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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; Test lib call simplification of __stpcpy_chk calls with various values3; for src, dst, and slen.4;5; RUN: opt < %s -passes=instcombine -S | FileCheck %s6 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 110@b = common global [60 x i8] zeroinitializer, align 111@.str = private constant [12 x i8] c"abcdefghijk\00"12 13; Check cases where slen >= strlen (src).14 15define ptr @test_simplify1() {16; CHECK-LABEL: @test_simplify1(17; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(12) @a, ptr noundef nonnull align 1 dereferenceable(12) @.str, i32 12, i1 false)18; CHECK-NEXT: ret ptr getelementptr inbounds nuw (i8, ptr @a, i32 11)19;20 21 %ret = call ptr @__stpcpy_chk(ptr @a, ptr @.str, i32 60)22 ret ptr %ret23}24 25define ptr @test_simplify2() {26; CHECK-LABEL: @test_simplify2(27; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(12) @a, ptr noundef nonnull align 1 dereferenceable(12) @.str, i32 12, i1 false)28; CHECK-NEXT: ret ptr getelementptr inbounds nuw (i8, ptr @a, i32 11)29;30 31 %ret = call ptr @__stpcpy_chk(ptr @a, ptr @.str, i32 12)32 ret ptr %ret33}34 35define ptr @test_simplify3() {36; CHECK-LABEL: @test_simplify3(37; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(12) @a, ptr noundef nonnull align 1 dereferenceable(12) @.str, i32 12, i1 false)38; CHECK-NEXT: ret ptr getelementptr inbounds nuw (i8, ptr @a, i32 11)39;40 41 %ret = call ptr @__stpcpy_chk(ptr @a, ptr @.str, i32 -1)42 ret ptr %ret43}44 45define ptr @test_simplify1_tail() {46; CHECK-LABEL: @test_simplify1_tail(47; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(12) @a, ptr noundef nonnull align 1 dereferenceable(12) @.str, i32 12, i1 false)48; CHECK-NEXT: ret ptr getelementptr inbounds nuw (i8, ptr @a, i32 11)49;50 51 %ret = tail call ptr @__stpcpy_chk(ptr @a, ptr @.str, i32 60)52 ret ptr %ret53}54 55; Check cases where there are no string constants.56 57define ptr @test_simplify4() {58; CHECK-LABEL: @test_simplify4(59; CHECK-NEXT: [[STPCPY:%.*]] = call ptr @stpcpy(ptr nonnull @a, ptr nonnull @b)60; CHECK-NEXT: ret ptr [[STPCPY]]61;62 63 %ret = call ptr @__stpcpy_chk(ptr @a, ptr @b, i32 -1)64 ret ptr %ret65}66 67define ptr @test_simplify4_tail() {68; CHECK-LABEL: @test_simplify4_tail(69; CHECK-NEXT: [[STPCPY:%.*]] = tail call ptr @stpcpy(ptr nonnull @a, ptr nonnull @b)70; CHECK-NEXT: ret ptr [[STPCPY]]71;72 73 %ret = tail call ptr @__stpcpy_chk(ptr @a, ptr @b, i32 -1)74 ret ptr %ret75}76 77; Check case where the string length is not constant.78 79define ptr @test_simplify5() {80; CHECK-LABEL: @test_simplify5(81; CHECK-NEXT: [[LEN:%.*]] = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false)82; CHECK-NEXT: [[TMP1:%.*]] = call ptr @__memcpy_chk(ptr nonnull @a, ptr nonnull @.str, i32 12, i32 [[LEN]])83; CHECK-NEXT: ret ptr getelementptr inbounds nuw (i8, ptr @a, i32 11)84;85 86 %len = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false)87 %ret = call ptr @__stpcpy_chk(ptr @a, ptr @.str, i32 %len)88 ret ptr %ret89}90 91; Check case where the source and destination are the same.92 93define ptr @test_simplify6() {94; CHECK-LABEL: @test_simplify6(95; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(ptr noundef nonnull dereferenceable(1) @a)96; CHECK-NEXT: [[RET:%.*]] = getelementptr inbounds i8, ptr @a, i32 [[STRLEN]]97; CHECK-NEXT: ret ptr [[RET]]98;99 100 %len = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false)101 %ret = call ptr @__stpcpy_chk(ptr @a, ptr @a, i32 %len)102 ret ptr %ret103}104 105; Check cases where there are no string constants, and is a tail call.106 107define ptr @test_simplify7() {108; CHECK-LABEL: @test_simplify7(109; CHECK-NEXT: [[STPCPY:%.*]] = tail call ptr @stpcpy(ptr nonnull @a, ptr nonnull @b)110; CHECK-NEXT: ret ptr [[STPCPY]]111;112 113 %ret = tail call ptr @__stpcpy_chk(ptr @a, ptr @b, i32 -1)114 ret ptr %ret115}116 117; Check case where slen < strlen (src).118 119define ptr @test_no_simplify1() {120; CHECK-LABEL: @test_no_simplify1(121; CHECK-NEXT: [[RET:%.*]] = call ptr @__stpcpy_chk(ptr nonnull @a, ptr nonnull @b, i32 8)122; CHECK-NEXT: ret ptr [[RET]]123;124 125 %ret = call ptr @__stpcpy_chk(ptr @a, ptr @b, i32 8)126 ret ptr %ret127}128 129declare ptr @__stpcpy_chk(ptr, ptr, i32) nounwind130declare i32 @llvm.objectsize.i32.p0(ptr, i1, i1, i1) nounwind readonly131