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Only allocate non-volatile registers R13-31 (for now).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14500 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -73,9 +73,17 @@ def TBL : SPR<4>;
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def TBU : SPR<5>;
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/// Register classes: one for floats and another for non-floats.
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def GPRC : RegisterClass<i32, 4, [R0, R1, R2, R3, R4, R5, R6, R7,
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R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21,
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R22, R23, R24, R25, R26, R27, R28, R29, R30, R31]>;
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def GPRC : RegisterClass<i32, 4, [R13, R14, R15, R16, R17, R18, R19, R20, R21,
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R22, R23, R24, R25, R26, R27, R28, R29, R30,
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R31, R0, R1, R2, R3, R4, R5, R6, R7,
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R8, R9, R10, R11, R12]> {
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let Methods = [{
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iterator allocation_order_end(MachineFunction &MF) const {
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return end()-13; // do not allocate r0-r12
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}
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}];
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}
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def FPRC : RegisterClass<f64, 8, [F0, F1, F2, F3, F4, F5, F6, F7,
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F8, F9, F10, F11, F12, F13, F14, F15, F16, F17, F18, F19, F20, F21,
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F22, F23, F24, F25, F26, F27, F28, F29, F30, F31]>;
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