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Set CCR (EFLAGS) copy cost to -1, i.e. extremely expensive to copy.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42124 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-09-19 01:36:39 +00:00
parent a3ca3149f2
commit dcfa73fe3c
1 changed files with 3 additions and 1 deletions
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4
lib/Target/X86/X86RegisterInfo.td
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@ -521,4 +521,6 @@ def VR128 : RegisterClass<"X86", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],128,
}
// Status flags registers.
def CCR : RegisterClass<"X86", [i32], 32, [EFLAGS]>;
def CCR : RegisterClass<"X86", [i32], 32, [EFLAGS]> {
let CopyCost = -1; // Don't allow copying of status registers.
}