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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-08-31 21:51:07 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-08-31 21:51:07 +0000 |
| commit | 63b1dbaadd4bb70a6fcb84db880fc34d72b9a956 (patch) | |
| tree | 8b727b005bb4962e878efdd8f6a93dc83ac0aaf1 /lib/Target/X86/X86RegisterInfo.td | |
| parent | f14a648d80bcb45fa07db35f8f1f58e47111dc9e (diff) | |
| download | llvm-63b1dbaadd4bb70a6fcb84db880fc34d72b9a956.tar.gz llvm-63b1dbaadd4bb70a6fcb84db880fc34d72b9a956.tar.bz2 llvm-63b1dbaadd4bb70a6fcb84db880fc34d72b9a956.tar.xz | |
Make %EFLAGS unallocatable.
No CCR virtual registers should exist, and %EFLAGS is used in ways that can
surprise RegAllocFast.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112650 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86RegisterInfo.td')
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.td | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.td b/lib/Target/X86/X86RegisterInfo.td index 176e87812d..95269b1576 100644 --- a/lib/Target/X86/X86RegisterInfo.td +++ b/lib/Target/X86/X86RegisterInfo.td @@ -833,4 +833,15 @@ def VR256 : RegisterClass<"X86", [v32i8, v8i32, v4i64, v8f32, v4f64], 256, // Status flags registers. def CCR : RegisterClass<"X86", [i32], 32, [EFLAGS]> { let CopyCost = -1; // Don't allow copying of status registers. + + // EFLAGS is not allocatable. + let MethodProtos = [{ + iterator allocation_order_end(const MachineFunction &MF) const; + }]; + let MethodBodies = [{ + CCRClass::iterator + CCRClass::allocation_order_end(const MachineFunction &MF) const { + return allocation_order_begin(MF); + } + }]; } |