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First chunk of MachineInstr bundle support.

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1. Added opcode BUNDLE
2. Taught MachineInstr class to deal with bundled MIs
3. Changed MachineBasicBlock iterator to skip over bundled MIs; added an iterator to walk all the MIs
4. Taught MachineBasicBlock methods about bundled MIs


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145975 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2011-12-06 22:12:01 +00:00
parent 3d5d8f6b76
commit 7c2a4a30e0
19 changed files with 369 additions and 69 deletions
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3
lib/CodeGen/TailDuplication.cpp
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@ -561,8 +561,7 @@ TailDuplicatePass::shouldTailDuplicate(const MachineFunction &MF,
// Check the instructions in the block to determine whether tail-duplication
// is invalid or unlikely to be profitable.
unsigned InstrCount = 0;
for (MachineBasicBlock::const_iterator I = TailBB.begin(); I != TailBB.end();
++I) {
for (MachineBasicBlock::iterator I = TailBB.begin(); I != TailBB.end(); ++I) {
// Non-duplicable things shouldn't be tail-duplicated.
if (I->getDesc().isNotDuplicable())
return false;