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canJoinPhys method doesn't modify CoalescerPair. Make it const.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167972 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakub Staszak 2012-11-14 20:31:04 +00:00
parent 08639983de
commit 39c71da6db
1 changed files with 2 additions and 2 deletions
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4
lib/CodeGen/RegisterCoalescer.cpp
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@ -178,7 +178,7 @@ namespace {
MachineInstr *CopyMI);
/// canJoinPhys - Return true if a physreg copy should be joined.
bool canJoinPhys(CoalescerPair &CP);
bool canJoinPhys(const CoalescerPair &CP);
/// updateRegDefsUses - Replace all defs and uses of SrcReg to DstReg and
/// update the subregister number if it is not zero. If DstReg is a
@ -928,7 +928,7 @@ void RegisterCoalescer::updateRegDefsUses(unsigned SrcReg,
}
/// canJoinPhys - Return true if a copy involving a physreg should be joined.
bool RegisterCoalescer::canJoinPhys(CoalescerPair &CP) {
bool RegisterCoalescer::canJoinPhys(const CoalescerPair &CP) {
/// Always join simple intervals that are defined by a single copy from a
/// reserved register. This doesn't increase register pressure, so it is
/// always beneficial.