// shrink VReg's register class within reason. For example, if VReg == GR32
// and II requires a GR32_NOSP, just constrain VReg to GR32_NOSP.
if (II) {
- const TargetRegisterClass *DstRC = nullptr;
+ const TargetRegisterClass *OpRC = nullptr;
if (IIOpNum < II->getNumOperands())
- DstRC = TRI->getAllocatableClass(TII->getRegClass(*II,IIOpNum,TRI,*MF));
- assert((!DstRC || TargetRegisterInfo::isVirtualRegister(VReg)) &&
- "Expected VReg");
- if (DstRC && !MRI->constrainRegClass(VReg, DstRC, MinRCSize)) {
- unsigned NewVReg = MRI->createVirtualRegister(DstRC);
- BuildMI(*MBB, InsertPos, Op.getNode()->getDebugLoc(),
- TII->get(TargetOpcode::COPY), NewVReg).addReg(VReg);
- VReg = NewVReg;
+ OpRC = TII->getRegClass(*II, IIOpNum, TRI, *MF);
+
+ if (OpRC) {
+ const TargetRegisterClass *ConstrainedRC
+ = MRI->constrainRegClass(VReg, OpRC, MinRCSize);
+ if (!ConstrainedRC) {
+ unsigned NewVReg = MRI->createVirtualRegister(OpRC);
+ BuildMI(*MBB, InsertPos, Op.getNode()->getDebugLoc(),
+ TII->get(TargetOpcode::COPY), NewVReg).addReg(VReg);
+ VReg = NewVReg;
+ } else {
+ assert(ConstrainedRC->isAllocatable() &&
+ "Constraining an allocatable VReg produced an unallocatable class?");
+ }
}
}
/// \returns true if this class contains VGPR registers.
bool hasVGPRs(const TargetRegisterClass *RC) const;
- /// returns true if this is a pseudoregister class combination of VGPRs and
- /// SGPRs for operand modeling. FIXME: We should set isAllocatable = 0 on
- /// them.
- static bool isPseudoRegClass(const TargetRegisterClass *RC) {
- return RC == &AMDGPU::VS_32RegClass || RC == &AMDGPU::VS_64RegClass;
- }
-
/// \returns A VGPR reg class with the same width as \p SRC
const TargetRegisterClass *getEquivalentVGPRClass(
const TargetRegisterClass *SRC) const;
let Size = 32;
}
-def VS_32 : RegisterClass<"AMDGPU", [i32, f32], 32, (add VGPR_32, SReg_32)>;
+def VS_32 : RegisterClass<"AMDGPU", [i32, f32], 32, (add VGPR_32, SReg_32)> {
+ let isAllocatable = 0;
+}
def VS_64 : RegisterClass<"AMDGPU", [i64, f64], 32, (add VReg_64, SReg_64)> {
- let CopyCost = 2;
+ let isAllocatable = 0;
}
//===----------------------------------------------------------------------===//