[llvm-commits] [llvm] r51659 - /llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp

[Bill Wendling]

Author: void
Date: Wed May 28 17:52:47 2008
New Revision: 51659

URL: http://llvm.org/viewvc/llvm-project?rev=51659&view=rev
Log:
Check the "isSafeToMove" predicate, which has a series of tests to make sure
that it's safe to remat an instruction.

Modified:
    llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp

Modified: llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp?rev=51659&r1=51658&r2=51659&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp (original)
+++ llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp Wed May 28 17:52:47 2008
@@ -330,8 +330,10 @@
         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 {