diff options
Diffstat (limited to 'lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp')
| -rw-r--r-- | lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp b/lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp index 3fe16a713c..b3cee40176 100644 --- a/lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp +++ b/lib/Target/AMDGPU/R600ExpandSpecialInstrs.cpp @@ -184,10 +184,36 @@ bool R600ExpandSpecialInstrsPass::runOnMachineFunction(MachineFunction &MF) { MachineInstr &MI = *I; I = llvm::next(I); - if (ExpandInputPerspective(MI)) - continue; - if (ExpandInputConstant(MI)) - continue; + switch (MI.getOpcode()) { + default: break; + // Expand PRED_X to one of the PRED_SET instructions. + case AMDGPU::PRED_X: { + uint64_t Flags = MI.getOperand(3).getImm(); + // The native opcode used by PRED_X is stored as an immediate in the + // third operand. + MachineInstr *PredSet = TII->buildDefaultInstruction(MBB, I, + MI.getOperand(2).getImm(), // opcode + MI.getOperand(0).getReg(), // dst + MI.getOperand(1).getReg(), // src0 + AMDGPU::ZERO); // src1 + TII->addFlag(PredSet, 0, MO_FLAG_MASK); + if (Flags & MO_FLAG_PUSH) { + PredSet->getOperand(TII->getOperandIdx( + *PredSet, R600Operands::UPDATE_EXEC_MASK)).setImm(1); + } else { + PredSet->getOperand( + TII->getOperandIdx( + *PredSet, R600Operands::UPDATE_PREDICATE)).setImm(1); + } + MI.eraseFromParent(); + continue; + } + } + + if (ExpandInputPerspective(MI)) + continue; + if (ExpandInputConstant(MI)) + continue; bool IsReduction = TII->isReductionOp(MI.getOpcode()); bool IsVector = TII->isVector(MI); |