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| author | Evan Cheng <evan.cheng@apple.com> | 2008-03-11 07:16:00 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-03-11 07:16:00 +0000 |
| commit | 204496d58e7e740f0da6d41c6214a91d67950d26 (patch) | |
| tree | 154cf2ee6cd4bde6ced84dc7cf96fab19d41f062 | |
| parent | de13acf862f952925ee2c977da64b03d7716c63b (diff) | |
In 32-bit mode, mark 64-bit GPR's as unallocatable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48217 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.td | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.td b/lib/Target/X86/X86RegisterInfo.td index 93d2a510fb..24402386c8 100644 --- a/lib/Target/X86/X86RegisterInfo.td +++ b/lib/Target/X86/X86RegisterInfo.td @@ -415,6 +415,9 @@ def GR64 : RegisterClass<"X86", [i64], 64, GR64Class::allocation_order_end(const MachineFunction &MF) const { const TargetMachine &TM = MF.getTarget(); const TargetRegisterInfo *RI = TM.getRegisterInfo(); + const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>(); + if (!Subtarget.is64Bit()) + return begin(); // None of these are allocatable in 32-bit. if (RI->hasFP(MF)) // Does the function dedicate RBP to being a frame ptr? return end()-2; // If so, don't allocate RSP or RBP else |