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72 lines
2.7 KiB
LLVM
72 lines
2.7 KiB
LLVM
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; RUN: opt -S -codegenprepare < %s | FileCheck %s
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;
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; This test case was generated from the following source code:
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;
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; long long foo(int *ptr, int cond) {
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; long long result = 3;
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; unsigned val = *ptr; // line 3
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; switch (cond) {
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; case 3:
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; result = val; // line 6
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; break;
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; case 4:
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; result += 2;
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; }
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;
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; return result + val;
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; };
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;
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; When CGP moves a zext Z of a load L to the block where L lives, Z should not
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; retain its original debug location. Instead, Z should reuse the debug location
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; associated with L. Logically the zero extend will become part of the load; the
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; code generator will attempt to fuse the two instructions into a zextload.
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; CHECK-LABEL: @test
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; CHECK: [[LOADVAL:%[0-9]+]] = load i32, i32* %ptr, align 4, !dbg [[DEBUGLOC:![0-9]+]]
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; CHECK-NEXT: zext i32 [[LOADVAL]] to i64, !dbg [[DEBUGLOC]]
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; CHECK: [[DEBUGLOC]] = !DILocation(line: 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 i64 @test(i32* %ptr, i32 %cond) !dbg !5 {
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entry:
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%0 = load i32, i32* %ptr, align 4, !dbg !7
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switch i32 %cond, label %sw.epilog [
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i32 3, label %sw.bb
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i32 4, label %sw.bb1
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], !dbg !8
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sw.bb: ; preds = %entry
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%conv = zext i32 %0 to i64, !dbg !9
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br label %sw.epilog, !dbg !10
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sw.bb1: ; preds = %entry
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br label %sw.epilog, !dbg !11
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sw.epilog: ; preds = %sw.bb1, %entry, %sw.bb
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%result.0 = phi i64 [ 3, %entry ], [ 5, %sw.bb1 ], [ %conv, %sw.bb ]
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%conv2 = zext i32 %0 to i64, !dbg !12
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%add3 = add nuw nsw i64 %result.0, %conv2, !dbg !13
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ret i64 %add3, !dbg !14
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}
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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: true, 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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!5 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
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!6 = !DISubroutineType(types: !2)
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!7 = !DILocation(line: 3, column: 18, scope: !5)
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!8 = !DILocation(line: 4, column: 3, scope: !5)
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!9 = !DILocation(line: 6, column: 14, scope: !5)
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!10 = !DILocation(line: 7, column: 5, scope: !5)
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!11 = !DILocation(line: 10, column: 3, scope: !5)
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!12 = !DILocation(line: 12, column: 19, scope: !5)
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!13 = !DILocation(line: 12, column: 17, scope: !5)
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!14 = !DILocation(line: 12, column: 3, scope: !5)
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