diff options
Diffstat (limited to 'lib/Target/X86/X86RegisterInfo.cpp')
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index 55842a4a2091..bc39cee34c4a 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -497,6 +497,9 @@ BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const { BitVector Reserved(getNumRegs()); const X86FrameLowering *TFI = getFrameLowering(MF); + // Set the floating point control register as reserved. + Reserved.set(X86::FPCW); + // Set the stack-pointer register and its aliases as reserved. for (MCSubRegIterator I(X86::RSP, this, /*IncludeSelf=*/true); I.isValid(); ++I) |