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; RUN: opt < %s -passes=gvn -o /dev/null -pass-remarks-output=%t -S
; RUN: cat %t | FileCheck %s
; CHECK: --- !Missed
; CHECK-NEXT: Pass: gvn
; CHECK-NEXT: Name: LoadClobbered
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 2, Column: 2 }
; CHECK-NEXT: Function: multipleUsers
; CHECK-NEXT: Args:
; CHECK-NEXT: - String: 'load of type '
; CHECK-NEXT: - Type: i32
; CHECK-NEXT: - String: ' not eliminated'
; CHECK-NEXT: - String: ' in favor of '
; CHECK-NEXT: - OtherAccess: store
; CHECK-NEXT: - String: ' because it is clobbered by '
; CHECK-NEXT: - ClobberedBy: call
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 1, Column: 1 }
; CHECK-NEXT: ...
; CHECK: --- !Missed
; CHECK-NEXT: Pass: gvn
; CHECK-NEXT: Name: LoadClobbered
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 4, Column: 4 }
; CHECK-NEXT: Function: multipleUsers
; CHECK-NEXT: Args:
; CHECK-NEXT: - String: 'load of type '
; CHECK-NEXT: - Type: i32
; CHECK-NEXT: - String: ' not eliminated'
; CHECK-NEXT: - String: ' in favor of '
; CHECK-NEXT: - OtherAccess: load
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 2, Column: 2 }
; CHECK-NEXT: - String: ' because it is clobbered by '
; CHECK-NEXT: - ClobberedBy: call
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 3, Column: 3 }
; CHECK-NEXT: ...
; ModuleID = 'bugpoint-reduced-simplified.bc'
source_filename = "gvn-test.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Tests that a last clobbering use can be determined even in the presence of
; multiple users, given that one of them lies on a path between every other
; potentially clobbering use and the load.
define dso_local void @multipleUsers(ptr %a, i32 %b) local_unnamed_addr #0 {
entry:
store i32 %b, ptr %a, align 4
tail call void @clobberingFunc() #1, !dbg !10
%0 = load i32, ptr %a, align 4, !dbg !11
tail call void @clobberingFunc() #1, !dbg !12
%1 = load i32, ptr %a, align 4, !dbg !13
%add2 = add nsw i32 %1, %0
ret void
}
; CHECK: --- !Missed
; CHECK-NEXT: Pass: gvn
; CHECK-NEXT: Name: LoadClobbered
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 2, Column: 2 }
; CHECK-NEXT: Function: multipleUsers2
; CHECK-NEXT: Args:
; CHECK-NEXT: - String: 'load of type '
; CHECK-NEXT: - Type: i32
; CHECK-NEXT: - String: ' not eliminated'
; CHECK-NEXT: - String: ' in favor of '
; CHECK-NEXT: - OtherAccess: store
; CHECK-NEXT: - String: ' because it is clobbered by '
; CHECK-NEXT: - ClobberedBy: call
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 1, Column: 1 }
; CHECK-NEXT: ...
; CHECK: --- !Missed
; CHECK-NEXT: Pass: gvn
; CHECK-NEXT: Name: LoadClobbered
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 4, Column: 4 }
; CHECK-NEXT: Function: multipleUsers2
; CHECK-NEXT: Args:
; CHECK-NEXT: - String: 'load of type '
; CHECK-NEXT: - Type: i32
; CHECK-NEXT: - String: ' not eliminated'
; CHECK-NEXT: - String: ' in favor of '
; CHECK-NEXT: - OtherAccess: load
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 2, Column: 2 }
; CHECK-NEXT: - String: ' because it is clobbered by '
; CHECK-NEXT: - ClobberedBy: call
; CHECK-NEXT: DebugLoc: { File: '/tmp/s.c', Line: 3, Column: 3 }
; CHECK-NEXT: ...
; Ignore uses in other functions
define dso_local void @multipleUsers2(i32 %b) local_unnamed_addr #0 {
entry:
store i32 %b, ptr @g, align 4
tail call void @clobberingFunc() #1, !dbg !15
%0 = load i32, ptr @g, align 4, !dbg !16
tail call void @clobberingFunc() #1, !dbg !17
%1 = load i32, ptr @g, align 4, !dbg !18
%add3 = add nsw i32 %1, %0
ret void
}
declare dso_local void @clobberingFunc() local_unnamed_addr #0
@g = external global i32
define dso_local void @globalUser(i32 %b) local_unnamed_addr #0 {
entry:
store i32 %b, ptr @g, align 4
ret void
}
attributes #0 = { "use-soft-float"="false" }
attributes #1 = { nounwind }
!llvm.dbg.cu = !{!1}
!llvm.module.flags = !{!4, !5, !6}
!llvm.ident = !{!0}
!0 = !{!"clang version 10.0.0 (git@github.com:llvm/llvm-project.git a2f6ae9abffcba260c22bb235879f0576bf3b783)"}
!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang version 4.0.0 (trunk 282540) (llvm/trunk 282542)", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !3)
!2 = !DIFile(filename: "/tmp/s.c", directory: "/tmp")
!3 = !{}
!4 = !{i32 2, !"Dwarf Version", i32 4}
!5 = !{i32 2, !"Debug Info Version", i32 3}
!6 = !{i32 1, !"PIC Level", i32 2}
!8 = distinct !DISubprogram(name: "multipleUsers", scope: !2, file: !2, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !1, retainedNodes: !3)
!9 = !DISubroutineType(types: !3)
!10 = !DILocation(line: 1, column: 1, scope: !8)
!11 = !DILocation(line: 2, column: 2, scope: !8)
!12 = !DILocation(line: 3, column: 3, scope: !8)
!13 = !DILocation(line: 4, column: 4, scope: !8)
!14 = distinct !DISubprogram(name: "multipleUsers2", scope: !2, file: !2, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !1, retainedNodes: !3)
!15 = !DILocation(line: 1, column: 1, scope: !14)
!16 = !DILocation(line: 2, column: 2, scope: !14)
!17 = !DILocation(line: 3, column: 3, scope: !14)
!18 = !DILocation(line: 4, column: 4, scope: !14)
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