| ; 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$%_]*}}, $noreg, ![[BAZVAR]],
|
| ; CHECK-SAME: !DIExpression() |
| ; CHECK-LABEL: bb.1.if.then: |
| ; CHECK-LABEL: bb.2.if.else: |
| ; CHECK: DBG_VALUE {{[0-9a-zA-Z$%_]*}}, $noreg, ![[BAZVAR]],
|
| ; CHECK-SAME: !DIExpression() |
| ; CHECK: DBG_VALUE_LIST ![[BAZVAR]],
|
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 1, DW_OP_stack_value)
|
| ; CHECK-SAME: {{[0-9a-zA-Z$%_]*}}
|
| ; CHECK-LABEL: bb.3.if.end: |
| ; CHECK-NOT: DBG_VALUE |
| ; CHECK-NOT: DBG_VALUE_LIST
|
| |
| 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) |