commit a8db14796b22ba7798ef94fc831d56c8a11d4e2a
author Bill Wendling <isanbard@gmail.com> Wed May 28 22:52:47 2008 +0000
committer Bill Wendling <isanbard@gmail.com> Wed May 28 22:52:47 2008 +0000
tree 9536bba7b5957e577c50dd4eec7090e75cd3d2a9
parent 745825f431920662e97bdab5c1bcfac62e48c52f

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

lib/CodeGen/TwoAddressInstructionPass.cpp

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 145f80a..5f0a923 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -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 {