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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-04-25 16:17:50 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-04-25 16:17:50 +0000 |
commit | 40a2b653e165b5afc2f612b4b3edbb54a7b5eb59 (patch) | |
tree | 0bb21f3c1b85bb608d9daa2bf33e034c54b9ece3 /lib/CodeGen/RegisterCoalescer.cpp | |
parent | a2404e3458ca7d570802ca296240733f2aa41098 (diff) | |
download | external_llvm-40a2b653e165b5afc2f612b4b3edbb54a7b5eb59.zip external_llvm-40a2b653e165b5afc2f612b4b3edbb54a7b5eb59.tar.gz external_llvm-40a2b653e165b5afc2f612b4b3edbb54a7b5eb59.tar.bz2 |
Remove the -disable-cross-class-join option.
Cross-class joins have been normal and fully supported for a while now.
With TableGen generating the getMatchingSuperRegClass() hook, they are
unlikely to cause problems again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155552 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegisterCoalescer.cpp')
-rw-r--r-- | lib/CodeGen/RegisterCoalescer.cpp | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/lib/CodeGen/RegisterCoalescer.cpp b/lib/CodeGen/RegisterCoalescer.cpp index a82a589..16b9a7d 100644 --- a/lib/CodeGen/RegisterCoalescer.cpp +++ b/lib/CodeGen/RegisterCoalescer.cpp @@ -63,11 +63,6 @@ EnableJoining("join-liveintervals", cl::init(true)); static cl::opt<bool> -DisableCrossClassJoin("disable-cross-class-join", - cl::desc("Avoid coalescing cross register class copies"), - cl::init(false), cl::Hidden); - -static cl::opt<bool> EnablePhysicalJoin("join-physregs", cl::desc("Join physical register copies"), cl::init(false), cl::Hidden); @@ -1094,14 +1089,10 @@ bool RegisterCoalescer::JoinCopy(MachineInstr *CopyMI, bool &Again) { return false; } } else { - // Avoid constraining virtual register regclass too much. - if (CP.isCrossClass()) { - DEBUG(dbgs() << "\tCross-class to " << CP.getNewRC()->getName() << ".\n"); - if (DisableCrossClassJoin) { - DEBUG(dbgs() << "\tCross-class joins disabled.\n"); - return false; - } - } + DEBUG({ + if (CP.isCrossClass()) + dbgs() << "\tCross-class to " << CP.getNewRC()->getName() << ".\n"; + }); // When possible, let DstReg be the larger interval. if (!CP.getSubIdx() && LIS->getInterval(CP.getSrcReg()).ranges.size() > |