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77 lines
2.5 KiB
77 lines
2.5 KiB
4 months ago
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; RUN: llc %s -mtriple=x86_64-unknown-unknown -use-unknown-locations=Enable -o - | FileCheck %s
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; Generated with "clang -gline-tables-only -c -emit-llvm -o - | opt -sroa -S"
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; from source:
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;
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; extern int foo(int);
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; extern int bar(int);
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;
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; int test(int a, int b) {
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; if(b)
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; a += foo(a);
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; else
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; a += bar(a);
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; return a;
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; }
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; When tail-merging the debug location of the common tail should be removed.
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; CHECK-LABEL: test:
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; CHECK: movl %edi, [[REG:%.*]]
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; CHECK: testl %esi, %esi
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; CHECK: je [[ELSE:.LBB[0-9]+_[0-9]+]]
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; CHECK: .loc 1 6 10
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; CHECK: callq foo
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; CHECK: jmp [[TAIL:.LBB[0-9]+_[0-9]+]]
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; CHECK: [[ELSE]]:
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; CHECK: .loc 1 8 10
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; CHECK: callq bar
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; CHECK: [[TAIL]]:
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; CHECK: .loc 1 0
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; CHECK: addl [[REG]], %eax
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; CHECK: .loc 1 9 3
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @test(i32 %a, i32 %b) !dbg !6 {
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entry:
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%tobool = icmp ne i32 %b, 0, !dbg !8
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br i1 %tobool, label %if.then, label %if.else, !dbg !8
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if.then: ; preds = %entry
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%call = call i32 @foo(i32 %a), !dbg !9
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%add = add nsw i32 %a, %call, !dbg !10
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br label %if.end, !dbg !11
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if.else: ; preds = %entry
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%call1 = call i32 @bar(i32 %a), !dbg !12
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%add2 = add nsw i32 %a, %call1, !dbg !13
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%a.addr.0 = phi i32 [ %add, %if.then ], [ %add2, %if.else ]
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ret i32 %a.addr.0, !dbg !14
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}
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declare i32 @foo(i32)
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declare i32 @bar(i32)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
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!1 = !DIFile(filename: "test.c", directory: "")
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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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!6 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 4, type: !7, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!7 = !DISubroutineType(types: !2)
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!8 = !DILocation(line: 5, column: 6, scope: !6)
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!9 = !DILocation(line: 6, column: 10, scope: !6)
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!10 = !DILocation(line: 6, column: 7, scope: !6)
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!11 = !DILocation(line: 6, column: 5, scope: !6)
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!12 = !DILocation(line: 8, column: 10, scope: !6)
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!13 = !DILocation(line: 8, column: 7, scope: !6)
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!14 = !DILocation(line: 9, column: 3, scope: !6)
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