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f678ff58e2
Summary: Add an option to prevent diagnostics that do not meet a minimum hotness threshold from being output. When generating optimization remarks for large codebases with a ton of cold code paths, this option can be used to limit the optimization remark output at a reasonable size. Discussion of this change can be read here: http://lists.llvm.org/pipermail/llvm-dev/2017-June/114377.html Reviewers: anemet, davidxl, hfinkel Reviewed By: anemet Subscribers: qcolombet, javed.absar, fhahn, eraman, llvm-commits Differential Revision: https://reviews.llvm.org/D34867 llvm-svn: 306912
145 lines
6.9 KiB
LLVM
145 lines
6.9 KiB
LLVM
; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -aarch64-neon-syntax=apple -pass-remarks-missed=regalloc 2>&1 | FileCheck -check-prefix=REMARK %s
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; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -aarch64-neon-syntax=apple -pass-remarks-missed=regalloc -pass-remarks-with-hotness 2>&1 | FileCheck -check-prefix=HOTNESS %s
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; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -aarch64-neon-syntax=apple 2>&1 | FileCheck -check-prefix=NO_REMARK %s
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; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -aarch64-neon-syntax=apple -pass-remarks-output=%t.yaml -pass-remarks-with-hotness 2>&1 | FileCheck -check-prefix=NO_REMARK %s
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; RUN: cat %t.yaml | FileCheck -check-prefix=YAML %s
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;
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; Verify that remarks below the hotness threshold are not output.
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; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -aarch64-neon-syntax=apple -pass-remarks-missed=regalloc \
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; RUN: -pass-remarks-with-hotness -pass-remarks-hotness-threshold=500 \
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; RUN: 2>&1 | FileCheck -check-prefix=THRESHOLD %s
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; RUN: llc < %s -mtriple=arm64-apple-ios7.0 -aarch64-neon-syntax=apple -pass-remarks-output=%t.threshold.yaml \
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; RUN: -pass-remarks-with-hotness -pass-remarks-hotness-threshold=500 \
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; RUN: 2>&1 | FileCheck -check-prefix=NO_REMARK %s
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; RUN: cat %t.threshold.yaml | FileCheck -check-prefix=THRESHOLD_YAML %s
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; This has two nested loops, each with one value that has to be spilled and
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; then reloaded.
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; (loop3:)
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; REMARK: remark: /tmp/kk.c:3:20: 1 spills 1 reloads generated in loop{{$}}
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; (loop2:)
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; REMARK: remark: /tmp/kk.c:2:20: 1 spills 1 reloads generated in loop{{$}}
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; (loop:)
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; REMARK: remark: /tmp/kk.c:1:20: 2 spills 2 reloads generated in loop{{$}}
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; (loop3:)
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; HOTNESS: remark: /tmp/kk.c:3:20: 1 spills 1 reloads generated in loop (hotness: 300)
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; (loop2:)
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; HOTNESS: remark: /tmp/kk.c:2:20: 1 spills 1 reloads generated in loop (hotness: 30000)
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; (loop:)
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; HOTNESS: remark: /tmp/kk.c:1:20: 2 spills 2 reloads generated in loop (hotness: 300)
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; NO_REMARK-NOT: remark
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; THRESHOLD-NOT: (hotness: 300)
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; THRESHOLD: remark: /tmp/kk.c:2:20: 1 spills 1 reloads generated in loop (hotness: 30000)
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; YAML: --- !Missed
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; YAML: Pass: regalloc
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; YAML: Name: LoopSpillReload
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; YAML: DebugLoc: { File: /tmp/kk.c, Line: 3, Column: 20 }
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; YAML: Function: fpr128
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; YAML: Hotness: 300
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; YAML: Args:
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; YAML: - NumSpills: '1'
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; YAML: - String: ' spills '
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; YAML: - NumReloads: '1'
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; YAML: - String: ' reloads '
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; YAML: - String: generated in loop
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; YAML: ...
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; YAML: --- !Missed
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; YAML: Pass: regalloc
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; YAML: Name: LoopSpillReload
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; YAML: DebugLoc: { File: /tmp/kk.c, Line: 2, Column: 20 }
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; YAML: Function: fpr128
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; YAML: Hotness: 30000
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; YAML: Args:
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; YAML: - NumSpills: '1'
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; YAML: - String: ' spills '
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; YAML: - NumReloads: '1'
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; YAML: - String: ' reloads '
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; YAML: - String: generated in loop
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; YAML: ...
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; YAML: --- !Missed
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; YAML: Pass: regalloc
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; YAML: Name: LoopSpillReload
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; YAML: DebugLoc: { File: /tmp/kk.c, Line: 1, Column: 20 }
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; YAML: Function: fpr128
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; YAML: Hotness: 300
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; YAML: Args:
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; YAML: - NumSpills: '2'
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; YAML: - String: ' spills '
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; YAML: - NumReloads: '2'
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; YAML: - String: ' reloads '
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; YAML: - String: generated in loop
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; YAML: ...
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; THRESHOLD_YAML-NOT: Hotness: 300{{$}}
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; THRESHOLD_YAML: --- !Missed
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; THRESHOLD_YAML: Pass: regalloc
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; THRESHOLD_YAML: Name: LoopSpillReload
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; THRESHOLD_YAML: DebugLoc: { File: /tmp/kk.c, Line: 2, Column: 20 }
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; THRESHOLD_YAML: Function: fpr128
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; THRESHOLD_YAML: Hotness: 30000
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; THRESHOLD_YAML: Args:
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; THRESHOLD_YAML: - NumSpills: '1'
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; THRESHOLD_YAML: - String: ' spills '
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; THRESHOLD_YAML: - NumReloads: '1'
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; THRESHOLD_YAML: - String: ' reloads '
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; THRESHOLD_YAML: - String: generated in loop
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; THRESHOLD_YAML: ...
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define void @fpr128(<4 x float>* %p) nounwind ssp !prof !11 {
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entry:
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br label %loop, !dbg !8
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loop:
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%i = phi i32 [ 0, %entry], [ %i.2, %end2 ]
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br label %loop2, !dbg !9
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loop2:
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%j = phi i32 [ 0, %loop], [ %j.2, %loop2 ]
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call void asm sideeffect "; inlineasm", "~{q0},~{q1},~{q2},~{q3},~{q4},~{q5},~{q6},~{q7},~{q8},~{q9},~{q10},~{q11},~{q12},~{q13},~{q14},~{q15},~{q16},~{q17},~{q18},~{q19},~{q20},~{q21},~{q22},~{q23},~{q24},~{q25},~{q26},~{q27},~{q28},~{q29},~{q30},~{q31},~{x0},~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7},~{x8},~{x9},~{x10},~{x11},~{x12},~{x13},~{x14},~{x15},~{x16},~{x17},~{x18},~{x19},~{x20},~{x21},~{x22},~{x23},~{x24},~{x25},~{x26},~{x27},~{x28},~{fp},~{lr},~{sp},~{memory}"() nounwind
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%j.2 = add i32 %j, 1
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%c2 = icmp slt i32 %j.2, 100
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br i1 %c2, label %loop2, label %end2, !prof !12
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end2:
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call void asm sideeffect "; inlineasm", "~{q0},~{q1},~{q2},~{q3},~{q4},~{q5},~{q6},~{q7},~{q8},~{q9},~{q10},~{q11},~{q12},~{q13},~{q14},~{q15},~{q16},~{q17},~{q18},~{q19},~{q20},~{q21},~{q22},~{q23},~{q24},~{q25},~{q26},~{q27},~{q28},~{q29},~{q30},~{q31},~{x0},~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7},~{x8},~{x9},~{x10},~{x11},~{x12},~{x13},~{x14},~{x15},~{x16},~{x17},~{x18},~{x19},~{x20},~{x21},~{x22},~{x23},~{x24},~{x25},~{x26},~{x27},~{x28},~{fp},~{lr},~{sp},~{memory}"() nounwind
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%i.2 = add i32 %i, 1
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%c = icmp slt i32 %i.2, 100
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br i1 %c, label %loop, label %end, !prof !12
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end:
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br label %loop3
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loop3:
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%k = phi i32 [ 0, %end], [ %k.2, %loop3 ]
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call void asm sideeffect "; inlineasm", "~{q0},~{q1},~{q2},~{q3},~{q4},~{q5},~{q6},~{q7},~{q8},~{q9},~{q10},~{q11},~{q12},~{q13},~{q14},~{q15},~{q16},~{q17},~{q18},~{q19},~{q20},~{q21},~{q22},~{q23},~{q24},~{q25},~{q26},~{q27},~{q28},~{q29},~{q30},~{q31},~{x0},~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7},~{x8},~{x9},~{x10},~{x11},~{x12},~{x13},~{x14},~{x15},~{x16},~{x17},~{x18},~{x19},~{x20},~{x21},~{x22},~{x23},~{x24},~{x25},~{x26},~{x27},~{x28},~{fp},~{lr},~{sp},~{memory}"() nounwind
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%k.2 = add i32 %k, 1
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%c3 = icmp slt i32 %k.2, 100
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br i1 %c3, label %loop3, label %end3, !dbg !10, !prof !12
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end3:
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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 = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
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!1 = !DIFile(filename: "/tmp/kk.c", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"PIC Level", i32 2}
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!5 = !{!"clang version 3.9.0 "}
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!6 = distinct !DISubprogram(name: "success", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
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!7 = !DISubroutineType(types: !2)
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!8 = !DILocation(line: 1, column: 20, scope: !6)
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!9 = !DILocation(line: 2, column: 20, scope: !6)
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!10 = !DILocation(line: 3, column: 20, scope: !6)
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!11 = !{!"function_entry_count", i64 3}
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!12 = !{!"branch_weights", i32 99, i32 1}
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