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