76 lines
2.9 KiB
LLVM
76 lines
2.9 KiB
LLVM
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; RUN: opt -S -mtriple=x86_64 -codegenprepare %s | FileCheck %s
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;
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; Generated from the following source with:
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; clang -O2 -g -S -emit-llvm -mllvm -stop-after=indirectbr-expand test.cpp
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;
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; extern void use(int);
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; extern int foo(long long);
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;
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; void test(int p)
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; {
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; int i = p + 4;
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; (void)foo(i); // sign extension of i
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; if (p)
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; return;
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; use(i); // use of original i
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; }
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;
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; PR39845: Check that CodeGenPrepare does not drop the reference to a local when it is
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; sign-extended and used later.
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;
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; CHECK: define{{.*}}test
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; CHECK: call{{.*}}dbg.value(metadata i32 %p
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; CHECK: call{{.*}}dbg.value(metadata i32 %add
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;
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define dso_local void @_Z4testi(i32 %p) local_unnamed_addr !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32 %p, metadata !12, metadata !DIExpression()), !dbg !14
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%add = add nsw i32 %p, 4, !dbg !15
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call void @llvm.dbg.value(metadata i32 %add, metadata !13, metadata !DIExpression()), !dbg !16
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%conv = sext i32 %add to i64, !dbg !17
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%call = tail call i32 @_Z3foox(i64 %conv), !dbg !18
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%tobool = icmp eq i32 %p, 0, !dbg !19
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br i1 %tobool, label %if.end, label %cleanup, !dbg !21
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if.end:
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tail call void @_Z3usei(i32 %add), !dbg !22
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br label %cleanup, !dbg !23
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cleanup:
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ret void, !dbg !23
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}
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declare dso_local i32 @_Z3foox(i64) local_unnamed_addr
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declare dso_local void @_Z3usei(i32) local_unnamed_addr
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!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)
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!1 = !DIFile(filename: "test.cpp", directory: "/home/test/src")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 8.0.0 (trunk 348209)"}
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!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)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12, !13}
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!12 = !DILocalVariable(name: "p", arg: 1, scope: !7, file: !1, line: 4, type: !10)
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!13 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 6, type: !10)
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!14 = !DILocation(line: 4, column: 15, scope: !7)
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!15 = !DILocation(line: 6, column: 13, scope: !7)
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!16 = !DILocation(line: 6, column: 7, scope: !7)
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!17 = !DILocation(line: 7, column: 13, scope: !7)
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!18 = !DILocation(line: 7, column: 9, scope: !7)
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!19 = !DILocation(line: 8, column: 7, scope: !20)
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!20 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)
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!21 = !DILocation(line: 8, column: 7, scope: !7)
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!22 = !DILocation(line: 10, column: 3, scope: !7)
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!23 = !DILocation(line: 11, column: 1, scope: !7)
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