From: Bill Wendling <isanbard@gmail.com>
Date: Wed, 28 May 2008 22:52:47 +0000 (+0000)
Subject: Check the "isSafeToMove" predicate, which has a series of tests to make sure
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a8db14796b22ba7798ef94fc831d56c8a11d4e2a;p=oota-llvm.git

Check the "isSafeToMove" predicate, which has a series of tests to make sure
that it's safe to remat an instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51659 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 145f80ae74b..5f0a923f996 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -330,8 +330,10 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
         InstructionRearranged:
           const TargetRegisterClass* rc = MF.getRegInfo().getRegClass(regA);
           MachineInstr *Orig = MRI->getVRegDef(regB);
+          bool SawStore = false;
 
-          if (EnableReMat && Orig && TII->isTriviallyReMaterializable(Orig)) {
+          if (EnableReMat && Orig && Orig->isSafeToMove(TII, SawStore) &&
+              TII->isTriviallyReMaterializable(Orig)) {
             TII->reMaterialize(*mbbi, mi, regA, Orig);
             ReMattedInstrs.insert(Orig);
           } else {