1 ; RUN: opt -S < %s -instcombine | FileCheck %s 2 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f80:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S32" 3 4 @G = constant [3 x i8] c"%s\00" ; <[3 x i8]*> [#uses=1] 5 6 declare i32 @sprintf(i8*, i8*, ...) 7 8 define void @foo(i8* %P, i32* %X) { 9 call i32 (i8*, i8*, ...) @sprintf( i8* %P, i8* getelementptr ([3 x i8], [3 x i8]* @G, i32 0, i32 0), i32* %X ) ; <i32>:1 [#uses=0] 10 ret void 11 } 12 13 ; PR1307 14 @str = internal constant [5 x i8] c"foog\00" 15 @str1 = internal constant [8 x i8] c"blahhh!\00" 16 @str2 = internal constant [5 x i8] c"Ponk\00" 17 18 define i8* @test1() { 19 %tmp3 = tail call i8* @strchr( i8* getelementptr ([5 x i8], [5 x i8]* @str, i32 0, i32 2), i32 103 ) ; <i8*> [#uses=1] 20 ret i8* %tmp3 21 22 ; CHECK-LABEL: @test1( 23 ; CHECK: ret i8* getelementptr inbounds ([5 x i8], [5 x i8]* @str, i32 0, i32 3) 24 } 25 26 declare i8* @strchr(i8*, i32) 27 28 define i8* @test2() { 29 %tmp3 = tail call i8* @strchr( i8* getelementptr ([8 x i8], [8 x i8]* @str1, i32 0, i32 2), i32 0 ) ; <i8*> [#uses=1] 30 ret i8* %tmp3 31 32 ; CHECK-LABEL: @test2( 33 ; CHECK: ret i8* getelementptr inbounds ([8 x i8], [8 x i8]* @str1, i32 0, i32 7) 34 } 35 36 define i8* @test3() { 37 entry: 38 %tmp3 = tail call i8* @strchr( i8* getelementptr ([5 x i8], [5 x i8]* @str2, i32 0, i32 1), i32 80 ) ; <i8*> [#uses=1] 39 ret i8* %tmp3 40 41 ; CHECK-LABEL: @test3( 42 ; CHECK: ret i8* null 43 } 44 45 @_2E_str = external constant [5 x i8] ; <[5 x i8]*> [#uses=1] 46 47 declare i32 @memcmp(i8*, i8*, i32) nounwind readonly 48 49 define i1 @PR2341(i8** %start_addr) { 50 entry: 51 %tmp4 = load i8*, i8** %start_addr, align 4 ; <i8*> [#uses=1] 52 %tmp5 = call i32 @memcmp( i8* %tmp4, i8* getelementptr ([5 x i8], [5 x i8]* @_2E_str, i32 0, i32 0), i32 4 ) nounwind readonly ; <i32> [#uses=1] 53 %tmp6 = icmp eq i32 %tmp5, 0 ; <i1> [#uses=1] 54 ret i1 %tmp6 55 56 ; CHECK-LABEL: @PR2341( 57 ; CHECK: i32 58 } 59 60 define i32 @PR4284() nounwind { 61 entry: 62 %c0 = alloca i8, align 1 ; <i8*> [#uses=2] 63 %c2 = alloca i8, align 1 ; <i8*> [#uses=2] 64 store i8 64, i8* %c0 65 store i8 -127, i8* %c2 66 %call = call i32 @memcmp(i8* %c0, i8* %c2, i32 1) ; <i32> [#uses=1] 67 ret i32 %call 68 69 ; CHECK-LABEL: @PR4284( 70 ; CHECK: ret i32 -65 71 } 72 73 %struct.__sFILE = type { i8*, i32, i32, i16, i16, %struct.__sbuf, i32, i8*, i32 (i8*)*, i32 (i8*, i8*, i32)*, i64 (i8*, i64, i32)*, i32 (i8*, i8*, i32)*, %struct.__sbuf, i8*, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i64, %struct.pthread_mutex*, %struct.pthread*, i32, i32, %union.anon } 74 %struct.__sbuf = type { i8*, i32, [4 x i8] } 75 %struct.pthread = type opaque 76 %struct.pthread_mutex = type opaque 77 %union.anon = type { i64, [120 x i8] } 78 @.str13 = external constant [2 x i8] ; <[2 x i8]*> [#uses=1] 79 @.str14 = external constant [2 x i8] ; <[2 x i8]*> [#uses=1] 80 81 define i32 @PR4641(i32 %argc, i8** %argv) nounwind { 82 entry: 83 call void @exit(i32 0) nounwind 84 %cond392 = select i1 undef, i8* getelementptr ([2 x i8], [2 x i8]* @.str13, i32 0, i32 0), i8* getelementptr ([2 x i8], [2 x i8]* @.str14, i32 0, i32 0) ; <i8*> [#uses=1] 85 %call393 = call %struct.__sFILE* @fopen(i8* undef, i8* %cond392) nounwind ; <%struct.__sFILE*> [#uses=0] 86 unreachable 87 } 88 89 declare %struct.__sFILE* @fopen(i8*, i8*) 90 91 declare void @exit(i32) 92 93 define i32 @PR4645() { 94 entry: 95 br label %if.then 96 97 lor.lhs.false: ; preds = %while.body 98 br i1 undef, label %if.then, label %for.cond 99 100 if.then: ; preds = %lor.lhs.false, %while.body 101 call void @exit(i32 1) 102 br label %for.cond 103 104 for.cond: ; preds = %for.end, %if.then, %lor.lhs.false 105 %j.0 = phi i32 [ %inc47, %for.end ], [ 0, %if.then ], [ 0, %lor.lhs.false ] ; <i32> [#uses=1] 106 unreachable 107 108 for.end: ; preds = %for.cond20 109 %inc47 = add i32 %j.0, 1 ; <i32> [#uses=1] 110 br label %for.cond 111 } 112 113 @h = constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=1] 114 @hel = constant [4 x i8] c"hel\00" ; <[4 x i8]*> [#uses=1] 115 @hello_u = constant [8 x i8] c"hello_u\00" ; <[8 x i8]*> [#uses=1] 116 117 define i32 @MemCpy() { 118 %h_p = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 119 %hel_p = getelementptr [4 x i8], [4 x i8]* @hel, i32 0, i32 0 120 %hello_u_p = getelementptr [8 x i8], [8 x i8]* @hello_u, i32 0, i32 0 121 %target = alloca [1024 x i8] 122 %target_p = getelementptr [1024 x i8], [1024 x i8]* %target, i32 0, i32 0 123 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %target_p, i8* %h_p, i32 2, i32 2, i1 false) 124 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %target_p, i8* %hel_p, i32 4, i32 4, i1 false) 125 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %target_p, i8* %hello_u_p, i32 8, i32 8, i1 false) 126 ret i32 0 127 128 ; CHECK-LABEL: @MemCpy( 129 ; CHECK-NOT: llvm.memcpy 130 ; CHECK: ret i32 0 131 } 132 133 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind 134 135 declare i32 @strcmp(i8*, i8*) #0 136 137 define void @test9(i8* %x) { 138 ; CHECK-LABEL: @test9( 139 ; CHECK-NOT: strcmp 140 %y = call i32 @strcmp(i8* %x, i8* %x) #1 141 ret void 142 } 143 144 attributes #0 = { nobuiltin } 145 attributes #1 = { builtin } 146
