// r10 == Stack Limit
//
def GPR : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6,
- R7, R8, R9, R10, R12, R11,
- LR, SP, PC]> {
+ R7, R8, R9, R10, R11, R12,
+ SP, LR, PC]> {
let MethodProtos = [{
iterator allocation_order_begin(const MachineFunction &MF) const;
iterator allocation_order_end(const MachineFunction &MF) const;
}];
- // FIXME: We are reserving r12 in case the PEI needs to use it to
- // generate large stack offset. Make it available once we have register
- // scavenging. Similarly r3 is reserved in Thumb mode for now.
let MethodBodies = [{
// FP is R11, R9 is available.
static const unsigned ARM_GPR_AO_1[] = {
ARM::R4, ARM::R5, ARM::R6,
ARM::R8, ARM::R9, ARM::R10,ARM::R11,ARM::R7 };
+ // For Thumb1 mode, we don't want to allocate hi regs at all, as we
+ // don't know how to spill them. If we make our prologue/epilogue code
+ // smarter at some point, we can go back to using the above allocation
+ // orders for the Thumb1 instructions that know how to use hi regs.
+ static const unsigned THUMB_GPR_AO[] = {
+ ARM::R0, ARM::R1, ARM::R2, ARM::R3,
+ ARM::R4, ARM::R5, ARM::R6, ARM::R7 };
+
GPRClass::iterator
GPRClass::allocation_order_begin(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
+ if (Subtarget.isThumb1Only())
+ return THUMB_GPR_AO;
if (Subtarget.isTargetDarwin()) {
if (Subtarget.isR9Reserved())
return ARM_GPR_AO_4;
const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
GPRClass::iterator I;
+ if (Subtarget.isThumb1Only()) {
+ I = THUMB_GPR_AO + (sizeof(THUMB_GPR_AO)/sizeof(unsigned));
+ // Mac OS X requires FP not to be clobbered for backtracing purpose.
+ return (Subtarget.isTargetDarwin() || RI->hasFP(MF)) ? I-1 : I;
+ }
+
if (Subtarget.isTargetDarwin()) {
if (Subtarget.isR9Reserved())
I = ARM_GPR_AO_4 + (sizeof(ARM_GPR_AO_4)/sizeof(unsigned));
// Subset of DPR that are accessible with VFP2 (and so that also have
// 32-bit SPR subregs).
-def DPR_VFP2 : RegisterClass<"ARM", [f64, v2i32, v2f32], 64,
+def DPR_VFP2 : RegisterClass<"ARM", [f64, v8i8, v4i16, v2i32, v1i64, v2f32], 64,
[D0, D1, D2, D3, D4, D5, D6, D7,
D8, D9, D10, D11, D12, D13, D14, D15]> {
let SubRegClassList = [SPR, SPR];
// Subset of DPR which can be used as a source of NEON scalars for 16-bit
// operations
-def DPR_8 : RegisterClass<"ARM", [f64, v4i16, v2f32], 64,
+def DPR_8 : RegisterClass<"ARM", [f64, v8i8, v4i16, v2i32, v1i64, v2f32], 64,
[D0, D1, D2, D3, D4, D5, D6, D7]> {
let SubRegClassList = [SPR_8, SPR_8];
}
let SubRegClassList = [SPR, SPR, SPR, SPR, DPR_VFP2, DPR_VFP2];
}
+// Subset of QPR that have DPR_8 and SPR_8 subregs.
+def QPR_8 : RegisterClass<"ARM", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
+ 128,
+ [Q0, Q1, Q2, Q3]> {
+ let SubRegClassList = [SPR_8, SPR_8, SPR_8, SPR_8, DPR_8, DPR_8];
+}
+
// Condition code registers.
def CCR : RegisterClass<"ARM", [i32], 32, [CPSR]>;