Home | History | Annotate | Download | only in MemCpyOpt
      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-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, 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-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, 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-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, i32 1, i1 false)
     39   ret void
     40 }
     41