78 lines · plain
1; RUN: opt < %s -passes=gvn -S | FileCheck %s2; CHECK: {{^}}for.body:3; CHECK-NEXT: [[VREG1:%[^ ]+]] = phi{{.*}}[[VREG2:%[^ ]+]],{{.*}}%.sink,4; CHECK-NOT: !dbg5; CHECK-SAME: {{$}}6; CHECK: {{^}}for.inc:7; CHECK-NEXT: [[VREG2]] = phi{{.*}}%inc,{{.*}}[[VREG1]]8 9target triple = "x86_64-unknown-linux-gnu"10 11@g = external local_unnamed_addr global i32, align 412 13; Function Attrs: nounwind uwtable14define void @foo(i32 %x, i32 %y, i32 %z) local_unnamed_addr #0 !dbg !4 {15entry:16 %not.tobool = icmp eq i32 %x, 0, !dbg !817 %.sink = zext i1 %not.tobool to i32, !dbg !818 store i32 %.sink, ptr @g, align 4, !tbaa !919 %cmp8 = icmp sgt i32 %y, 0, !dbg !1320 br i1 %cmp8, label %for.body.preheader, label %for.end, !dbg !1721 22for.body.preheader: ; preds = %entry23 br label %for.body, !dbg !1924 25for.body: ; preds = %for.body.preheader, %for.inc26 %i.09 = phi i32 [ %inc4, %for.inc ], [ 0, %for.body.preheader ]27 %cmp1 = icmp sgt i32 %i.09, %z, !dbg !1928 br i1 %cmp1, label %if.then2, label %for.inc, !dbg !2129 30if.then2: ; preds = %for.body31 %0 = load i32, ptr @g, align 4, !dbg !22, !tbaa !932 %inc = add nsw i32 %0, 1, !dbg !2233 store i32 %inc, ptr @g, align 4, !dbg !22, !tbaa !934 br label %for.inc, !dbg !2335 36for.inc: ; preds = %for.body, %if.then237 %inc4 = add nuw nsw i32 %i.09, 1, !dbg !2438 %exitcond = icmp ne i32 %inc4, %y, !dbg !1339 br i1 %exitcond, label %for.body, label %for.end.loopexit, !dbg !1740 41for.end.loopexit: ; preds = %for.inc42 br label %for.end, !dbg !2643 44for.end: ; preds = %for.end.loopexit, %entry45 ret void, !dbg !2646}47 48!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)49!1 = !DIFile(filename: "foo.c", directory: "b/")50!2 = !{i32 2, !"Dwarf Version", i32 4}51!3 = !{i32 2, !"Debug Info Version", i32 3}52!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0)53!5 = !DISubroutineType(types: !6)54!6 = !{null, !7, !7, !7}55!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)56!8 = !DILocation(line: 4, column: 7, scope: !4)57!9 = !{!10, !10, i64 0}58!10 = !{!"int", !11, i64 0}59!11 = !{!"omnipotent char", !12, i64 0}60!12 = !{!"Simple C/C++ TBAA"}61!13 = !DILocation(line: 10, column: 13, scope: !14)62!14 = !DILexicalBlockFile(scope: !15, file: !1, discriminator: 1)63!15 = distinct !DILexicalBlock(scope: !16, file: !1, line: 10, column: 3)64!16 = distinct !DILexicalBlock(scope: !4, file: !1, line: 10, column: 3)65!17 = !DILocation(line: 10, column: 3, scope: !18)66!18 = !DILexicalBlockFile(scope: !16, file: !1, discriminator: 1)67!19 = !DILocation(line: 11, column: 11, scope: !20)68!20 = distinct !DILexicalBlock(scope: !15, file: !1, line: 11, column: 9)69!21 = !DILocation(line: 11, column: 9, scope: !15)70!22 = !DILocation(line: 12, column: 8, scope: !20)71!23 = !DILocation(line: 12, column: 7, scope: !20)72!24 = !DILocation(line: 10, column: 20, scope: !25)73!25 = !DILexicalBlockFile(scope: !15, file: !1, discriminator: 2)74!26 = !DILocation(line: 13, column: 1, scope: !4)75 76!llvm.dbg.cu = !{!0}77!llvm.module.flags = !{!2, !3}78