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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-02-15 23:42:54 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-02-15 23:42:54 +0000 |
commit | a230262791397c88beeb7ca9bb97c8a8a026e848 (patch) | |
tree | 7fd8481d43710b3af30a7d8abad71731ac2b0c9e /lib/CodeGen/BranchFolding.cpp | |
parent | e746186ed4f61bf5eba13112cb8419c95cf58e52 (diff) | |
download | llvm-a230262791397c88beeb7ca9bb97c8a8a026e848.tar.gz llvm-a230262791397c88beeb7ca9bb97c8a8a026e848.tar.bz2 llvm-a230262791397c88beeb7ca9bb97c8a8a026e848.tar.xz |
Handle register masks in branch folding.
Don't attempt to move instructions with regmask operands. They are most
likely calls anyway.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150634 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/BranchFolding.cpp')
-rw-r--r-- | lib/CodeGen/BranchFolding.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp index 4929e38890..6aa170b536 100644 --- a/lib/CodeGen/BranchFolding.cpp +++ b/lib/CodeGen/BranchFolding.cpp @@ -1477,6 +1477,9 @@ MachineBasicBlock::iterator findHoistingInsertPosAndDeps(MachineBasicBlock *MBB, bool IsDef = false; for (unsigned i = 0, e = PI->getNumOperands(); !IsDef && i != e; ++i) { const MachineOperand &MO = PI->getOperand(i); + // If PI has a regmask operand, it is probably a call. Separate away. + if (MO.isRegMask()) + return Loc; if (!MO.isReg() || MO.isUse()) continue; unsigned Reg = MO.getReg(); @@ -1589,6 +1592,11 @@ bool BranchFolder::HoistCommonCodeInSuccs(MachineBasicBlock *MBB) { bool IsSafe = true; for (unsigned i = 0, e = TIB->getNumOperands(); i != e; ++i) { MachineOperand &MO = TIB->getOperand(i); + // Don't attempt to hoist instructions with register masks. + if (MO.isRegMask()) { + IsSafe = false; + break; + } if (!MO.isReg()) continue; unsigned Reg = MO.getReg(); |