| ; RUN: llc %s -o - -start-after=codegenprepare -stop-before=finalize-isel \ |
| ; RUN: -mtriple=x86_64-unknown-unknown -experimental-debug-variable-locations \ |
| ; RUN: | FileCheck %s |
| |
| ; Test for a crash / weird behaviour when llvm.frameaddress.* is called. |
| ; Today, as a concession, we emit a DBG_PHI allowing the frame register value |
| ; to be read, but it could be expressed in other ways. Check that this works |
| ; outside of the entry block, to avoid the frame register being recognised |
| ; as def'd by frame-setup code or as a function argument. |
| |
| ; CHECK-LABEL: bb.1.notentry: |
| ; CHECK: DBG_PHI $rbp |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| declare i8 *@llvm.frameaddress.p0i8(i32) |
| |
| ; Function Attrs: mustprogress nofree nosync nounwind sspstrong uwtable |
| define hidden i8 * @foo() !dbg !7 { |
| entry: |
| br label %notentry |
| |
| notentry: |
| %0 = tail call i8* @llvm.frameaddress.p0i8(i32 0), !dbg !12 |
| call void @llvm.dbg.value(metadata i8* %0, metadata !11, metadata !DIExpression()), !dbg !12 |
| ret i8 *%0 |
| } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) |
| !1 = !DIFile(filename: "foo.cpp", directory: ".") |
| !2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed) |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 2} |
| !6 = !{i32 7, !"PIC Level", i32 2} |
| !7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!2, !2} |
| !10 = !{!11} |
| !11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2) |
| !12 = !DILocation(line: 10, scope: !7) |
