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Modify the -join-globalcopies option (off by default).

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Always coalesce in forward order to propagate rematerialization.
I'm fixing this option so I can enable it by default soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184568 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2013-06-21 18:33:09 +00:00
parent b5f906b98f
commit 0db6df0d96
1 changed files with 2 additions and 2 deletions

4
lib/CodeGen/RegisterCoalescer.cpp

@ -2117,8 +2117,8 @@ RegisterCoalescer::copyCoalesceInMBB(MachineBasicBlock *MBB) {
// are not inherently easier to resolve, but slightly preferable until we
// have local live range splitting. In particular this is required by
// cmp+jmp macro fusion.
for (MachineBasicBlock::reverse_iterator
MII = MBB->rbegin(), E = MBB->rend(); MII != E; ++MII) {
for (MachineBasicBlock::iterator MII = MBB->begin(), E = MBB->end();
MII != E; ++MII) {
if (!MII->isCopyLike())
continue;
if (isLocalCopy(&(*MII), LIS))