1b8f68ad9SJeremy Morse; RUN: llc %s -o - -stop-before=finalize-isel \ 2b8f68ad9SJeremy Morse; RUN: -experimental-debug-variable-locations \ 3b8f68ad9SJeremy Morse; RUN: | FileCheck %s 4b8f68ad9SJeremy Morse 5b8f68ad9SJeremy Morse;; The multiply by zero of %width below causes %width to become unused very late 6b8f68ad9SJeremy Morse;; in SelectionDAG. As a result, DBG_INSTR_REFs are produced that refer to a 7b8f68ad9SJeremy Morse;; vreg that is never defined, which risks a crash. Check that we don't crash, 8b8f68ad9SJeremy Morse;; and produce an empty variable location. 9b8f68ad9SJeremy Morse 10e10e9363SStephen Tozer; CHECK: DBG_VALUE_LIST {{.+}}, $noreg 11*da0faa05SStephen Tozer; CHECK: DBG_VALUE_LIST {{.+}}, $noreg, 4 12b8f68ad9SJeremy Morse 13b8f68ad9SJeremy Morsetarget datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 14b8f68ad9SJeremy Morsetarget triple = "x86_64-unknown-unknown" 15b8f68ad9SJeremy Morse 16b8f68ad9SJeremy Morse%class.Color = type { i8 } 17b8f68ad9SJeremy Morse 185a288fa3SNikita Popovdefine hidden void @_Z14drawXZWideLineR4Vec3RK5Colorf(ptr %color, float %width) local_unnamed_addr !dbg !7 { 19b8f68ad9SJeremy Morsecond.false.i: 20b8f68ad9SJeremy Morse br label %_ZN4Vec39normalizeEv.exit, !dbg !12 21b8f68ad9SJeremy Morse 22b8f68ad9SJeremy Morse_ZN4Vec39normalizeEv.exit: ; preds = %cond.false.i 23b8f68ad9SJeremy Morse call void @llvm.dbg.value(metadata float %width, metadata !11, metadata !DIExpression()), !dbg !12 24*da0faa05SStephen Tozer call void @llvm.dbg.value(metadata !DIArgList(float %width, i32 4), metadata !11, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_mul, DW_OP_stack_value)), !dbg !12 25b8f68ad9SJeremy Morse %mul.i = fmul float %width, 0.000000e+00, !dbg !12 26b8f68ad9SJeremy Morse ret void, !dbg !12 27b8f68ad9SJeremy Morse} 28b8f68ad9SJeremy Morse 29b8f68ad9SJeremy Morse; Function Attrs: nofree nosync nounwind readnone speculatable willreturn 30b8f68ad9SJeremy Morsedeclare void @llvm.dbg.value(metadata, metadata, metadata) 31b8f68ad9SJeremy Morse 32b8f68ad9SJeremy Morse!llvm.dbg.cu = !{!0} 33b8f68ad9SJeremy Morse!llvm.module.flags = !{!3, !4, !5, !6} 34b8f68ad9SJeremy Morse 35b8f68ad9SJeremy Morse!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) 36b8f68ad9SJeremy Morse!1 = !DIFile(filename: "foo.cpp", directory: ".") 37b8f68ad9SJeremy Morse!2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed) 38b8f68ad9SJeremy Morse!3 = !{i32 2, !"Dwarf Version", i32 4} 39b8f68ad9SJeremy Morse!4 = !{i32 2, !"Debug Info Version", i32 3} 40b8f68ad9SJeremy Morse!5 = !{i32 1, !"wchar_size", i32 2} 41b8f68ad9SJeremy Morse!6 = !{i32 7, !"PIC Level", i32 2} 42b8f68ad9SJeremy Morse!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) 43b8f68ad9SJeremy Morse!8 = !DISubroutineType(types: !9) 44b8f68ad9SJeremy Morse!9 = !{!2, !2} 45b8f68ad9SJeremy Morse!10 = !{!11} 46b8f68ad9SJeremy Morse!11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2) 47b8f68ad9SJeremy Morse!12 = !DILocation(line: 10, scope: !7) 48