diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-08-18 21:14:54 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-08-18 21:14:54 +0000 |
| commit | c0823fe7c679ca8f7d1667a310c2fca97b9402d5 (patch) | |
| tree | 2106aeae81f3562cd04d6387d271ab62e0770706 /lib/Target/ARM/ARMLoadStoreOptimizer.cpp | |
| parent | 1123135dbfa776bbe4c2120a16098d81e0850a76 (diff) | |
Simplify RegScavenger::FindUnusedReg.
- Drop the Candidates argument and fix all callers. Now that RegScavenger
tracks available registers accurately, there is no need to restict the
search.
- Make sure that no aliases of the found register are in use. This was a potential bug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79369 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/ARMLoadStoreOptimizer.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMLoadStoreOptimizer.cpp | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp index 3c6778fe8c..d927dd202e 100644 --- a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp +++ b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp @@ -941,12 +941,8 @@ bool ARMLoadStoreOpt::LoadStoreMultipleOpti(MachineBasicBlock &MBB) { // Try to find a free register to use as a new base in case it's needed. // First advance to the instruction just before the start of the chain. AdvanceRS(MBB, MemOps); - // Find a scratch register. Make sure it's a call clobbered register or - // a spilled callee-saved register. - unsigned Scratch = RS->FindUnusedReg(&ARM::GPRRegClass, true); - if (!Scratch) - Scratch = RS->FindUnusedReg(&ARM::GPRRegClass, - AFI->getSpilledCSRegisters()); + // Find a scratch register. + unsigned Scratch = RS->FindUnusedReg(&ARM::GPRRegClass); // Process the load / store instructions. RS->forward(prior(MBBI)); |