62 lines
2.1 KiB
Text
62 lines
2.1 KiB
Text
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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-coalescing -run-pass=register-coalescer -o - %s | FileCheck %s
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# %2 has an undef read in %bb.3, and this IR wouldn't be valid if it
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# was a real read. After merging %2 into %0, we need to replace the
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# copy of undef with an implicit_def since the copy introduced a new
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# value.
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---
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name: coalesce_into_undef_copy
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tracksRegLiveness: true
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machineFunctionInfo:
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scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
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stackPtrOffsetReg: '$sgpr32'
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body: |
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; CHECK-LABEL: name: coalesce_into_undef_copy
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; CHECK: bb.0:
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; CHECK-NEXT: successors: %bb.1(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: [[COPY:%[0-9]+]]:vreg_128_align2 = COPY undef %1:sgpr_128, implicit $exec
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; CHECK-NEXT: S_BRANCH %bb.1
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.1:
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; CHECK-NEXT: successors: %bb.2(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: dead %2:vreg_128_align2 = IMPLICIT_DEF
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; CHECK-NEXT: [[COPY]].sub0:vreg_128_align2 = IMPLICIT_DEF
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.2:
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; CHECK-NEXT: successors: %bb.2(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: dead %4:vgpr_32 = V_INDIRECT_REG_READ_GPR_IDX_B32_V4 [[COPY]], undef %5:sgpr_32, 11, implicit-def $m0, implicit $m0, implicit $exec
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; CHECK-NEXT: S_BRANCH %bb.2
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.3:
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; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.4(0x40000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: [[DEF:%[0-9]+]]:vreg_128_align2 = IMPLICIT_DEF
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; CHECK-NEXT: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.4:
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bb.0:
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%0:vreg_128_align2 = COPY undef %1:sgpr_128, implicit $exec
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S_BRANCH %bb.1
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bb.1:
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%2:vreg_128_align2 = IMPLICIT_DEF
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%3:vreg_128_align2 = COPY killed %0
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%3.sub0:vreg_128_align2 = IMPLICIT_DEF
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bb.2:
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dead %5:vgpr_32 = V_INDIRECT_REG_READ_GPR_IDX_B32_V4 %3, undef %6:sgpr_32, 11, implicit-def $m0, implicit $m0, implicit $exec
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S_BRANCH %bb.2
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bb.3:
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%0:vreg_128_align2 = COPY undef %2
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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bb.4:
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...
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