derek.holloway
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89 lines
3.1 KiB
LLVM
89 lines
3.1 KiB
LLVM
; RUN: opt -S -passes=jump-threading < %s | FileCheck %s
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;; Check that when we simplify the load of %p by replacing it with 0 when coming
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;; from %left, the inttoptr cast instruction is assigned the DILocation from the
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;; load instruction.
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; CHECK-LABEL: define void @foo(
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[P:%.*]] = alloca i32, align 8
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; CHECK-NEXT: br i1 {{.*}}, label %[[LEFT:.*]], label %[[RIGHT:.*]]
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;; Cast in "left" should have the load's debug location.
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; CHECK: [[LEFT]]:
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P]], i8 0, i64 8, i1 false)
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; CHECK-NEXT: [[TMP0:%.*]] = inttoptr i64 0 to ptr, !dbg [[LOAD_LOC:![0-9]+]]
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; CHECK-NEXT: br label %[[END:.*]]
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; CHECK: [[RIGHT]]:
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; CHECK-NEXT: br i1 {{.*}}, label %[[RIGHT_LEFT:.*]], label %[[ENDTHREAD_PRE_SPLIT:.*]]
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;; Cast in "right.left" should not have a debug location, as we are not
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;; guaranteed to reach the load's original position.
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; CHECK: [[RIGHT_LEFT]]:
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P]], i8 0, i64 8, i1 false)
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; CHECK-NEXT: [[TMP1:%.*]] = inttoptr i64 0 to ptr
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; CHECK-NEXT: br i1 {{.*}}, label %[[END]], label %[[EXIT:.*]]
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;; Load in "right.right" should have the load's debug location.
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; CHECK: [[ENDTHREAD_PRE_SPLIT]]:
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; CHECK-NEXT: [[DOTPR:%.*]] = load ptr, ptr [[P]], align 8, !dbg [[LOAD_LOC]]
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; CHECK-NEXT: br label %[[END]], !dbg [[LOAD_LOC]]
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;; Finally, the PHI node should also have the load's debug location.
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; CHECK: [[END]]:
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; CHECK-NEXT: [[TMP2:%.*]] = phi ptr [ [[DOTPR]], %[[ENDTHREAD_PRE_SPLIT]] ], [ [[TMP1]], %[[RIGHT_LEFT]] ], [ [[TMP0]], %[[LEFT]] ], !dbg [[LOAD_LOC]]
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; CHECK: [[LOAD_LOC]] = !DILocation(line: 1, column: 1,
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define void @foo(i1 %b, i1 %c, i1 %d) !dbg !5 {
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entry:
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%p = alloca i32, align 8
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br i1 %b, label %left, label %right
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left:
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call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 8, i1 false)
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br label %end
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right:
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br i1 %c, label %right.left, label %right.right
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right.left:
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call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 8, i1 false)
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br i1 %d, label %end, label %exit
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right.right:
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br label %end
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end:
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%0 = load ptr, ptr %p, align 8, !dbg !8
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%isnull = icmp eq ptr %0, null
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br i1 %isnull, label %exit, label %notnull
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notnull:
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br label %exit
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exit:
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ret void
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}
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; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
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declare void @llvm.memset.p0.i64(ptr writeonly captures(none), i8, i64, i1 immarg) #0
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attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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!llvm.dbg.cu = !{!0}
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!llvm.debugify = !{!2, !3}
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!llvm.module.flags = !{!4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "simplify-partially-redundant-load-debugloc.ll", directory: "/")
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!2 = !{i32 13}
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!3 = !{i32 0}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !0, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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!6 = !DISubroutineType(types: !7)
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!7 = !{}
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!8 = !DILocation(line: 1, column: 1, scope: !5)
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