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2f75daf38f
PHIElimination may insert copy instructions in multiple basic blocks. Moving debug locations across basic block boundaries would be misleading as illustrated by the test case. rdar://75463656 Differential Revision: https://reviews.llvm.org/D100886
42 lines
1.3 KiB
YAML
42 lines
1.3 KiB
YAML
# RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs -o - %s \
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# RUN: -run-pass=livevars,phi-node-elimination,twoaddressinstruction \
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# RUN: -no-phi-elim-live-out-early-exit=1 -phi-elim-split-all-critical-edges=1 \
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# RUN: | FileCheck %s
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--- |
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define void @test() !dbg !7 {
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entry:
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ret void, !dbg !14
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "Adrian", emissionKind: FullDebug)
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!1 = !DIFile(filename: "/tmp/t.c", directory: "/")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 2}
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!4 = !{i32 2, !"Debug Info Version", i32 4}
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!5 = !{i32 1, !"PIC Level", i32 2}
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!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
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!8 = !DISubroutineType(types: !{})
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!14 = !DILocation(line: 1, column: 0, scope: !7)
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---
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name: test
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $nzcv, $wzr
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Bcc 8, %bb.2, implicit $nzcv
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; CHECK-LABEL: bb.1:
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bb.1:
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%x:gpr32 = COPY $wzr
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; Test that the debug location is not copied into bb1!
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; CHECK: %3:gpr32 = COPY killed %x{{$}}
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; CHECK-LABEL: bb.2:
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bb.2:
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%y:gpr32 = PHI %x:gpr32, %bb.1, undef %undef:gpr32, %bb.0, debug-location !14
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$wzr = COPY %y:gpr32
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...
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