1; RUN: opt -S < %s -instcombine | FileCheck %s 2target 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 6declare i32 @sprintf(i8*, i8*, ...) 7 8define 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 18define 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 26declare i8* @strchr(i8*, i32) 27 28define 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 36define i8* @test3() { 37entry: 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 47declare i32 @memcmp(i8*, i8*, i32) nounwind readonly 48 49define i1 @PR2341(i8** %start_addr) { 50entry: 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 60define i32 @PR4284() nounwind { 61entry: 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 81define i32 @PR4641(i32 %argc, i8** %argv) nounwind { 82entry: 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 89declare %struct.__sFILE* @fopen(i8*, i8*) 90 91declare void @exit(i32) 92 93define i32 @PR4645() { 94entry: 95 br label %if.then 96 97lor.lhs.false: ; preds = %while.body 98 br i1 undef, label %if.then, label %for.cond 99 100if.then: ; preds = %lor.lhs.false, %while.body 101 call void @exit(i32 1) 102 br label %for.cond 103 104for.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 108for.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 117define 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* align 2 %target_p, i8* align 2 %h_p, i32 2, i1 false) 124 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %target_p, i8* align 4 %hel_p, i32 4, i1 false) 125 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %target_p, i8* align 8 %hello_u_p, 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 133declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind 134 135declare i32 @strcmp(i8*, i8*) #0 136 137define 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; PR30484 - https://llvm.org/bugs/show_bug.cgi?id=30484 145; These aren't the library functions you're looking for... 146 147declare i32 @isdigit(i8) 148declare i32 @isascii(i8) 149declare i32 @toascii(i8) 150 151define i32 @fake_isdigit(i8 %x) { 152; CHECK-LABEL: @fake_isdigit( 153; CHECK-NEXT: [[Y:%.*]] = call i32 @isdigit(i8 %x) 154; CHECK-NEXT: ret i32 [[Y]] 155; 156 %y = call i32 @isdigit(i8 %x) 157 ret i32 %y 158} 159 160define i32 @fake_isascii(i8 %x) { 161; CHECK-LABEL: @fake_isascii( 162; CHECK-NEXT: [[Y:%.*]] = call i32 @isascii(i8 %x) 163; CHECK-NEXT: ret i32 [[Y]] 164; 165 %y = call i32 @isascii(i8 %x) 166 ret i32 %y 167} 168 169define i32 @fake_toascii(i8 %x) { 170; CHECK-LABEL: @fake_toascii( 171; CHECK-NEXT: [[Y:%.*]] = call i32 @toascii(i8 %x) 172; CHECK-NEXT: ret i32 [[Y]] 173; 174 %y = call i32 @toascii(i8 %x) 175 ret i32 %y 176} 177 178 179attributes #0 = { nobuiltin } 180attributes #1 = { builtin } 181