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# RUN: llc -mtriple=x86_64-- -run-pass=peephole-opt %s -o - | FileCheck %s
--- |
define void @func() { ret void }
...
---
# Check that instructions with MI.isBitcast() are only replaced by COPY if there
# are no SUBREG_TO_REG users.
# CHECK-LABEL: name: func
name: func
registers:
- { id: 0, class: gr32 }
- { id: 1, class: fr32 }
- { id: 2, class: gr32 }
- { id: 3, class: gr32 }
- { id: 4, class: fr32 }
- { id: 5, class: gr32 }
- { id: 6, class: gr64 }
body: |
bb.0:
; CHECK: %1:fr32 = VMOVDI2SSrr %0
; CHECK: %7:gr32 = COPY %0
; CHECK: NOOP implicit %7
%0 = MOV32ri 42
%1 = VMOVDI2SSrr %0
%2 = MOVSS2DIrr %1
NOOP implicit %2
; CHECK: %4:fr32 = VMOVDI2SSrr %3
; CHECK-NOT: COPY
; CHECK: %5:gr32 = MOVSS2DIrr %4
; CHECK: %6:gr64 = SUBREG_TO_REG %5, 0
; CHECK: NOOP implicit %6
%3 = MOV32ri 42
%4 = VMOVDI2SSrr %3
%5 = MOVSS2DIrr %4
%6 = SUBREG_TO_REG %5, 0, %subreg.sub_32bit
NOOP implicit %6
...
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