| ; RUN: opt -S -codegenprepare < %s | FileCheck %s |
| ; |
| ; This test case was generated from the following source code: |
| ; |
| ; long long foo(int *ptr, int cond) { |
| ; long long result = 3; |
| ; unsigned val = *ptr; // line 3 |
| ; switch (cond) { |
| ; case 3: |
| ; result = val; // line 6 |
| ; break; |
| ; case 4: |
| ; result += 2; |
| ; } |
| ; |
| ; return result + val; |
| ; }; |
| ; |
| ; When CGP moves a zext Z of a load L to the block where L lives, Z should not |
| ; retain its original debug location. Instead, Z should reuse the debug location |
| ; associated with L. Logically the zero extend will become part of the load; the |
| ; code generator will attempt to fuse the two instructions into a zextload. |
| |
| ; CHECK-LABEL: @test |
| ; CHECK: [[LOADVAL:%[0-9]+]] = load i32, ptr %ptr, align 4, !dbg [[DEBUGLOC:![0-9]+]] |
| ; CHECK-NEXT: zext i32 [[LOADVAL]] to i64 |
| ; CHECK: [[DEBUGLOC]] = !DILocation(line: 3 |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define i64 @test(ptr %ptr, i32 %cond) !dbg !5 { |
| entry: |
| %0 = load i32, ptr %ptr, align 4, !dbg !7 |
| switch i32 %cond, label %sw.epilog [ |
| i32 3, label %sw.bb |
| i32 4, label %sw.bb1 |
| ], !dbg !8 |
| |
| sw.bb: ; preds = %entry |
| %conv = zext i32 %0 to i64, !dbg !9 |
| br label %sw.epilog, !dbg !10 |
| |
| sw.bb1: ; preds = %entry |
| br label %sw.epilog, !dbg !11 |
| |
| sw.epilog: ; preds = %sw.bb1, %entry, %sw.bb |
| %result.0 = phi i64 [ 3, %entry ], [ 5, %sw.bb1 ], [ %conv, %sw.bb ] |
| %conv2 = zext i32 %0 to i64, !dbg !12 |
| %add3 = add nuw nsw i64 %result.0, %conv2, !dbg !13 |
| ret i64 %add3, !dbg !14 |
| } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2) |
| !1 = !DIFile(filename: "test.c", directory: "") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !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) |
| !6 = !DISubroutineType(types: !2) |
| !7 = !DILocation(line: 3, column: 18, scope: !5) |
| !8 = !DILocation(line: 4, column: 3, scope: !5) |
| !9 = !DILocation(line: 6, column: 14, scope: !5) |
| !10 = !DILocation(line: 7, column: 5, scope: !5) |
| !11 = !DILocation(line: 10, column: 3, scope: !5) |
| !12 = !DILocation(line: 12, column: 19, scope: !5) |
| !13 = !DILocation(line: 12, column: 17, scope: !5) |
| !14 = !DILocation(line: 12, column: 3, scope: !5) |