1 ; RUN: opt -S -codegenprepare < %s | FileCheck %s 2 ; 3 ; This test case was generated from the following source code: 4 ; 5 ; long long foo(int *ptr, int cond) { 6 ; long long result = 3; 7 ; unsigned val = *ptr; // line 3 8 ; switch (cond) { 9 ; case 3: 10 ; result = val; // line 6 11 ; break; 12 ; case 4: 13 ; result += 2; 14 ; } 15 ; 16 ; return result + val; 17 ; }; 18 ; 19 ; When CGP moves a zext Z of a load L to the block where L lives, Z should not 20 ; retain its original debug location. Instead, Z should reuse the debug location 21 ; associated with L. Logically the zero extend will become part of the load; the 22 ; code generator will attempt to fuse the two instructions into a zextload. 23 24 ; CHECK-LABEL: @test 25 ; CHECK: [[LOADVAL:%[0-9]+]] = load i32, i32* %ptr, align 4, !dbg [[DEBUGLOC:![0-9]+]] 26 ; CHECK-NEXT: zext i32 [[LOADVAL]] to i64, !dbg [[DEBUGLOC]] 27 ; CHECK: [[DEBUGLOC]] = !DILocation(line: 3 28 29 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 30 target triple = "x86_64-unknown-linux-gnu" 31 32 define i64 @test(i32* %ptr, i32 %cond) !dbg !5 { 33 entry: 34 %0 = load i32, i32* %ptr, align 4, !dbg !7 35 switch i32 %cond, label %sw.epilog [ 36 i32 3, label %sw.bb 37 i32 4, label %sw.bb1 38 ], !dbg !8 39 40 sw.bb: ; preds = %entry 41 %conv = zext i32 %0 to i64, !dbg !9 42 br label %sw.epilog, !dbg !10 43 44 sw.bb1: ; preds = %entry 45 br label %sw.epilog, !dbg !11 46 47 sw.epilog: ; preds = %sw.bb1, %entry, %sw.bb 48 %result.0 = phi i64 [ 3, %entry ], [ 5, %sw.bb1 ], [ %conv, %sw.bb ] 49 %conv2 = zext i32 %0 to i64, !dbg !12 50 %add3 = add nuw nsw i64 %result.0, %conv2, !dbg !13 51 ret i64 %add3, !dbg !14 52 } 53 54 !llvm.dbg.cu = !{!0} 55 !llvm.module.flags = !{!3, !4} 56 57 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2) 58 !1 = !DIFile(filename: "test.c", directory: "") 59 !2 = !{} 60 !3 = !{i32 2, !"Dwarf Version", i32 4} 61 !4 = !{i32 2, !"Debug Info Version", i32 3} 62 !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, retainedNodes: !2) 63 !6 = !DISubroutineType(types: !2) 64 !7 = !DILocation(line: 3, column: 18, scope: !5) 65 !8 = !DILocation(line: 4, column: 3, scope: !5) 66 !9 = !DILocation(line: 6, column: 14, scope: !5) 67 !10 = !DILocation(line: 7, column: 5, scope: !5) 68 !11 = !DILocation(line: 10, column: 3, scope: !5) 69 !12 = !DILocation(line: 12, column: 19, scope: !5) 70 !13 = !DILocation(line: 12, column: 17, scope: !5) 71 !14 = !DILocation(line: 12, column: 3, scope: !5) 72