1; RUN: opt -instcombine -S < %s | FileCheck %s 2 3declare void @llvm.init.trampoline(i8*, i8*, i8*) 4declare i8* @llvm.adjust.trampoline(i8*) 5declare i32 @f(i8 * nest, i32) 6 7; Most common case 8define i32 @test0(i32 %n) !dbg !4 { 9 %alloca = alloca [10 x i8], align 16 10 %gep = getelementptr [10 x i8], [10 x i8]* %alloca, i32 0, i32 0 11 call void @llvm.init.trampoline(i8* %gep, i8* bitcast (i32 (i8*, i32)* @f to i8*), 12 i8* null) 13 %tramp = call i8* @llvm.adjust.trampoline(i8* %gep) 14 %function = bitcast i8* %tramp to i32(i32)* 15 %ret = call i32 %function(i32 %n), !dbg !10 16 ret i32 %ret 17 18; CHECK: define i32 @test0(i32 %n) !dbg !4 { 19; CHECK: %ret = call i32 @f(i8* nest null, i32 %n), !dbg !10 20} 21 22define i32 @test1(i32 %n, i8* %trampmem) { 23 call void @llvm.init.trampoline(i8* %trampmem, 24 i8* bitcast (i32 (i8*, i32)* @f to i8*), 25 i8* null) 26 %tramp = call i8* @llvm.adjust.trampoline(i8* %trampmem) 27 %function = bitcast i8* %tramp to i32(i32)* 28 %ret = call i32 %function(i32 %n) 29 ret i32 %ret 30; CHECK: define i32 @test1(i32 %n, i8* %trampmem) { 31; CHECK: %ret = call i32 @f(i8* nest null, i32 %n) 32} 33 34define i32 @test2(i32 %n, i8* %trampmem) { 35 %tramp = call i8* @llvm.adjust.trampoline(i8* %trampmem) 36 %functiona = bitcast i8* %tramp to i32(i32)* 37 %ret = call i32 %functiona(i32 %n) 38 ret i32 %ret 39; CHECK: define i32 @test2(i32 %n, i8* %trampmem) { 40; CHECK: %ret = call i32 %functiona(i32 %n) 41} 42 43define i32 @test3(i32 %n, i8* %trampmem) { 44 call void @llvm.init.trampoline(i8* %trampmem, 45 i8* bitcast (i32 (i8*, i32)* @f to i8*), 46 i8* null) 47 48; CHECK: define i32 @test3(i32 %n, i8* %trampmem) { 49; CHECK: %ret0 = call i32 @f(i8* nest null, i32 %n) 50 %tramp0 = call i8* @llvm.adjust.trampoline(i8* %trampmem) 51 %function0 = bitcast i8* %tramp0 to i32(i32)* 52 %ret0 = call i32 %function0(i32 %n) 53 54 ;; Not optimized since previous call could be writing. 55 %tramp1 = call i8* @llvm.adjust.trampoline(i8* %trampmem) 56 %function1 = bitcast i8* %tramp1 to i32(i32)* 57 %ret1 = call i32 %function1(i32 %n) 58; CHECK: %ret1 = call i32 %function1(i32 %n) 59 60 ret i32 %ret1 61} 62 63define i32 @test4(i32 %n) { 64 %alloca = alloca [10 x i8], align 16 65 %gep = getelementptr [10 x i8], [10 x i8]* %alloca, i32 0, i32 0 66 call void @llvm.init.trampoline(i8* %gep, i8* bitcast (i32 (i8*, i32)* @f to i8*), 67 i8* null) 68 69 %tramp0 = call i8* @llvm.adjust.trampoline(i8* %gep) 70 %function0 = bitcast i8* %tramp0 to i32(i32)* 71 %ret0 = call i32 %function0(i32 %n) 72 73 %tramp1 = call i8* @llvm.adjust.trampoline(i8* %gep) 74 %function1 = bitcast i8* %tramp0 to i32(i32)* 75 %ret1 = call i32 %function1(i32 %n) 76 77 %tramp2 = call i8* @llvm.adjust.trampoline(i8* %gep) 78 %function2 = bitcast i8* %tramp2 to i32(i32)* 79 %ret2 = call i32 %function2(i32 %n) 80 81 ret i32 %ret2 82 83; CHECK: define i32 @test4(i32 %n) { 84; CHECK: %ret0 = call i32 @f(i8* nest null, i32 %n) 85; CHECK: %ret1 = call i32 @f(i8* nest null, i32 %n) 86; CHECK: %ret2 = call i32 @f(i8* nest null, i32 %n) 87} 88 89!llvm.dbg.cu = !{!0} 90!llvm.module.flags = !{!3} 91 92!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.0 (trunk 127710)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2) 93!1 = !DIFile(filename: "string.h", directory: "Game") 94!2 = !{} 95!3 = !{i32 1, !"Debug Info Version", i32 3} 96!4 = distinct !DISubprogram(name: "passthru", scope: !1, file: !1, line: 79, type: !5, isLocal: true, isDefinition: true, scopeLine: 79, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8) 97!5 = !DISubroutineType(types: !6) 98!6 = !{!7} 99!7 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !0, baseType: null, size: 64, align: 64) 100!8 = !{!9} 101!9 = !DILocalVariable(name: "a", arg: 1, scope: !4, file: !1, line: 78, type: !7) 102!10 = !DILocation(line: 78, column: 28, scope: !4) 103