1 ; REQUIRES: asserts 2 ; RUN: opt < %s -globalopt -stats -disable-output 2>&1 | FileCheck %s 3 ; CHECK: 1 globalopt - Number of global vars shrunk to booleans 4 5 @Stop = internal global i32 0 ; <i32*> [#uses=3] 6 7 define i32 @foo(i32 %i) nounwind ssp { 8 entry: 9 %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] 10 call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !3, metadata !{}) 11 %0 = icmp eq i32 %i, 1, !dbg !7 ; <i1> [#uses=1] 12 br i1 %0, label %bb, label %bb1, !dbg !7 13 14 bb: ; preds = %entry 15 store i32 0, i32* @Stop, align 4, !dbg !9 16 %1 = mul nsw i32 %i, 42, !dbg !10 ; <i32> [#uses=1] 17 call void @llvm.dbg.value(metadata i32 %1, i64 0, metadata !3, metadata !{}), !dbg !10 18 br label %bb2, !dbg !10 19 20 bb1: ; preds = %entry 21 store i32 1, i32* @Stop, align 4, !dbg !11 22 br label %bb2, !dbg !11 23 24 bb2: ; preds = %bb1, %bb 25 %i_addr.0 = phi i32 [ %1, %bb ], [ %i, %bb1 ] ; <i32> [#uses=1] 26 br label %return, !dbg !12 27 28 return: ; preds = %bb2 29 ret i32 %i_addr.0, !dbg !12 30 } 31 32 declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone 33 34 define i32 @bar() nounwind ssp { 35 entry: 36 %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] 37 %0 = load i32, i32* @Stop, align 4, !dbg !13 ; <i32> [#uses=1] 38 %1 = icmp eq i32 %0, 1, !dbg !13 ; <i1> [#uses=1] 39 br i1 %1, label %bb, label %bb1, !dbg !13 40 41 bb: ; preds = %entry 42 br label %bb2, !dbg !18 43 44 bb1: ; preds = %entry 45 br label %bb2, !dbg !19 46 47 bb2: ; preds = %bb1, %bb 48 %.0 = phi i32 [ 0, %bb ], [ 1, %bb1 ] ; <i32> [#uses=1] 49 br label %return, !dbg !19 50 51 return: ; preds = %bb2 52 ret i32 %.0, !dbg !19 53 } 54 55 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone 56 57 !llvm.dbg.cu = !{!1} 58 !0 = !DIGlobalVariable(name: "Stop", line: 2, isLocal: true, isDefinition: true, scope: !1, file: !1, type: !2, variable: i32* @Stop) 59 !1 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: true, emissionKind: FullDebug, file: !20, enums: !21, retainedTypes: !21, globals: !{!0}) 60 !2 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 61 !3 = !DILocalVariable(name: "i", line: 4, arg: 1, scope: !4, file: !1, type: !2) 62 !4 = distinct !DISubprogram(name: "foo", linkageName: "foo", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !1, scope: !1, type: !5) 63 !5 = !DISubroutineType(types: !6) 64 !6 = !{!2, !2} 65 !7 = !DILocation(line: 5, scope: !8) 66 !8 = distinct !DILexicalBlock(line: 0, column: 0, file: !20, scope: !4) 67 !9 = !DILocation(line: 6, scope: !8) 68 !10 = !DILocation(line: 7, scope: !8) 69 !11 = !DILocation(line: 9, scope: !8) 70 !12 = !DILocation(line: 11, scope: !8) 71 !13 = !DILocation(line: 14, scope: !14) 72 !14 = distinct !DILexicalBlock(line: 0, column: 0, file: !20, scope: !15) 73 !15 = distinct !DISubprogram(name: "bar", linkageName: "bar", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !1, scope: !1, type: !16) 74 !16 = !DISubroutineType(types: !17) 75 !17 = !{!2} 76 !18 = !DILocation(line: 15, scope: !14) 77 !19 = !DILocation(line: 16, scope: !14) 78 !20 = !DIFile(filename: "g.c", directory: "/tmp") 79 !21 = !{i32 0} 80
