1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test lib call simplification of __strcpy_chk calls with various values 3; for src, dst, and slen. 4; 5; RUN: opt < %s -passes=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 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 @a 19; 20 21 %ret = call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 60) 22 ret ptr %ret 23} 24 25define ptr @test_simplify1_tail() { 26; CHECK-LABEL: @test_simplify1_tail( 27; 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) 28; CHECK-NEXT: ret ptr @a 29; 30 31 %ret = tail call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 60) 32 ret ptr %ret 33} 34 35define ptr @test_simplify2() { 36; CHECK-LABEL: @test_simplify2( 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 @a 39; 40 41 %ret = call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 12) 42 ret ptr %ret 43} 44 45define ptr @test_simplify3() { 46; CHECK-LABEL: @test_simplify3( 47; 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) 48; CHECK-NEXT: ret ptr @a 49; 50 51 %ret = call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 -1) 52 ret ptr %ret 53} 54 55; Check cases where there are no string constants. 56 57define ptr @test_simplify4() { 58; CHECK-LABEL: @test_simplify4( 59; CHECK-NEXT: [[STRCPY:%.*]] = call ptr @strcpy(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(1) @b) 60; CHECK-NEXT: ret ptr @a 61; 62 63 %ret = call ptr @__strcpy_chk(ptr @a, ptr @b, i32 -1) 64 ret ptr %ret 65} 66 67define ptr @test_simplify4_tail() { 68; CHECK-LABEL: @test_simplify4_tail( 69; CHECK-NEXT: [[STRCPY:%.*]] = tail call ptr @strcpy(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(1) @b) 70; CHECK-NEXT: ret ptr @a 71; 72 73 %ret = tail call ptr @__strcpy_chk(ptr @a, ptr @b, i32 -1) 74 ret ptr %ret 75} 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: [[RET:%.*]] = call ptr @__memcpy_chk(ptr nonnull @a, ptr nonnull @.str, i32 12, i32 [[LEN]]) 83; CHECK-NEXT: ret ptr [[RET]] 84; 85 86 %len = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false) 87 %ret = call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 %len) 88 ret ptr %ret 89} 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: [[LEN:%.*]] = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false) 96; CHECK-NEXT: [[RET:%.*]] = call ptr @__strcpy_chk(ptr nonnull @a, ptr nonnull @a, i32 [[LEN]]) 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 @__strcpy_chk(ptr @a, ptr @a, i32 %len) 102 ret ptr %ret 103} 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: [[STRCPY:%.*]] = tail call ptr @strcpy(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(1) @b) 110; CHECK-NEXT: ret ptr @a 111; 112 113 %ret = tail call ptr @__strcpy_chk(ptr @a, ptr @b, i32 -1) 114 ret ptr %ret 115} 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 @__strcpy_chk(ptr nonnull @a, ptr nonnull @b, i32 8) 122; CHECK-NEXT: ret ptr [[RET]] 123; 124 125 %ret = call ptr @__strcpy_chk(ptr @a, ptr @b, i32 8) 126 ret ptr %ret 127} 128 129define ptr @test_no_simplify2(ptr %dst, ptr %src, i32 %a) { 130; CHECK-LABEL: @test_no_simplify2( 131; CHECK-NEXT: [[RET:%.*]] = musttail call ptr @__strcpy_chk(ptr [[DST:%.*]], ptr [[SRC:%.*]], i32 60) 132; CHECK-NEXT: ret ptr [[RET]] 133; 134 %ret = musttail call ptr @__strcpy_chk(ptr %dst, ptr %src, i32 60) 135 ret ptr %ret 136} 137 138declare ptr @__strcpy_chk(ptr, ptr, i32) nounwind 139declare i32 @llvm.objectsize.i32.p0(ptr, i1, i1, i1) nounwind readonly 140