| ; RUN: opt -passes=gvn -S < %s | FileCheck %s |
| |
| ; Check that the redundant load from %if.then is removed. |
| ; Also, check that the debug location associated to load %0 still refers to |
| ; line 3 and not line 6. |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| ; CHECK: @test_redundant_load( |
| ; CHECK-LABEL: entry: |
| ; CHECK-NEXT: load i32, ptr %Y, align 4, !dbg ![[LOC:[0-9]+]] |
| ; CHECK-LABEL: if.then: |
| ; CHECK-NOT: load |
| ; CHECK-LABEL: if.end: |
| ; CHECK: ![[LOC]] = !DILocation(line: 3, scope: !{{.*}}) |
| |
| define i32 @test_redundant_load(i32 %X, ptr %Y) !dbg !6 { |
| entry: |
| %0 = load i32, ptr %Y, align 4, !dbg !8 |
| %cmp = icmp sgt i32 %X, -1, !dbg !9 |
| br i1 %cmp, label %if.then, label %if.end, !dbg !9 |
| |
| if.then: ; preds = %entry |
| %1 = load i32, ptr %Y, align 4, !dbg !10 |
| %add = add nsw i32 %0, %1, !dbg !10 |
| call void @foo(), !dbg !11 |
| br label %if.end, !dbg !12 |
| |
| if.end: ; preds = %if.then, %entry |
| %Result.0 = phi i32 [ %add, %if.then ], [ %0, %entry ] |
| ret i32 %Result.0, !dbg !13 |
| } |
| |
| declare void @foo() |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2) |
| !1 = !DIFile(filename: "test.cpp", directory: "") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"PIC Level", i32 2} |
| !6 = distinct !DISubprogram(name: "test_redundant_load", scope: !1, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) |
| !7 = !DISubroutineType(types: !2) |
| !8 = !DILocation(line: 3, scope: !6) |
| !9 = !DILocation(line: 5, scope: !6) |
| !10 = !DILocation(line: 6, scope: !6) |
| !11 = !DILocation(line: 7, scope: !6) |
| !12 = !DILocation(line: 8, scope: !6) |
| !13 = !DILocation(line: 10, scope: !6) |