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c877e03376
If we know that we'll definitely save LR to a register, there's no reason to pre-check whether or not a stack instruction is unsafe to fix up. This makes it so that we check for that condition before mapping instructions. This allows us to outline more, since we don't pessimise as many instructions. Also update some tests, since we outline more. llvm-svn: 348081
131 lines
5.4 KiB
LLVM
131 lines
5.4 KiB
LLVM
; RUN: llc %s -enable-machine-outliner -mtriple=aarch64-unknown-unknown -pass-remarks=machine-outliner -pass-remarks-missed=machine-outliner -o /dev/null 2>&1 | FileCheck %s
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; CHECK: <unknown>:0:0:
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; CHECK-SAME: Did not outline 2 instructions from 2 locations.
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; CHECK-SAME: Bytes from outlining all occurrences (16) >=
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; CHECK-SAME: Unoutlined instruction bytes (16)
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; CHECK-SAME: (Also found at: <UNKNOWN LOCATION>)
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; CHECK: remark: <unknown>:0:0: Saved 48 bytes by outlining 14 instructions
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; CHECK-SAME: from 2 locations. (Found at: <UNKNOWN LOCATION>,
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; CHECK-SAME: <UNKNOWN LOCATION>)
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; RUN: llc %s -enable-machine-outliner -mtriple=aarch64-unknown-unknown -o /dev/null -pass-remarks-missed=machine-outliner -pass-remarks-output=%t.yaml
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; RUN: cat %t.yaml | FileCheck %s -check-prefix=YAML
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; For the YAML case, the function we pick depends on the order of the candidate
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; list.
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; YAML: --- !Missed
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; YAML-NEXT: Pass: machine-outliner
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; YAML-NEXT: Name: NotOutliningCheaper
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; YAML-NEXT: Function:
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'Did not outline '
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; YAML-NEXT: - Length: '2'
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; YAML-NEXT: - String: ' instructions'
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; YAML-NEXT: - String: ' from '
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; YAML-NEXT: - NumOccurrences: '2'
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; YAML-NEXT: - String: ' locations.'
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; YAML-NEXT: - String: ' Bytes from outlining all occurrences ('
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; YAML-NEXT: - OutliningCost: '16'
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; YAML-NEXT: - String: ')'
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; YAML-NEXT: - String: ' >= Unoutlined instruction bytes ('
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; YAML-NEXT: - NotOutliningCost: '16'
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; YAML-NEXT: - String: ')'
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; YAML-NEXT: - String: ' (Also found at: '
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; YAML-NEXT: - OtherStartLoc1: '<UNKNOWN LOCATION>'
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; YAML-NEXT: - String: ')'
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; YAML: --- !Passed
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; YAML-NEXT: Pass: machine-outliner
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; YAML-NEXT: Name: OutlinedFunction
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; YAML-NEXT: Function: OUTLINED_FUNCTION_0
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'Saved '
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; YAML-NEXT: - OutliningBenefit: '48'
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; YAML-NEXT: - String: ' bytes by '
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; YAML-NEXT: - String: 'outlining '
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; YAML-NEXT: - Length: '14'
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; YAML-NEXT: - String: ' instructions '
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; YAML-NEXT: - String: 'from '
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; YAML-NEXT: - NumOccurrences: '2'
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; YAML-NEXT: - String: ' locations. '
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; YAML-NEXT: - String: '(Found at: '
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; YAML-NEXT: - StartLoc0: '<UNKNOWN LOCATION>'
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; YAML-NEXT: - String: ', '
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; YAML-NEXT: - StartLoc1: '<UNKNOWN LOCATION>'
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; YAML-NEXT: - String: ')'
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define void @dog() #0 !dbg !8 {
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entry:
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%x = alloca i32, align 4
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%y = alloca i32, align 4
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store i32 0, i32* %x, align 4
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store i32 1, i32* %y, align 4, !dbg !12
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ret void
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}
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define void @cat() #0 !dbg !14 {
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entry:
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%x = alloca i32, align 4
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%y = alloca i32, align 4
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store i32 0, i32* %x, align 4
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store i32 1, i32* %y, align 4, !dbg !16
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ret void
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}
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define void @foo() #0 !dbg !18 {
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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%4 = alloca i32, align 4
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%5 = alloca i32, align 4
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%6 = alloca i32, align 4
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store i32 1, i32* %1, align 4, !dbg !24
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store i32 2, i32* %2, align 4
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store i32 3, i32* %3, align 4
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store i32 4, i32* %4, align 4
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store i32 5, i32* %5, align 4
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store i32 6, i32* %6, align 4, !dbg !26
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ret void
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}
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define void @bar() #0 !dbg !27 {
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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%4 = alloca i32, align 4
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%5 = alloca i32, align 4
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%6 = alloca i32, align 4
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store i32 1, i32* %1, align 4, !dbg !33
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store i32 2, i32* %2, align 4
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store i32 3, i32* %3, align 4
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store i32 4, i32* %4, align 4
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store i32 5, i32* %5, align 4
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store i32 6, i32* %6, align 4, !dbg !35
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ret void
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}
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attributes #0 = { noredzone nounwind ssp uwtable "no-frame-pointer-elim"="false" "target-cpu"="cyclone" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "machine-outliner-remarks.ll", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"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 = !{i32 7, !"PIC Level", i32 2}
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!7 = !{!""}
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!8 = distinct !DISubprogram(name: "dog", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null}
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!12 = !DILocation(line: 5, column: 9, scope: !8)
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!14 = distinct !DISubprogram(name: "cat", scope: !1, file: !1, line: 10, type: !9, isLocal: false, isDefinition: true, scopeLine: 11, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!16 = !DILocation(line: 13, column: 9, scope: !14)
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!18 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 26, type: !9, isLocal: false, isDefinition: true, scopeLine: 26, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!24 = !DILocation(line: 27, column: 9, scope: !18)
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!26 = !DILocation(line: 29, column: 9, scope: !18)
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!27 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 35, type: !9, isLocal: false, isDefinition: true, scopeLine: 35, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!33 = !DILocation(line: 36, column: 1, scope: !27)
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!35 = !DILocation(line: 38, column: 1, scope: !27)
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