| ; RUN: opt -S -mtriple=x86_64 -codegenprepare %s | FileCheck %s |
| ; |
| ; Generated from the following source with: |
| ; clang -O2 -g -S -emit-llvm -mllvm -stop-after=indirectbr-expand test.cpp |
| ; |
| ; extern void use(int); |
| ; extern int foo(long long); |
| ; |
| ; void test(int p) |
| ; { |
| ; int i = p + 4; |
| ; (void)foo(i); // sign extension of i |
| ; if (p) |
| ; return; |
| ; use(i); // use of original i |
| ; } |
| ; |
| ; PR39845: Check that CodeGenPrepare does not drop the reference to a local when it is |
| ; sign-extended and used later. |
| ; |
| ; CHECK: define{{.*}}test |
| ; CHECK: call{{.*}}dbg.value(metadata i32 %p |
| ; CHECK: call{{.*}}dbg.value(metadata i32 %add |
| ; |
| define dso_local void @_Z4testi(i32 %p) local_unnamed_addr !dbg !7 { |
| entry: |
| call void @llvm.dbg.value(metadata i32 %p, metadata !12, metadata !DIExpression()), !dbg !14 |
| %add = add nsw i32 %p, 4, !dbg !15 |
| call void @llvm.dbg.value(metadata i32 %add, metadata !13, metadata !DIExpression()), !dbg !16 |
| %conv = sext i32 %add to i64, !dbg !17 |
| %call = tail call i32 @_Z3foox(i64 %conv), !dbg !18 |
| %tobool = icmp eq i32 %p, 0, !dbg !19 |
| br i1 %tobool, label %if.end, label %cleanup, !dbg !21 |
| |
| if.end: |
| tail call void @_Z3usei(i32 %add), !dbg !22 |
| br label %cleanup, !dbg !23 |
| |
| cleanup: |
| ret void, !dbg !23 |
| } |
| |
| declare dso_local i32 @_Z3foox(i64) local_unnamed_addr |
| declare dso_local void @_Z3usei(i32) local_unnamed_addr |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 348209)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) |
| !1 = !DIFile(filename: "test.cpp", directory: "/home/test/src") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{!"clang version 8.0.0 (trunk 348209)"} |
| !7 = distinct !DISubprogram(name: "test", linkageName: "_Z4testi", scope: !1, file: !1, line: 4, type: !8, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{null, !10} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !{!12, !13} |
| !12 = !DILocalVariable(name: "p", arg: 1, scope: !7, file: !1, line: 4, type: !10) |
| !13 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 6, type: !10) |
| !14 = !DILocation(line: 4, column: 15, scope: !7) |
| !15 = !DILocation(line: 6, column: 13, scope: !7) |
| !16 = !DILocation(line: 6, column: 7, scope: !7) |
| !17 = !DILocation(line: 7, column: 13, scope: !7) |
| !18 = !DILocation(line: 7, column: 9, scope: !7) |
| !19 = !DILocation(line: 8, column: 7, scope: !20) |
| !20 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7) |
| !21 = !DILocation(line: 8, column: 7, scope: !7) |
| !22 = !DILocation(line: 10, column: 3, scope: !7) |
| !23 = !DILocation(line: 11, column: 1, scope: !7) |