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| author | Jim Grosbach <grosbach@apple.com> | 2010-09-01 21:23:03 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2010-09-01 21:23:03 +0000 |
| commit | 269354e57024ab815bdb74f06cc6309a879d1f9f (patch) | |
| tree | 58e8664e890e9968ba30c34c9f8ebe981f5614d1 | |
| parent | 067a648599a99dc5a499e0241a85436fe6037c5a (diff) | |
| download | llvm-269354e57024ab815bdb74f06cc6309a879d1f9f.tar.gz llvm-269354e57024ab815bdb74f06cc6309a879d1f9f.tar.bz2 llvm-269354e57024ab815bdb74f06cc6309a879d1f9f.tar.xz | |
The register allocator shouldn't consider allocating reserved registers. PBQP version.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112742 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/RegAllocPBQP.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp index 0dd9214826..c6fdf04c7a 100644 --- a/lib/CodeGen/RegAllocPBQP.cpp +++ b/lib/CodeGen/RegAllocPBQP.cpp @@ -587,6 +587,8 @@ PBQP::Graph PBQPRegAlloc::constructPBQPProblem() { // Resize allowedSets container appropriately. allowedSets.resize(vregIntervalsToAlloc.size()); + BitVector ReservedRegs = tri->getReservedRegs(*mf); + // Iterate over virtual register intervals to compute allowed sets... for (unsigned node = 0; node < node2LI.size(); ++node) { @@ -595,8 +597,12 @@ PBQP::Graph PBQPRegAlloc::constructPBQPProblem() { const TargetRegisterClass *liRC = mri->getRegClass(li->reg); // Start by assuming all allocable registers in the class are allowed... - RegVector liAllowed(liRC->allocation_order_begin(*mf), - liRC->allocation_order_end(*mf)); + RegVector liAllowed; + TargetRegisterClass::iterator aob = liRC->allocation_order_begin(*mf); + TargetRegisterClass::iterator aoe = liRC->allocation_order_end(*mf); + for (TargetRegisterClass::iterator it = aob; it != aoe; ++it) + if (!ReservedRegs.test(*it)) + liAllowed.push_back(*it); // Eliminate the physical registers which overlap with this range, along // with all their aliases. |