| ; RUN: opt < %s -basicaa -memcpyopt -S | FileCheck %s |
| ; These memmoves should get optimized to memcpys. |
| |
| 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" |
| target triple = "x86_64-apple-darwin9.0" |
| |
| declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind |
| |
| define i8* @test1(i8* nocapture %src) nounwind { |
| entry: |
| ; CHECK: @test1 |
| ; CHECK: call void @llvm.memcpy |
| |
| %malloccall = tail call i8* @malloc(i32 trunc (i64 mul nuw (i64 ptrtoint (i8* getelementptr (i8* null, i32 1) to i64), i64 13) to i32)) |
| %call3 = bitcast i8* %malloccall to [13 x i8]* |
| %call3.sub = getelementptr inbounds [13 x i8]* %call3, i64 0, i64 0 |
| tail call void @llvm.memmove.p0i8.p0i8.i64(i8* %call3.sub, i8* %src, i64 13, i32 1, i1 false) |
| ret i8* %call3.sub |
| } |
| declare noalias i8* @malloc(i32) |
| |
| |
| define void @test2(i8* %P) nounwind { |
| entry: |
| ; CHECK: @test2 |
| ; CHECK: call void @llvm.memcpy |
| %add.ptr = getelementptr i8* %P, i64 16 |
| tail call void @llvm.memmove.p0i8.p0i8.i64(i8* %P, i8* %add.ptr, i64 16, i32 1, i1 false) |
| ret void |
| } |
| |
| ; This cannot be optimize because the src/dst really do overlap. |
| define void @test3(i8* %P) nounwind { |
| entry: |
| ; CHECK: @test3 |
| ; CHECK: call void @llvm.memmove |
| %add.ptr = getelementptr i8* %P, i64 16 |
| tail call void @llvm.memmove.p0i8.p0i8.i64(i8* %P, i8* %add.ptr, i64 17, i32 1, i1 false) |
| ret void |
| } |