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c8b56276e7
[recommitting after the fix in r288307] This includes the intervening store and the load/store that we're trying to forward from in the optimization remark for the missed load elimination. This is hooked up under a new mode in ORE that allows for compile-time budget for a bit more analysis to print more insightful messages. This mode is currently enabled for -fsave-optimization-record (-Rpass is trickier since it is controlled in the front-end). With this we can now print the red remark in http://lab.llvm.org:8080/artifacts/opt-view_test-suite/build/SingleSource/Benchmarks/Dhrystone/CMakeFiles/dry.dir/html/_org_test-suite_SingleSource_Benchmarks_Dhrystone_dry.c.html#L446 Differential Revision: https://reviews.llvm.org/D26490 llvm-svn: 288381
109 lines
3.8 KiB
LLVM
109 lines
3.8 KiB
LLVM
; RUN: opt < %s -gvn -o /dev/null -pass-remarks-output=%t -S -pass-remarks=gvn \
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; RUN: 2>&1 | FileCheck %s
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; RUN: cat %t | FileCheck -check-prefix=YAML %s
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; CHECK: remark: <unknown>:0:0: load of type i32 eliminated{{$}}
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; CHECK-NEXT: remark: <unknown>:0:0: load of type i32 eliminated{{$}}
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; CHECK-NEXT: remark: <unknown>:0:0: load of type i32 eliminated{{$}}
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; CHECK-NOT: remark:
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; YAML: --- !Passed
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; YAML-NEXT: Pass: gvn
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; YAML-NEXT: Name: LoadElim
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; YAML-NEXT: Function: arg
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'load of type '
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; YAML-NEXT: - Type: i32
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; YAML-NEXT: - String: ' eliminated'
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; YAML-NEXT: - String: ' in favor of '
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; YAML-NEXT: - InfavorOfValue: i
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; YAML-NEXT: ...
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; YAML-NEXT: --- !Passed
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; YAML-NEXT: Pass: gvn
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; YAML-NEXT: Name: LoadElim
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; YAML-NEXT: Function: const
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'load of type '
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; YAML-NEXT: - Type: i32
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; YAML-NEXT: - String: ' eliminated'
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; YAML-NEXT: - String: ' in favor of '
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; YAML-NEXT: - InfavorOfValue: '4'
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; YAML-NEXT: ...
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; YAML-NEXT: --- !Passed
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; YAML-NEXT: Pass: gvn
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; YAML-NEXT: Name: LoadElim
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; YAML-NEXT: Function: inst
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'load of type '
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; YAML-NEXT: - Type: i32
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; YAML-NEXT: - String: ' eliminated'
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; YAML-NEXT: - String: ' in favor of '
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; YAML-NEXT: - InfavorOfValue: load
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; YAML-NEXT: ...
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; YAML-NEXT: --- !Missed
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; YAML-NEXT: Pass: gvn
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; YAML-NEXT: Name: LoadClobbered
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; YAML-NEXT: DebugLoc: { File: /tmp/s.c, Line: 3, Column: 3 }
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; YAML-NEXT: Function: may_alias
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'load of type '
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; YAML-NEXT: - Type: i32
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; YAML-NEXT: - String: ' not eliminated'
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; YAML-NEXT: - String: ' in favor of '
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; YAML-NEXT: - OtherAccess: load
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; YAML-NEXT: DebugLoc: { File: /tmp/s.c, Line: 1, Column: 13 }
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; YAML-NEXT: - String: ' because it is clobbered by '
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; YAML-NEXT: - ClobberedBy: store
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; YAML-NEXT: DebugLoc: { File: /tmp/s.c, Line: 2, Column: 10 }
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; YAML-NEXT: ...
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define i32 @arg(i32* %p, i32 %i) {
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entry:
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store i32 %i, i32* %p
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%load = load i32, i32* %p
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ret i32 %load
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}
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define i32 @const(i32* %p) {
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entry:
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store i32 4, i32* %p
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%load = load i32, i32* %p
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ret i32 %load
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}
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define i32 @inst(i32* %p) {
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entry:
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%load1 = load i32, i32* %p
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%load = load i32, i32* %p
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%add = add i32 %load1, %load
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ret i32 %add
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}
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define i32 @may_alias(i32* %p, i32* %r) !dbg !7 {
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entry:
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%load1 = load i32, i32* %p, !tbaa !13, !dbg !9
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store i32 4, i32* %r, !tbaa !13, !dbg !10
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%load = load i32, i32* %p, !tbaa !13, !dbg !11
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%add = add i32 %load1, %load
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ret i32 %add
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 282540) (llvm/trunk 282542)", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
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!1 = !DIFile(filename: "/tmp/s.c", 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, !"PIC Level", i32 2}
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!6 = !{!"clang version 4.0.0 (trunk 282540) (llvm/trunk 282542)"}
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!7 = distinct !DISubprogram(name: "may_alias", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, variables: !2)
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!8 = !DISubroutineType(types: !2)
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!9 = !DILocation(line: 1, column: 13, scope: !7)
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!10 = !DILocation(line: 2, column: 10, scope: !7)
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!11 = !DILocation(line: 3, column: 3, scope: !7)
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!12 = !{ !"tbaa root" }
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!13 = !{ !"int", !12 }
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