1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test that the stpcpy library call simplifier works correctly. 3; RUN: opt < %s -instcombine -S | FileCheck %s 4; 5; This transformation requires the pointer size, as it assumes that size_t is 6; the size of a pointer. 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-n8:16:32" 8 9@hello = constant [6 x i8] c"hello\00" 10@a = common global [32 x i8] zeroinitializer, align 1 11@b = common global [32 x i8] zeroinitializer, align 1 12 13declare i8* @stpcpy(i8*, i8*) 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(6) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false) 18; CHECK-NEXT: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 5) 19; 20 21 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 22 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 23 24 %ret = call i8* @stpcpy(i8* %dst, i8* %src) 25 ret i8* %ret 26} 27 28define i8* @test_simplify2() { 29; CHECK-LABEL: @test_simplify2( 30; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(i8* nonnull dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0)) 31; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [32 x i8], [32 x i8]* @a, i32 0, i32 [[STRLEN]] 32; CHECK-NEXT: ret i8* [[TMP1]] 33; 34 35 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 36 37 %ret = call i8* @stpcpy(i8* %dst, i8* %dst) 38 ret i8* %ret 39} 40 41define void @test_simplify3(i8* %dst) { 42; CHECK-LABEL: @test_simplify3( 43; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* nonnull align 1 dereferenceable(80) [[DST:%.*]], i8* nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false) 44; CHECK-NEXT: ret void 45; 46 47 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 48 49 call i8* @stpcpy(i8* dereferenceable(80) %dst, i8* %src) 50 ret void 51} 52 53define i8* @test_no_simplify1() { 54; CHECK-LABEL: @test_no_simplify1( 55; CHECK-NEXT: [[RET:%.*]] = call i8* @stpcpy(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([32 x i8], [32 x i8]* @b, i32 0, i32 0)) 56; CHECK-NEXT: ret i8* [[RET]] 57; 58 59 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 60 %src = getelementptr [32 x i8], [32 x i8]* @b, i32 0, i32 0 61 62 %ret = call i8* @stpcpy(i8* %dst, i8* %src) 63 ret i8* %ret 64} 65