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Only allocate non-volatile registers R13-31 (for now).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14500 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman 2004-06-29 23:35:32 +00:00
parent 86a9a7a9c4
commit 8ee0100880
1 changed files with 11 additions and 3 deletions
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14
lib/Target/PowerPC/PPCRegisterInfo.td
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@ -73,9 +73,17 @@ def TBL : SPR<4>;
def TBU : SPR<5>;
/// Register classes: one for floats and another for non-floats.
def GPRC : RegisterClass<i32, 4, [R0, R1, R2, R3, R4, R5, R6, R7,
R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21,
R22, R23, R24, R25, R26, R27, R28, R29, R30, R31]>;
def GPRC : RegisterClass<i32, 4, [R13, R14, R15, R16, R17, R18, R19, R20, R21,
R22, R23, R24, R25, R26, R27, R28, R29, R30,
R31, R0, R1, R2, R3, R4, R5, R6, R7,
R8, R9, R10, R11, R12]> {
let Methods = [{
iterator allocation_order_end(MachineFunction &MF) const {
return end()-13; // do not allocate r0-r12
}
}];
}
def FPRC : RegisterClass<f64, 8, [F0, F1, F2, F3, F4, F5, F6, F7,
F8, F9, F10, F11, F12, F13, F14, F15, F16, F17, F18, F19, F20, F21,
F22, F23, F24, F25, F26, F27, F28, F29, F30, F31]>;