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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-02-23 01:13:32 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-02-23 01:13:32 +0000 |
| commit | cf14613455bc32b6a17821808595263e061335bc (patch) | |
| tree | 6759db054bebc784b7000772b7f09d7cb8337e17 /lib/CodeGen/RegisterScavenging.cpp | |
| parent | c9addc40101d28766438c8b0cfad1a78fcd6fbf9 (diff) | |
| download | external_llvm-cf14613455bc32b6a17821808595263e061335bc.zip external_llvm-cf14613455bc32b6a17821808595263e061335bc.tar.gz external_llvm-cf14613455bc32b6a17821808595263e061335bc.tar.bz2 | |
Track reserved registers separately from RegsAvailable.
The bulk masking operations from register mask operands don't account
for reserved registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151222 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegisterScavenging.cpp')
| -rw-r--r-- | lib/CodeGen/RegisterScavenging.cpp | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp index bb31e0a..18523e5 100644 --- a/lib/CodeGen/RegisterScavenging.cpp +++ b/lib/CodeGen/RegisterScavenging.cpp @@ -59,9 +59,6 @@ void RegScavenger::initRegState() { // All registers started out unused. RegsAvailable.set(); - // Reserved registers are always used. - RegsAvailable ^= ReservedRegs; - if (!MBB) return; @@ -225,9 +222,11 @@ void RegScavenger::forward() { void RegScavenger::getRegsUsed(BitVector &used, bool includeReserved) { used = RegsAvailable; - if (!includeReserved) - used |= ReservedRegs; used.flip(); + if (includeReserved) + used |= ReservedRegs; + else + used.reset(ReservedRegs); } unsigned RegScavenger::FindUnusedReg(const TargetRegisterClass *RC) const { |