1; RUN: llc %s -o - -start-after=codegenprepare -stop-before=finalize-isel \ 2; RUN: -mtriple=x86_64-unknown-unknown -experimental-debug-variable-locations \ 3; RUN: | FileCheck %s 4 5; Test for a crash / weird behaviour when llvm.frameaddress.* is called. 6; Today, as a concession, we emit a DBG_PHI allowing the frame register value 7; to be read, but it could be expressed in other ways. Check that this works 8; outside of the entry block, to avoid the frame register being recognised 9; as def'd by frame-setup code or as a function argument. 10 11; CHECK-LABEL: bb.1.notentry: 12; CHECK: DBG_PHI $rbp 13 14declare void @llvm.dbg.value(metadata, metadata, metadata) 15declare ptr @llvm.frameaddress.p0(i32) 16 17 ; Function Attrs: mustprogress nofree nosync nounwind sspstrong uwtable 18define hidden ptr @foo() !dbg !7 { 19entry: 20 br label %notentry 21 22notentry: 23 %0 = tail call ptr @llvm.frameaddress.p0(i32 0), !dbg !12 24 call void @llvm.dbg.value(metadata ptr %0, metadata !11, metadata !DIExpression()), !dbg !12 25 ret ptr %0 26} 27 28!llvm.dbg.cu = !{!0} 29!llvm.module.flags = !{!3, !4, !5, !6} 30!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) 31!1 = !DIFile(filename: "foo.cpp", directory: ".") 32!2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed) 33!3 = !{i32 2, !"Dwarf Version", i32 4} 34!4 = !{i32 2, !"Debug Info Version", i32 3} 35!5 = !{i32 1, !"wchar_size", i32 2} 36!6 = !{i32 7, !"PIC Level", i32 2} 37!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) 38!8 = !DISubroutineType(types: !9) 39!9 = !{!2, !2} 40!10 = !{!11} 41!11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2) 42!12 = !DILocation(line: 10, scope: !7) 43