1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test lib call simplification of __stpcpy_chk calls with various values 3; for src, dst, and slen. 4; 5; RUN: opt < %s -instcombine -S | FileCheck %s 6 7target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" 8 9@a = common global [60 x i8] zeroinitializer, align 1 10@b = common global [60 x i8] zeroinitializer, align 1 11@.str = private constant [12 x i8] c"abcdefghijk\00" 12 13; Check cases where slen >= strlen (src). 14 15define i8* @test_simplify1() { 16; CHECK-LABEL: @test_simplify1( 17; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false) 18; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 11) 19; 20 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 21 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0 22 23 %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 60) 24 ret i8* %ret 25} 26 27define i8* @test_simplify2() { 28; CHECK-LABEL: @test_simplify2( 29; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false) 30; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 11) 31; 32 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 33 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0 34 35 %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 12) 36 ret i8* %ret 37} 38 39define i8* @test_simplify3() { 40; CHECK-LABEL: @test_simplify3( 41; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false) 42; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 11) 43; 44 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 45 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0 46 47 %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 -1) 48 ret i8* %ret 49} 50 51; Check cases where there are no string constants. 52 53define i8* @test_simplify4() { 54; CHECK-LABEL: @test_simplify4( 55; CHECK-NEXT: [[STPCPY:%.*]] = call i8* @stpcpy(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0)) 56; CHECK-NEXT: ret i8* [[STPCPY]] 57; 58 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 59 %src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0 60 61 %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 -1) 62 ret i8* %ret 63} 64 65; Check case where the string length is not constant. 66 67define i8* @test_simplify5() { 68; CHECK-LABEL: @test_simplify5( 69; CHECK-NEXT: [[LEN:%.*]] = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i1 false, i1 false, i1 false) 70; CHECK-NEXT: [[TMP1:%.*]] = call i8* @__memcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i32 [[LEN]]) 71; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 11) 72; 73 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 74 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0 75 76 %len = call i32 @llvm.objectsize.i32.p0i8(i8* %dst, i1 false, i1 false, i1 false) 77 %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 %len) 78 ret i8* %ret 79} 80 81; Check case where the source and destination are the same. 82 83define i8* @test_simplify6() { 84; CHECK-LABEL: @test_simplify6( 85; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(i8* nonnull dereferenceable(1) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)) 86; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 [[STRLEN]] 87; CHECK-NEXT: ret i8* [[TMP1]] 88; 89 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 90 91 %len = call i32 @llvm.objectsize.i32.p0i8(i8* %dst, i1 false, i1 false, i1 false) 92 %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %dst, i32 %len) 93 ret i8* %ret 94} 95 96; Check case where slen < strlen (src). 97 98define i8* @test_no_simplify1() { 99; CHECK-LABEL: @test_no_simplify1( 100; CHECK-NEXT: [[RET:%.*]] = call i8* @__stpcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0), i32 8) 101; CHECK-NEXT: ret i8* [[RET]] 102; 103 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 104 %src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0 105 106 %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 8) 107 ret i8* %ret 108} 109 110declare i8* @__stpcpy_chk(i8*, i8*, i32) nounwind 111declare i32 @llvm.objectsize.i32.p0i8(i8*, i1, i1, i1) nounwind readonly 112