1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=instcombine -S | FileCheck %s 3 4declare void @llvm.memcpy.p0.p0.i32(ptr nocapture, ptr nocapture, i32, i1) nounwind 5declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind 6 7; Same src/dest. 8 9define void @test1(ptr %a) { 10; CHECK-LABEL: @test1( 11; CHECK-NEXT: ret void 12; 13 tail call void @llvm.memcpy.p0.p0.i32(ptr %a, ptr %a, i32 100, i1 false) 14 ret void 15} 16 17; PR8267 - same src/dest, but volatile. 18 19define void @test2(ptr %a) { 20; CHECK-LABEL: @test2( 21; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i32(ptr [[A:%.*]], ptr [[A]], i32 100, i1 true) 22; CHECK-NEXT: ret void 23; 24 tail call void @llvm.memcpy.p0.p0.i32(ptr %a, ptr %a, i32 100, i1 true) 25 ret void 26} 27 28; 17179869184 == 0x400000000 - make sure that doesn't get truncated to 32-bit. 29 30define void @test3(ptr %d, ptr %s) { 31; CHECK-LABEL: @test3( 32; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(17179869184) [[D:%.*]], ptr noundef nonnull align 4 dereferenceable(17179869184) [[S:%.*]], i64 17179869184, i1 false) 33; CHECK-NEXT: ret void 34; 35 tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %d, ptr align 4 %s, i64 17179869184, i1 false) 36 ret void 37} 38 39@UnknownConstant = external constant i128 40 41define void @memcpy_to_constant(ptr %src) { 42; CHECK-LABEL: @memcpy_to_constant( 43; CHECK-NEXT: ret void 44; 45 call void @llvm.memcpy.p0.p0.i32(ptr @UnknownConstant, ptr %src, i32 16, i1 false) 46 ret void 47} 48