diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-06-01 22:38:17 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-06-01 22:38:17 +0000 |
| commit | 8c70ea47fae6d61441d150cbe9431cf5e06222e5 (patch) | |
| tree | b5bbd422a9021a0024185e1d2cf5ee606ac0d941 /lib/CodeGen/RegisterScavenging.cpp | |
| parent | 2090766f6e9fe8fee892e89c114bcc284c8ff8ef (diff) | |
| download | llvm-8c70ea47fae6d61441d150cbe9431cf5e06222e5.tar.gz llvm-8c70ea47fae6d61441d150cbe9431cf5e06222e5.tar.bz2 llvm-8c70ea47fae6d61441d150cbe9431cf5e06222e5.tar.xz | |
Simplify some more getAliasSet callers.
MCRegAliasIterator can include Reg itself in the list.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157848 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegisterScavenging.cpp')
| -rw-r--r-- | lib/CodeGen/RegisterScavenging.cpp | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp index 03bd82e225..c965d8715b 100644 --- a/lib/CodeGen/RegisterScavenging.cpp +++ b/lib/CodeGen/RegisterScavenging.cpp @@ -43,10 +43,8 @@ void RegScavenger::setUsed(unsigned Reg) { } bool RegScavenger::isAliasUsed(unsigned Reg) const { - if (isUsed(Reg)) - return true; - for (const uint16_t *R = TRI->getAliasSet(Reg); *R; ++R) - if (isUsed(*R)) + for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) + if (isUsed(*AI)) return true; return false; } @@ -296,9 +294,8 @@ unsigned RegScavenger::findSurvivorReg(MachineBasicBlock::iterator StartMI, isVirtKillInsn = true; continue; } - Candidates.reset(MO.getReg()); - for (const uint16_t *R = TRI->getAliasSet(MO.getReg()); *R; R++) - Candidates.reset(*R); + for (MCRegAliasIterator AI(MO.getReg(), TRI, true); AI.isValid(); ++AI) + Candidates.reset(*AI); } // If we're not in a virtual reg's live range, this is a valid // restore point. |