[llvm] [Hexagon] Fuse vminub intrinsic pair (PR #225153)

[Santanu Das via llvm-commits]

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@@ -274,9 +295,82 @@ bool HexagonPeephole::runOnMachineFunction(MachineFunction &MF) {
 
     } // Instruction
   } // Basic Block
+
+  if (FuseIntrinsicVMinUB)
+    Changed |= fuseIntrinsicVMinUB(MF);
+
+  return Changed;
+}
+
+// Return true if both instructions have identical input operands in order.
+static bool hasCommonInputOps(const MachineInstr *I1, const MachineInstr *I2) {
+  if (I1->getNumOperands() != I2->getNumOperands())
+    return false;
+
+  for (unsigned i = 0, e = I1->getNumOperands(); i != e; ++i) {
+    const MachineOperand &Op1 = I1->getOperand(i);
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quic-santdas wrote:

Nitpick: if one instruction has 2 inputs and 1 output, another has 2 output and 1 input, this will cause a exception. better to also add a check for presence of operand first.

https://github.com/llvm/llvm-project/pull/225153