48 lines · plain
1; RUN: llc -mtriple=x86_64-unknown-unknown -o - %s | FileCheck %s2; RUN: llc -mtriple=x86_64-unknown-unknown -filetype=obj < %s \3; RUN: | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF4 5define i1 @test() !dbg !4 {6entry:7 %end = alloca i64, align 88 br label %while.cond9 10while.cond:11 call void @llvm.dbg.value(metadata ptr %end, metadata !5, metadata !6), !dbg !712 %call = call i1 @fn(ptr %end, ptr %end, ptr null, ptr null, i64 0, ptr null, ptr null, ptr null), !dbg !713 br label %while.body14 15while.body:16 br i1 0, label %while.end, label %while.cond17 18while.end:19 ret i1 true20}21 22; CHECK-LABEL: test23; To get the value of the variable, we need to do [$rsp+8], i.e:24; CHECK: #DEBUG_VALUE: test:w <- [DW_OP_plus_uconst 8, DW_OP_deref] $rsp25; DWARF: DW_AT_location (26; DWARF-NEXT: [{{.*}}, {{.*}}): DW_OP_breg7 RSP+8)27 28; Note: A previous version of this test checked for `[DW_OP_plus_uconst 8] [$rsp+0]`,29; which is incorrect, because it adds the stack offset after dereferencing the stack pointer.30 31declare i1 @fn(ptr, ptr, ptr, ptr, i64, ptr, ptr, ptr)32declare void @llvm.dbg.value(metadata, metadata, metadata)33 34!llvm.dbg.cu = !{!0}35!llvm.module.flags = !{!2,!3}36 37!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 4.0.0", emissionKind: FullDebug)38!1 = !DIFile(filename: "test.c", directory: "/")39!2 = !{i32 2, !"Dwarf Version", i32 4}40!3 = !{i32 2, !"Debug Info Version", i32 3}41!4 = distinct !DISubprogram(name: "test", type: !10, unit: !0)42!5 = !DILocalVariable(name: "w", scope: !4, type: !9)43!6 = !DIExpression(DW_OP_deref)44!7 = !DILocation(line: 210, column: 12, scope: !4)45!8 = !{!9}46!9 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)47!10 = !DISubroutineType(types: !8)48