[llvm] 0950533 - [RISCV] Move call to EmitLoweredCascadedSelect above some variable declarations. NFC

[Craig Topper via llvm-commits]

Author: Craig Topper
Date: 2024-07-22T10:37:45-07:00
New Revision: 0950533cff55478af0eb802c3698ff5a4e94bb73

URL: https://github.com/llvm/llvm-project/commit/0950533cff55478af0eb802c3698ff5a4e94bb73
DIFF: https://github.com/llvm/llvm-project/commit/0950533cff55478af0eb802c3698ff5a4e94bb73.diff

LOG: [RISCV] Move call to EmitLoweredCascadedSelect above some variable declarations. NFC

These variables aren't used if we call EmitLoweredCascadedSelect
so move the call above them.

Added: 
    

Modified: 
    llvm/lib/Target/RISCV/RISCVISelLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 12d0e1d6ccb48..823fb428472ef 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -18418,6 +18418,15 @@ static MachineBasicBlock *emitSelectPseudo(MachineInstr &MI,
   // Select_FPRX_ (rs1, rs2, imm, rs4, (Select_FPRX_ rs1, rs2, imm, rs4, rs5))
   // is checked here and handled by a separate function -
   // EmitLoweredCascadedSelect.
+
+  auto Next = next_nodbg(MI.getIterator(), BB->instr_end());
+  if ((MI.getOpcode() != RISCV::Select_GPR_Using_CC_GPR &&
+       MI.getOpcode() != RISCV::Select_GPR_Using_CC_Imm) &&
+      Next != BB->end() && Next->getOpcode() == MI.getOpcode() &&
+      Next->getOperand(5).getReg() == MI.getOperand(0).getReg() &&
+      Next->getOperand(5).isKill())
+    return EmitLoweredCascadedSelect(MI, *Next, BB, Subtarget);
+
   Register LHS = MI.getOperand(1).getReg();
   Register RHS;
   if (MI.getOperand(2).isReg())
@@ -18429,15 +18438,6 @@ static MachineBasicBlock *emitSelectPseudo(MachineInstr &MI,
   SelectDests.insert(MI.getOperand(0).getReg());
 
   MachineInstr *LastSelectPseudo = &MI;
-  auto Next = next_nodbg(MI.getIterator(), BB->instr_end());
-  if ((MI.getOpcode() != RISCV::Select_GPR_Using_CC_GPR &&
-       MI.getOpcode() != RISCV::Select_GPR_Using_CC_Imm) &&
-      Next != BB->end() && Next->getOpcode() == MI.getOpcode() &&
-      Next->getOperand(5).getReg() == MI.getOperand(0).getReg() &&
-      Next->getOperand(5).isKill()) {
-    return EmitLoweredCascadedSelect(MI, *Next, BB, Subtarget);
-  }
-
   for (auto E = BB->end(), SequenceMBBI = MachineBasicBlock::iterator(MI);
        SequenceMBBI != E; ++SequenceMBBI) {
     if (SequenceMBBI->isDebugInstr())