1; RUN: opt -passes=instcombine -S %s | FileCheck %s 2 3;; Instcombine folds the trunc %x into the phi. Check it updates the phi's dbg 4;; user (otherwise the dbg use becomes poison after the original phi is 5;; deleted). Check the new phi inherits the DebugLoc. 6 7; CHECK: %[[phi:.*]] = phi i8 [ 1, %{{.*}} ], [ 0, %{{.*}} ], !dbg ![[dbg:[0-9]+]] 8; CHECK: #dbg_value(i8 %[[phi]], ![[#]], !DIExpression(DW_OP_LLVM_convert, 8, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value) 9; CHECK: ![[dbg]] = !DILocation(line: 123, 10 11target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 12target triple = "x86_64-unknown-linux-gnu" 13 14define linkonce_odr float @f(i1 %cond) { 15entry: 16 br i1 %cond, label %if.then, label %if.end 17 18if.then: ; preds = entry 19 br label %if.end 20 21if.end: ; preds = %if.then, %entry 22 %p.0 = phi i32 [ 1, %if.then ], [ 0, %entry ], !dbg !13 23 call void @llvm.dbg.value(metadata i32 %p.0, metadata !4, metadata !DIExpression()), !dbg !13 24 %x = trunc i32 %p.0 to i8 25 %callff = call float @ff(i8 %x) 26 ret float %callff 27} 28 29declare void @llvm.dbg.value(metadata, metadata, metadata) 30declare float @ff(float) 31 32!llvm.dbg.cu = !{!0} 33!llvm.module.flags = !{!3} 34 35!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_11, file: !1, producer: "clang version 17.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, retainedTypes: !2, splitDebugInlining: false, nameTableKind: None) 36!1 = !DIFile(filename: "btConvexTriangleMeshShape.cpp", directory: "/") 37!2 = !{} 38!3 = !{i32 2, !"Debug Info Version", i32 3} 39!4 = !DILocalVariable(name: "p", scope: !5, file: !6, line: 2057, type: !12) 40!5 = distinct !DILexicalBlock(scope: !7, file: !6, line: 2056, column: 4) 41!6 = !DIFile(filename: "reduce.cpp", directory: "/") 42!7 = distinct !DISubprogram(name: "diagonalize", linkageName: "_ZN11btMatrix3x311diagonalizeERS_fi", scope: !8, file: !6, line: 2054, type: !9, scopeLine: 2055, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, declaration: !11, retainedNodes: !2) 43!8 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "btMatrix3x3", file: !6, line: 2050, size: 24, flags: DIFlagTypePassByValue, elements: !2, identifier: "_ZTS11btMatrix3x3") 44!9 = !DISubroutineType(types: !10) 45!10 = !{null} 46!11 = !DISubprogram(name: "diagonalize", linkageName: "_ZN11btMatrix3x311diagonalizeERS_fi", scope: !8, file: !6, line: 2054, type: !9, scopeLine: 2054, flags: DIFlagPublic | DIFlagPrototyped, spFlags: DISPFlagOptimized) 47!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 48!13 = !DILocation(line: 123, scope: !5) 49