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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; Test lib call simplification of __strncpy_chk calls with various values3; for len and dstlen.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 dstlen >= len14 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 @a19;20 21 %ret = call ptr @__strncpy_chk(ptr @a, ptr @.str, i32 12, 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 @a29;30 31 %ret = call ptr @__strncpy_chk(ptr @a, ptr @.str, i32 12, i32 12)32 ret ptr %ret33}34 35define ptr @test_simplify3() {36; CHECK-LABEL: @test_simplify3(37; CHECK-NEXT: [[STRNCPY:%.*]] = call ptr @strncpy(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(1) @b, i32 12)38; CHECK-NEXT: ret ptr @a39;40 41 %ret = call ptr @__strncpy_chk(ptr @a, ptr @b, i32 12, i32 60)42 ret ptr %ret43}44 45; Check cases where dstlen < len46 47define ptr @test_no_simplify1() {48; CHECK-LABEL: @test_no_simplify1(49; CHECK-NEXT: [[RET:%.*]] = call ptr @__strncpy_chk(ptr nonnull @a, ptr nonnull @.str, i32 8, i32 4)50; CHECK-NEXT: ret ptr [[RET]]51;52 53 %ret = call ptr @__strncpy_chk(ptr @a, ptr @.str, i32 8, i32 4)54 ret ptr %ret55}56 57define ptr @test_no_simplify2() {58; CHECK-LABEL: @test_no_simplify2(59; CHECK-NEXT: [[RET:%.*]] = call ptr @__strncpy_chk(ptr nonnull @a, ptr nonnull @b, i32 8, i32 0)60; CHECK-NEXT: ret ptr [[RET]]61;62 63 %ret = call ptr @__strncpy_chk(ptr @a, ptr @b, i32 8, i32 0)64 ret ptr %ret65}66 67declare ptr @__strncpy_chk(ptr, ptr, i32, i32)68