derek.holloway
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76 lines
2.3 KiB
YAML
76 lines
2.3 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
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# RUN: llc -mtriple=x86_64-unknown-linux -run-pass=livevars,phi-node-elimination \
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# RUN: -verify-machineinstrs -o - %s | FileCheck %s
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# Test that PHI Elimination correctly clears LiveVariables AliveBlocks for
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# registers defined by IMPLICIT_DEF when used as PHI sources. The source
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# register %2 is live-through bb.2 to reach the PHI in bb.3. Without the fix,
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# MachineVerifier reports:
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# "LiveVariables: Block should not be in AliveBlocks"
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---
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name: phi_elim_undef_source
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: phi_elim_undef_source
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; CHECK: bb.0:
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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: [[MOV32r0_:%[0-9]+]]:gr32 = MOV32r0 implicit-def dead $eflags
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; CHECK-NEXT: TEST32rr killed [[MOV32r0_]], [[MOV32r0_]], implicit-def $eflags
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; CHECK-NEXT: JCC_1 %bb.4, 4, implicit killed $eflags
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; CHECK-NEXT: JMP_1 %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: JMP_1 %bb.2
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.2:
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; CHECK-NEXT: successors: %bb.3(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: [[DEF:%[0-9]+]]:vr128 = IMPLICIT_DEF
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; CHECK-NEXT: JMP_1 %bb.3
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.3:
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; CHECK-NEXT: [[COPY:%[0-9]+]]:vr128 = COPY killed [[DEF]]
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; CHECK-NEXT: $xmm0 = COPY killed [[COPY]]
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; CHECK-NEXT: RET 0, implicit killed $xmm0
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.4:
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; CHECK-NEXT: successors: %bb.3(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: [[V_SET0_:%[0-9]+]]:vr128 = V_SET0
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; CHECK-NEXT: [[DEF:%[0-9]+]]:vr128 = COPY killed [[V_SET0_]]
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; CHECK-NEXT: JMP_1 %bb.3
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bb.0:
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successors: %bb.1, %bb.4
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%0:gr32 = MOV32r0 implicit-def dead $eflags
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TEST32rr %0, %0, implicit-def $eflags
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JCC_1 %bb.4, 4, implicit $eflags
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JMP_1 %bb.1
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bb.1:
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successors: %bb.2
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%1:vr128 = IMPLICIT_DEF
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JMP_1 %bb.2
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bb.2:
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successors: %bb.3
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JMP_1 %bb.3
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bb.3:
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%3:vr128 = PHI %1, %bb.2, %2, %bb.4
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$xmm0 = COPY %3
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RET 0, implicit $xmm0
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bb.4:
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successors: %bb.3
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%2:vr128 = V_SET0
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JMP_1 %bb.3
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...
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