[LoopRotate] Propagate dbg.value intrinsics
Recommitting patch which was previously reverted in r297159. These
changes should address the casting issues.
The original patch enables dbg.value intrinsics to be attached to
newly inserted PHI nodes.
Differential Review: https://reviews.llvm.org/D30701
llvm-svn: 297269
diff --git a/llvm/test/Transforms/LoopRotate/phi-dbgvalue.ll b/llvm/test/Transforms/LoopRotate/phi-dbgvalue.ll
new file mode 100644
index 0000000..aa8ca2f
--- /dev/null
+++ b/llvm/test/Transforms/LoopRotate/phi-dbgvalue.ll
@@ -0,0 +1,79 @@
+; RUN: opt -S -loop-rotate < %s | FileCheck %s
+
+;CHECK-LABEL: func
+;CHECK-LABEL: entry
+;CHECK-NEXT: tail call void @llvm.dbg.value(metadata i32 %a
+;CHECK-NEXT: tail call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !13, metadata !11), !dbg !15
+;CHECK-LABEL: for.body:
+;CHECK-NEXT: [[I:%.*]] = phi i32 [ 1, %entry ], [ %inc, %for.body ]
+;CHECK-NEXT: tail call void @llvm.dbg.value(metadata i32 [[I]], i64 0, metadata !13, metadata !11), !dbg !15
+
+; Function Attrs: noinline nounwind
+define void @func(i32 %a) local_unnamed_addr #0 !dbg !6 {
+entry:
+ tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !10, metadata !11), !dbg !12
+ tail call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !13, metadata !11), !dbg !15
+ br label %for.cond, !dbg !16
+
+for.cond: ; preds = %for.body, %entry
+ %i.0 = phi i32 [ 1, %entry ], [ %inc, %for.body ]
+ tail call void @llvm.dbg.value(metadata i32 %i.0, i64 0, metadata !13, metadata !11), !dbg !15
+ %cmp = icmp slt i32 %i.0, 10, !dbg !17
+ br i1 %cmp, label %for.body, label %for.end, !dbg !20
+
+for.body: ; preds = %for.cond
+ %add = add nsw i32 %i.0, %a, !dbg !22
+ %call = tail call i32 @func2(i32 %i.0, i32 %add) #3, !dbg !24
+ %inc = add nsw i32 %i.0, 1, !dbg !25
+ tail call void @llvm.dbg.value(metadata i32 %inc, i64 0, metadata !13, metadata !11), !dbg !15
+ br label %for.cond, !dbg !27, !llvm.loop !28
+
+for.end: ; preds = %for.cond
+ ret void, !dbg !31
+}
+
+declare i32 @func2(i32, i32) local_unnamed_addr
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
+
+attributes #0 = { noinline nounwind }
+attributes #2 = { nounwind readnone }
+attributes #3 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4}
+!llvm.ident = !{!5}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 (http://llvm.org/git/clang.git 0f3ed908c1f13f83da4b240f7595eb8d05e0a754) (http://llvm.org/git/llvm.git 8e270f5a6b8ceb0f3ac3ef1ffb83c5e29b44ae68)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
+!1 = !DIFile(filename: "debug-phi.c", directory: "/work/projects/src/tests/debug")
+!2 = !{}
+!3 = !{i32 2, !"Dwarf Version", i32 4}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = !{!"clang version 5.0.0 (http://llvm.org/git/clang.git 0f3ed908c1f13f83da4b240f7595eb8d05e0a754) (http://llvm.org/git/llvm.git 8e270f5a6b8ceb0f3ac3ef1ffb83c5e29b44ae68)"}
+!6 = distinct !DISubprogram(name: "func", scope: !1, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2)
+!7 = !DISubroutineType(types: !8)
+!8 = !{null, !9}
+!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!10 = !DILocalVariable(name: "a", arg: 1, scope: !6, file: !1, line: 2, type: !9)
+!11 = !DIExpression()
+!12 = !DILocation(line: 2, column: 15, scope: !6)
+!13 = !DILocalVariable(name: "i", scope: !14, file: !1, line: 3, type: !9)
+!14 = distinct !DILexicalBlock(scope: !6, file: !1, line: 3, column: 3)
+!15 = !DILocation(line: 3, column: 11, scope: !14)
+!16 = !DILocation(line: 3, column: 7, scope: !14)
+!17 = !DILocation(line: 3, column: 20, scope: !18)
+!18 = !DILexicalBlockFile(scope: !19, file: !1, discriminator: 1)
+!19 = distinct !DILexicalBlock(scope: !14, file: !1, line: 3, column: 3)
+!20 = !DILocation(line: 3, column: 3, scope: !21)
+!21 = !DILexicalBlockFile(scope: !14, file: !1, discriminator: 1)
+!22 = !DILocation(line: 4, column: 15, scope: !23)
+!23 = distinct !DILexicalBlock(scope: !19, file: !1, line: 3, column: 31)
+!24 = !DILocation(line: 4, column: 5, scope: !23)
+!25 = !DILocation(line: 3, column: 27, scope: !26)
+!26 = !DILexicalBlockFile(scope: !19, file: !1, discriminator: 2)
+!27 = !DILocation(line: 3, column: 3, scope: !26)
+!28 = distinct !{!28, !29, !30}
+!29 = !DILocation(line: 3, column: 3, scope: !14)
+!30 = !DILocation(line: 5, column: 3, scope: !14)
+!31 = !DILocation(line: 6, column: 1, scope: !6)