diff options
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index 6e00a552b6..402c54cadc 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -299,6 +299,16 @@ BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const { Reserved.set(X86::FS); Reserved.set(X86::GS); + // Mark the floating point stack registers as reserved. + Reserved.set(X86::ST0); + Reserved.set(X86::ST1); + Reserved.set(X86::ST2); + Reserved.set(X86::ST3); + Reserved.set(X86::ST4); + Reserved.set(X86::ST5); + Reserved.set(X86::ST6); + Reserved.set(X86::ST7); + // Reserve the registers that only exist in 64-bit mode. if (!Is64Bit) { // These 8-bit registers are part of the x86-64 extension even though their |