X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=test%2FTransforms%2FMemCpyOpt%2Fmemcpy-undef.ll;h=9d8db7e07dc98caace9eae084256e465324a955c;hp=fd4965f4dc5bc27c79e0b7a45292e86ac10d93a1;hb=8b170f7f290843dc3849eaa75b6f74a87a7a2de6;hpb=44e40408eebdd38831501fc2fab59d550e951808

diff --git a/test/Transforms/MemCpyOpt/memcpy-undef.ll b/test/Transforms/MemCpyOpt/memcpy-undef.ll
index fd4965f4dc5..9d8db7e07dc 100644
--- a/test/Transforms/MemCpyOpt/memcpy-undef.ll
+++ b/test/Transforms/MemCpyOpt/memcpy-undef.ll
@@ -7,12 +7,12 @@ target triple = "x86_64-apple-macosx10.8.0"
 
 define i32 @test1(%struct.foo* nocapture %foobie) nounwind noinline ssp uwtable {
   %bletch.sroa.1 = alloca [7 x i8], align 1
-  %1 = getelementptr inbounds %struct.foo* %foobie, i64 0, i32 0
+  %1 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 0
   store i8 98, i8* %1, align 4
-  %2 = getelementptr inbounds %struct.foo* %foobie, i64 0, i32 1, i64 0
-  %3 = getelementptr inbounds [7 x i8]* %bletch.sroa.1, i64 0, i64 0
-  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %3, i64 7, i32 1, i1 false)
-  %4 = getelementptr inbounds %struct.foo* %foobie, i64 0, i32 2
+  %2 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 1, i64 0
+  %3 = getelementptr inbounds [7 x i8], [7 x i8]* %bletch.sroa.1, i64 0, i64 0
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %3, i64 7, i1 false)
+  %4 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 2
   store i32 20, i32* %4, align 4
   ret i32 undef
 
@@ -21,5 +21,26 @@ define i32 @test1(%struct.foo* nocapture %foobie) nounwind noinline ssp uwtable
 ; CHECK-NOT: call void @llvm.memcpy
 }
 
-declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
+define void @test2(i8* sret noalias nocapture %out, i8* %in) nounwind noinline ssp uwtable {
+  call void @llvm.lifetime.start(i64 8, i8* %in)
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %out, i8* %in, i64 8, i1 false)
+  ret void
 
+; Check that the memcpy is removed.
+; CHECK-LABEL: @test2(
+; CHECK-NOT: call void @llvm.memcpy
+}
+
+define void @test3(i8* sret noalias nocapture %out, i8* %in) nounwind noinline ssp uwtable {
+  call void @llvm.lifetime.start(i64 4, i8* %in)
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %out, i8* %in, i64 8, i1 false)
+  ret void
+
+; Check that the memcpy is not removed.
+; CHECK-LABEL: @test3(
+; CHECK: call void @llvm.memcpy
+}
+
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
+
+declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind