1; RUN: opt < %s -basicaa -memcpyopt -S | FileCheck %s 2; These memmoves should get optimized to memcpys. 3 4target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" 5target triple = "x86_64-apple-darwin9.0" 6 7declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind 8 9define i8* @test1(i8* nocapture %src) nounwind { 10entry: 11; CHECK-LABEL: @test1( 12; CHECK: call void @llvm.memcpy 13 14 %malloccall = tail call i8* @malloc(i32 trunc (i64 mul nuw (i64 ptrtoint (i8* getelementptr (i8, i8* null, i32 1) to i64), i64 13) to i32)) 15 %call3 = bitcast i8* %malloccall to [13 x i8]* 16 %call3.sub = getelementptr inbounds [13 x i8], [13 x i8]* %call3, i64 0, i64 0 17 tail call void @llvm.memmove.p0i8.p0i8.i64(i8* %call3.sub, i8* %src, i64 13, i1 false) 18 ret i8* %call3.sub 19} 20declare noalias i8* @malloc(i32) 21 22 23define void @test2(i8* %P) nounwind { 24entry: 25; CHECK-LABEL: @test2( 26; CHECK: call void @llvm.memcpy 27 %add.ptr = getelementptr i8, i8* %P, i64 16 28 tail call void @llvm.memmove.p0i8.p0i8.i64(i8* %P, i8* %add.ptr, i64 16, i1 false) 29 ret void 30} 31 32; This cannot be optimize because the src/dst really do overlap. 33define void @test3(i8* %P) nounwind { 34entry: 35; CHECK-LABEL: @test3( 36; CHECK: call void @llvm.memmove 37 %add.ptr = getelementptr i8, i8* %P, i64 16 38 tail call void @llvm.memmove.p0i8.p0i8.i64(i8* %P, i8* %add.ptr, i64 17, i1 false) 39 ret void 40} 41