commit 273f7e42994a5bce0614d04d96dbfdf05fd652e5
author Jakob Stoklund Olesen <stoklund@2pi.dk> Sat Jul 03 00:04:37 2010 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Sat Jul 03 00:04:37 2010 +0000
tree 5963df402c4f6ba2641e0e869ddafa71fd5aa850
parent 43b8fd728b889f15ea4c65ca957a7420ce2905cd

Detect and handle COPY in many places.

This code is transitional, it will soon be possible to eliminate
isExtractSubreg, isInsertSubreg, and isMoveInstr in most places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107547 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/ProcessImplicitDefs.cpp

diff --git a/lib/CodeGen/ProcessImplicitDefs.cpp b/lib/CodeGen/ProcessImplicitDefs.cpp
index 62f525f..0195918 100644
--- a/lib/CodeGen/ProcessImplicitDefs.cpp
+++ b/lib/CodeGen/ProcessImplicitDefs.cpp
@@ -46,14 +46,15 @@
                                                  const TargetInstrInfo *tii_) {
   unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
   if (tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubReg, DstSubReg) &&
-      Reg == SrcReg && SrcSubReg == 0 && DstSubReg == 0)
+      Reg == SrcReg && DstSubReg == 0)
     return true;
 
-  if (OpIdx == 2 && MI->isSubregToReg())
-    return true;
-  if (OpIdx == 1 && MI->isExtractSubreg())
-    return true;
-  return false;
+  switch(OpIdx) {
+    case 1: return (MI->isExtractSubreg() || MI->isCopy()) &&
+                   MI->getOperand(0).getSubReg() == 0;
+    case 2: return MI->isSubregToReg() && MI->getOperand(0).getSubReg() == 0;
+    default: return false;
+  }
 }
 
 /// processImplicitDefs - Process IMPLICIT_DEF instructions and make sure
@@ -219,8 +220,10 @@
 
         // Turn a copy use into an implicit_def.
         unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-        if (tii_->isMoveInstr(*RMI, SrcReg, DstReg, SrcSubReg, DstSubReg) &&
-            Reg == SrcReg && SrcSubReg == 0 && DstSubReg == 0) {
+        if ((RMI->isCopy() && RMI->getOperand(1).getReg() == Reg &&
+             RMI->getOperand(0).getSubReg() == 0) ||
+            (tii_->isMoveInstr(*RMI, SrcReg, DstReg, SrcSubReg, DstSubReg) &&
+             Reg == SrcReg && DstSubReg == 0)) {
           RMI->setDesc(tii_->get(TargetOpcode::IMPLICIT_DEF));
 
           bool isKill = false;