[llvm] Simplify Patterns (PR #102221)

[Simon Pilgrim via llvm-commits]

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@@ -3803,12 +3803,7 @@ static unsigned ComputeNumSignBitsImpl(const Value *V,
     case Instruction::SDiv: {
       const APInt *Denominator;
       // sdiv X, C -> adds log(C) sign bits.
-      if (match(U->getOperand(1), m_APInt(Denominator))) {
-
-        // Ignore non-positive denominator.
-        if (!Denominator->isStrictlyPositive())
-          break;
-
+      if (match(U->getOperand(1), m_StrictlyPositive(Denominator))) {
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RKSimon wrote:

Aren't you now allowing poison values with m_StrictlyPositive whereas m_APInt didn't allow them?

https://github.com/llvm/llvm-project/pull/102221