2017-02-24 09:22:55 +08:00
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; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -pass-remarks-analysis=asm-printer \
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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: -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: Executing Pass 'Implement the 'patchable-function' attribute'
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; HOTNESS-NEXT: Freeing Pass 'Implement the 'patchable-function' attribute'
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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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Remove MachineLoopInfo dependency from AsmPrinter.
Summary:
Currently MachineLoopInfo is used in only two places:
1) for computing IsBasicBlockInsideInnermostLoop field of MCCodePaddingContext, and it is never used.
2) in emitBasicBlockLoopComments, which is called only if `isVerbose()` is true.
Despite that, we currently have a dependency on MachineLoopInfo, which makes
pass manager to compute it and MachineDominator Tree. This patch removes the
use (1) and makes the use (2) lazy, thus avoiding some redundant
recomputations.
Reviewers: opaparo, gadi.haber, rafael, craig.topper, zvi
Subscribers: rengolin, javed.absar, hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D44812
llvm-svn: 329542
2018-04-09 08:54:47 +08:00
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; HOTNESS: Executing Pass 'AArch64 Assembly Printer'
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2017-02-24 09:22:55 +08:00
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; HOTNESS: arm64-summary-remarks.ll:5:0: 1 instructions in function (hotness: 33)
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; NO_HOTNESS: Executing Pass 'Implement the 'patchable-function' attribute'
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; NO_HOTNESS-NEXT: Freeing Pass 'Implement the 'patchable-function' attribute'
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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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