Remove the memmove->memcpy optimization from CodeGen. MemCpyOpt does this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118789 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index b9dbfc0f369d7dd2d084a5f3c9207a1660125ffc..62d2cb9a79bf4f50c62f3ee9216c5d94f10a50ed 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4086,20 +4086,6 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
     SDValue Op3 = getValue(I.getArgOperand(2));
     unsigned Align = cast<ConstantInt>(I.getArgOperand(3))->getZExtValue();
     bool isVol = cast<ConstantInt>(I.getArgOperand(4))->getZExtValue();
-
-    // If the source and destination are known to not be aliases, we can
-    // lower memmove as memcpy.
-    uint64_t Size = -1ULL;
-    if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op3))
-      Size = C->getZExtValue();
-    if (AA->alias(I.getArgOperand(0), Size, I.getArgOperand(1), Size) ==
-        AliasAnalysis::NoAlias) {
-      DAG.setRoot(DAG.getMemcpy(getRoot(), dl, Op1, Op2, Op3, Align, isVol,
-                                false, MachinePointerInfo(I.getArgOperand(0)),
-                                MachinePointerInfo(I.getArgOperand(1))));
-      return 0;
-    }
-
     DAG.setRoot(DAG.getMemmove(getRoot(), dl, Op1, Op2, Op3, Align, isVol,
                                MachinePointerInfo(I.getArgOperand(0)),
                                MachinePointerInfo(I.getArgOperand(1))));

diff --git a/test/CodeGen/X86/memmove-0.ll b/test/CodeGen/X86/memmove-0.ll
deleted file mode 100644 (file)
index c1194fa..0000000
--- a/test/CodeGen/X86/memmove-0.ll
+++ /dev/null
@@ -1,9 +0,0 @@
-; RUN: llc < %s -march=x86 -mtriple=i686-pc-linux-gnu | grep {calll    memcpy}
-
-declare void @llvm.memmove.i64(i8* %d, i8* %s, i64 %l, i32 %a)
-
-define void @foo(i8* noalias %d, i8* noalias %s, i64 %l)
-{
-  call void @llvm.memmove.i64(i8* %d, i8* %s, i64 %l, i32 1)
-  ret void
-}

diff --git a/test/CodeGen/X86/memmove-1.ll b/test/CodeGen/X86/memmove-1.ll
deleted file mode 100644 (file)
index 712d55f..0000000
--- a/test/CodeGen/X86/memmove-1.ll
+++ /dev/null
@@ -1,9 +0,0 @@
-; RUN: llc < %s -march=x86 -mtriple=i686-pc-linux-gnu | grep {calll    memmove}
-
-declare void @llvm.memmove.i64(i8* %d, i8* %s, i64 %l, i32 %a)
-
-define void @foo(i8* %d, i8* %s, i64 %l)
-{
-  call void @llvm.memmove.i64(i8* %d, i8* %s, i64 %l, i32 1)
-  ret void
-}

diff --git a/test/CodeGen/X86/memmove-2.ll b/test/CodeGen/X86/memmove-2.ll
deleted file mode 100644 (file)
index 68a9f4d..0000000
--- a/test/CodeGen/X86/memmove-2.ll
+++ /dev/null
@@ -1,9 +0,0 @@
-; RUN: llc < %s -march=x86 -mtriple=i686-pc-linux-gnu | not grep call
-
-declare void @llvm.memmove.i64(i8* %d, i8* %s, i64 %l, i32 %a)
-
-define void @foo(i8* noalias %d, i8* noalias %s)
-{
-  call void @llvm.memmove.i64(i8* %d, i8* %s, i64 32, i32 1)
-  ret void
-}

diff --git a/test/CodeGen/X86/memmove-3.ll b/test/CodeGen/X86/memmove-3.ll
deleted file mode 100644 (file)
index 99c13c8..0000000
--- a/test/CodeGen/X86/memmove-3.ll
+++ /dev/null
@@ -1,9 +0,0 @@
-; RUN: llc < %s -march=x86 -mtriple=i686-pc-linux-gnu | grep {calll    memmove}
-
-declare void @llvm.memmove.i64(i8* %d, i8* %s, i64 %l, i32 %a)
-
-define void @foo(i8* %d, i8* %s)
-{
-  call void @llvm.memmove.i64(i8* %d, i8* %s, i64 32, i32 1)
-  ret void
-}