diff options
Diffstat (limited to 'llvm/test/DebugInfo/X86/live-debug-values-expr-conflict.ll')
| -rw-r--r-- | llvm/test/DebugInfo/X86/live-debug-values-expr-conflict.ll | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/llvm/test/DebugInfo/X86/live-debug-values-expr-conflict.ll b/llvm/test/DebugInfo/X86/live-debug-values-expr-conflict.ll new file mode 100644 index 00000000000..1d02ee70e9b --- /dev/null +++ b/llvm/test/DebugInfo/X86/live-debug-values-expr-conflict.ll @@ -0,0 +1,75 @@ +; RUN: llc %s -mtriple=x86_64-unknown-unknown -o - -stop-after=livedebugvalues | FileCheck %s +; +; In the C below, 'baz' is re-assigned with a value that gets salvaged, making +; it's dbg.value base itself on 'bar', but with a complex expression. +; LiveDebugValues should recognize that these are different locations, and not +; propagate a location for 'baz' into the return block. +; +; void escape1(int bees); +; void escape2(int bees); +; +; int foo(int bar) { +; int baz = bar; +; if (baz == 12) { +; escape1(bar); +; } else { +; baz += 1; +; escape2(bar); +; } +; +; return bar; +; } +; +; We should get a plain DBG_VALUE in the entry block, a plain one then complex +; one in the block two, and none in block three. +; CHECK: ![[BAZVAR:[0-9]+]] = !DILocalVariable(name: "baz", +; CHECK-LABEL: bb.0.entry: +; CHECK: DBG_VALUE {{[0-9a-zA-Z$%_]*}}, $noreg, ![[BAZVAR]], +; CHECK-SAME: !DIExpression() +; CHECK-LABEL: bb.1.if.then: +; CHECK-LABEL: bb.2.if.else: +; CHECK: DBG_VALUE {{[0-9a-zA-Z$%_]*}}, $noreg, ![[BAZVAR]], +; CHECK-SAME: !DIExpression() +; CHECK: DBG_VALUE {{[0-9a-zA-Z$%_]*}}, $noreg, ![[BAZVAR]], +; CHECK-SAME: !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value) +; CHECK-LABEL: bb.3.if.end: +; CHECK-NOT: DBG_VALUE + +declare void @escape1(i32) +declare void @escape2(i32) +declare void @llvm.dbg.value(metadata, metadata, metadata) + +define i32 @foo(i32 returned %bar) !dbg !7 { +entry: + call void @llvm.dbg.value(metadata i32 %bar, metadata !13, metadata !DIExpression()), !dbg !14 + %cmp = icmp eq i32 %bar, 12, !dbg !14 + br i1 %cmp, label %if.then, label %if.else, !dbg !14 + +if.then: + tail call void @escape1(i32 12) #3, !dbg !14 + br label %if.end, !dbg !14 + +if.else: + call void @llvm.dbg.value(metadata i32 %bar, metadata !13, metadata !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value)), !dbg !14 + tail call void @escape2(i32 %bar) #3, !dbg !14 + br label %if.end + +if.end: + ret i32 %bar, !dbg !14 +} + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4} + +!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) +!1 = !DIFile(filename: "exprconflict.c", directory: "/home/jmorse") +!2 = !{} +!3 = !{i32 2, !"Dwarf Version", i32 4} +!4 = !{i32 2, !"Debug Info Version", i32 3} +!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 5, type: !8, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) +!8 = !DISubroutineType(types: !9) +!9 = !{!10, !10} +!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) +!11 = !{!13} +!13 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 6, type: !10) +!14 = !DILocation(line: 1, scope: !7) |
