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bb3b320019
Summary: This allows us to test each backend pass under the presence of debug info using pre-existing tests. The tests should not fail as a result of this so long as it's true that debug info does not affect CodeGen. In practice, a few tests are sensitive to this: * Tests that check the pass structure (e.g. O0-pipeline.ll) * Tests that check --debug output. Specifically instruction dumps containing MMO's (e.g. prelegalizercombiner-extends.ll) * Tests that contain debugify metadata as mir-strip-debug will remove it (e.g. fastisel-debugvalue-undef.ll) * Tests with partial debug info (e.g. patchable-function-entry-empty.mir had debug info but no !llvm.dbg.cu) * Tests that check optimization remarks overly strictly (e.g. prologue-epilogue-remarks.mir) * Tests that would inject the pass in an unsafe region (e.g. seqpairspill.mir would inject between register alloc and virt reg rewriter) In all cases, the checks can either be updated or --debugify-and-strip-all-safe=0 can be used to avoid being affected by something like llvm-lit -Dllc='llc --debugify-and-strip-all-safe' I tested this without the lost debug locations verifier to confirm that AArch64 behaviour is unaffected (with the fixes in this patch) and with it to confirm it finds the problems without the additional RUN lines we had before. Depends on D77886, D77887, D77747 Reviewers: aprantl, vsk, bogner Subscribers: qcolombet, kristof.beyls, hiraditya, danielkiss, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D77888
41 lines
1.4 KiB
YAML
41 lines
1.4 KiB
YAML
# RUN: llc -mtriple=aarch64 -run-pass=patchable-function %s -o - | FileCheck %s
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## The initial .loc covers PATCHABLE_FUNCTION_ENTER.
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## Emitting a new .loc may create a prologue_end prematurely.
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# CHECK: name: empty
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# CHECK: bb.0.entry
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# CHECK: PATCHABLE_FUNCTION_ENTER{{$}}
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# CHECK-NEXT: RET undef $lr, debug-location !9
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--- |
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define void @empty() #0 !dbg !6 {
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entry:
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ret void, !dbg !9
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}
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attributes #0 = { "patchable-function-entry"="1" }
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "a.c", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = distinct !DISubprogram(name: "empty", scope: !1, file: !1, line: 1, type: !7, scopeLine: 1, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!7 = !DISubroutineType(types: !8)
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!8 = !{null}
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!9 = !DILocation(line: 1, column: 61, scope: !6)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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...
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---
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name: empty
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alignment: 4
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $lr
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RET undef $lr, debug-location !9
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...
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