1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=memcpyopt,instcombine -S < %s -verify-memoryssa | FileCheck %s 3 4target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128" 5target triple = "x86_64-unknown-linux-gnu" 6 7define void @foo(ptr noalias nocapture sret([8 x i64]) dereferenceable(64) %sret) { 8; CHECK-LABEL: @foo( 9; CHECK-NEXT: entry-block: 10; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) [[SRET:%.*]], i8 0, i64 64, i1 false) 11; CHECK-NEXT: ret void 12; 13entry-block: 14 %a = alloca [8 x i64], align 8 15 call void @llvm.lifetime.start.p0(i64 64, ptr %a) 16 call void @llvm.memset.p0.i64(ptr align 8 %a, i8 0, i64 64, i1 false) 17 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %sret, ptr align 8 %a, i64 64, i1 false) 18 call void @llvm.lifetime.end.p0(i64 64, ptr %a) 19 ret void 20 21} 22 23define void @bar(ptr noalias nocapture sret([8 x i64]) dereferenceable(64) %sret, ptr noalias nocapture dereferenceable(64) %out) { 24; CHECK-LABEL: @bar( 25; CHECK-NEXT: entry-block: 26; CHECK-NEXT: [[A:%.*]] = alloca [8 x i64], align 8 27; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 64, ptr nonnull [[A]]) 28; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) [[A]], i8 0, i64 64, i1 false) 29; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) [[SRET:%.*]], i8 0, i64 64, i1 false) 30; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) [[A]], i8 42, i64 32, i1 false) 31; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) [[OUT:%.*]], ptr noundef nonnull align 8 dereferenceable(64) [[A]], i64 64, i1 false) 32; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 64, ptr nonnull [[A]]) 33; CHECK-NEXT: ret void 34; 35entry-block: 36 %a = alloca [8 x i64], align 8 37 call void @llvm.lifetime.start.p0(i64 64, ptr %a) 38 call void @llvm.memset.p0.i64(ptr align 8 %a, i8 0, i64 64, i1 false) 39 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %sret, ptr align 8 %a, i64 64, i1 false) 40 call void @llvm.memset.p0.i64(ptr align 8 %a, i8 42, i64 32, i1 false) 41 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %out, ptr align 8 %a, i64 64, i1 false) 42 call void @llvm.lifetime.end.p0(i64 64, ptr %a) 43 ret void 44 45} 46 47declare void @llvm.lifetime.start.p0(i64, ptr nocapture) nounwind 48declare void @llvm.lifetime.end.p0(i64, ptr nocapture) nounwind 49 50declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1) nounwind 51declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind 52