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| author | Bill Wendling <isanbard@gmail.com> | 2013-05-21 22:11:11 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2013-05-21 22:11:11 +0000 |
| commit | 3d3a37ed4d2bf264bd47a672efadd2f550f485f7 (patch) | |
| tree | 91d730b15a702fb627d2ad3848c42bbb95b3a301 /lib | |
| parent | 629c73232cd79e223b684f2d569e83b63f87f1f6 (diff) | |
| download | llvm-3d3a37ed4d2bf264bd47a672efadd2f550f485f7.tar.gz llvm-3d3a37ed4d2bf264bd47a672efadd2f550f485f7.tar.bz2 llvm-3d3a37ed4d2bf264bd47a672efadd2f550f485f7.tar.xz | |
Merging r182385:
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r182385 | hfinkel | 2013-05-21 07:21:09 -0700 (Tue, 21 May 2013) | 9 lines
Fix PPC branch selection for counter-based branches
Although I had added some support for the BDZ/BDNZ branches into the selector
(in r158204), I had not correctly adjusted the condition at the top of the
loop. As a result, these branches were still essentially unsupported.
This fixes PR16086. Unfortunately, any test case would be very large (because
it would need to force the loop backedge to exceed the range of the 16-bit
immediate).
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_33@182431 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/PowerPC/PPCBranchSelector.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/lib/Target/PowerPC/PPCBranchSelector.cpp b/lib/Target/PowerPC/PPCBranchSelector.cpp index bd1c378681..3e608ca8f6 100644 --- a/lib/Target/PowerPC/PPCBranchSelector.cpp +++ b/lib/Target/PowerPC/PPCBranchSelector.cpp @@ -112,15 +112,21 @@ bool PPCBSel::runOnMachineFunction(MachineFunction &Fn) { unsigned MBBStartOffset = 0; for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I) { - if (I->getOpcode() != PPC::BCC || I->getOperand(2).isImm()) { + MachineBasicBlock *Dest = 0; + if (I->getOpcode() == PPC::BCC && !I->getOperand(2).isImm()) + Dest = I->getOperand(2).getMBB(); + else if ((I->getOpcode() == PPC::BDNZ8 || I->getOpcode() == PPC::BDNZ || + I->getOpcode() == PPC::BDZ8 || I->getOpcode() == PPC::BDZ) && + !I->getOperand(0).isImm()) + Dest = I->getOperand(0).getMBB(); + + if (!Dest) { MBBStartOffset += TII->GetInstSizeInBytes(I); continue; } // Determine the offset from the current branch to the destination // block. - MachineBasicBlock *Dest = I->getOperand(2).getMBB(); - int BranchSize; if (Dest->getNumber() <= MBB.getNumber()) { // If this is a backwards branch, the delta is the offset from the |