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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
72 lines
3.1 KiB
LLVM
72 lines
3.1 KiB
LLVM
; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -pass-remarks-analysis=asm-printer \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs \
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; RUN: -pass-remarks-with-hotness=1 -asm-verbose=0 \
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; RUN: -debug-only=lazy-machine-block-freq,block-freq \
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; RUN: -debug-pass=Executions 2>&1 | FileCheck %s -check-prefix=HOTNESS
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; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -pass-remarks-analysis=asm-printer \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs \
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; RUN: -pass-remarks-with-hotness=0 -asm-verbose=0 \
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; RUN: -debug-only=lazy-machine-block-freq,block-freq \
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; RUN: -debug-pass=Executions 2>&1 | FileCheck %s -check-prefix=NO_HOTNESS
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; REQUIRES: asserts
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; Verify that we don't new populate MachineBFI for passes that already use
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; MBFI, e.g. GreedyRegAlloc. (This hard-codes the previous pass to the
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; GreedyRegAlloc, please adjust accordingly.)
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; HOTNESS: Executing Pass 'Spill Code Placement Analysis'
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; HOTNESS-NEXT: Executing Pass 'Lazy Machine Block Frequency Analysis'
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; HOTNESS-NEXT: Executing Pass 'Machine Optimization Remark Emitter'
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; HOTNESS-NEXT: MachineBlockFrequencyInfo is available
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; HOTNESS-NEXT: Executing Pass 'Greedy Register Allocator'
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; Verify that we only populate MachineBFI on behalf of ORE when hotness is
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; requested. (This hard-codes the previous pass to the Assembly Printer,
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; please adjust accordingly.)
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; HOTNESS: Freeing Pass 'Machine Outliner'
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; HOTNESS-NEXT: Executing Pass 'Function Pass Manager'
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; HOTNESS-NEXT: Executing Pass 'Verify generated machine code'
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; HOTNESS-NEXT: Freeing Pass 'Verify generated machine code'
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; HOTNESS-NEXT: Executing Pass 'Lazy Machine Block Frequency Analysis'
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; HOTNESS-NEXT: Executing Pass 'Machine Optimization Remark Emitter'
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; HOTNESS-NEXT: Building MachineBlockFrequencyInfo on the fly
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; HOTNESS-NEXT: Building LoopInfo on the fly
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; HOTNESS-NEXT: Building DominatorTree on the fly
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; HOTNESS-NOT: Executing Pass
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; HOTNESS: block-frequency: empty_func
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; HOTNESS-NOT: Executing Pass
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; HOTNESS: Executing Pass 'AArch64 Assembly Printer'
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; HOTNESS: arm64-summary-remarks.ll:5:0: 1 instructions in function (hotness: 33)
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; NO_HOTNESS: Freeing Pass 'Machine Outliner'
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; NO_HOTNESS-NEXT: Executing Pass 'Function Pass Manager'
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; NO_HOTNESS-NEXT: Executing Pass 'Verify generated machine code'
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; NO_HOTNESS-NEXT: Freeing Pass 'Verify generated machine code'
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; NO_HOTNESS-NEXT: Executing Pass 'Lazy Machine Block Frequency Analysis'
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; NO_HOTNESS-NEXT: Executing Pass 'Machine Optimization Remark Emitter'
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; NO_HOTNESS-NEXT: Executing Pass 'AArch64 Assembly Printer'
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; NO_HOTNESS: arm64-summary-remarks.ll:5:0: 1 instructions in function{{$}}
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define void @empty_func() nounwind ssp !dbg !3 !prof !4 {
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ret void
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1)
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!1 = !DIFile(filename: "arm64-summary-remarks.ll", directory: "")
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!2 = !{i32 2, !"Debug Info Version", i32 3}
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!3 = distinct !DISubprogram(name: "empty_func", scope: !1, file: !1, line: 5, scopeLine: 5, unit: !0)
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!4 = !{!"function_entry_count", i64 33}
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