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R600/SI: Disable copying of SCC 

llvm-svn: 219519
This commit is contained in:
Matt Arsenault 2014-10-10 17:44:47 +00:00
parent 497311ab99
commit a39da09eb6
1 changed files with 5 additions and 1 deletions
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6
llvm/lib/Target/R600/SIRegisterInfo.td
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@ -170,7 +170,11 @@ def VGPR_512 : RegisterTuples<[sub0, sub1, sub2, sub3, sub4, sub5, sub6, sub7,
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// Special register classes for predicates and the M0 register // Special register classes for predicates and the M0 register
def SCCReg : RegisterClass<"AMDGPU", [i32, i1], 32, (add SCC)>; def SCCReg : RegisterClass<"AMDGPU", [i32, i1], 32, (add SCC)> {
let CopyCost = -1; // Theoretically it is possible to read from SCC,
// but it should never be necessary.
}
def VCCReg : RegisterClass<"AMDGPU", [i64, i1], 64, (add VCC)>; def VCCReg : RegisterClass<"AMDGPU", [i64, i1], 64, (add VCC)>;
def EXECReg : RegisterClass<"AMDGPU", [i64, i1], 64, (add EXEC)>; def EXECReg : RegisterClass<"AMDGPU", [i64, i1], 64, (add EXEC)>;
def M0Reg : RegisterClass<"AMDGPU", [i32], 32, (add M0)>; def M0Reg : RegisterClass<"AMDGPU", [i32], 32, (add M0)>;