diff options
| author | Jim Grosbach <grosbach@apple.com> | 2010-09-01 22:48:34 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2010-09-01 22:48:34 +0000 |
| commit | 188da252ab1b20bdb368e8f64a97c0fa4d5f5d66 (patch) | |
| tree | 0125fd932e61b6ba7cfe8f3b114747e8bcb5aee7 /lib/CodeGen/RegAllocLinearScan.cpp | |
| parent | 97511ceffa47d71c805b58143a24c78cdba2a5c1 (diff) | |
Tweak to ignoring reserved regs. The allocator was occasionally still looking
at them since they'd end up in the register weights list. Tell it to stop
doing that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112756 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegAllocLinearScan.cpp')
| -rw-r--r-- | lib/CodeGen/RegAllocLinearScan.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp index 32dda273d0..5c62354a88 100644 --- a/lib/CodeGen/RegAllocLinearScan.cpp +++ b/lib/CodeGen/RegAllocLinearScan.cpp @@ -1147,9 +1147,11 @@ void RALinScan::assignRegOrStackSlotAtInterval(LiveInterval* cur) { e = RC->allocation_order_end(*mf_); i != e; ++i) { unsigned reg = *i; float regWeight = SpillWeights[reg]; + // Don't even consider reserved regs. + if (reservedRegs_.test(reg)) + continue; // Skip recently allocated registers and reserved registers. - if (minWeight > regWeight && !isRecentlyUsed(reg) && - !reservedRegs_.test(reg)) + if (minWeight > regWeight && !isRecentlyUsed(reg)) Found = true; RegsWeights.push_back(std::make_pair(reg, regWeight)); } |