins: $f3d
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $r1d = LGDR killed $f3d
; CHECK-NEXT: Return implicit $r1d
$r1d = COPY killed $f3d
Return implicit $r1d
...