[llvm] [IR][ADT][InstCombine] Remove `APFloat/Type::isIEEE` (PR #130496)

[Matt Arsenault via llvm-commits]

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@@ -4851,18 +4845,15 @@ Instruction *InstCombinerImpl::visitXor(BinaryOperator &I) {
     // This is generous interpretation of noimplicitfloat, this is not a true
     // floating-point operation.
     //
-    // Assumes any IEEE-represented type has the sign bit in the high bit.
+    // Assumes any floating point type has the sign bit in the high bit.
     // TODO: Unify with APInt matcher. This version allows undef unlike m_APInt
     Value *CastOp;
     if (match(Op0, m_ElementWiseBitCast(m_Value(CastOp))) &&
-        match(Op1, m_SignMask()) &&
+        CastOp->getType()->isFPOrFPVectorTy() && match(Op1, m_SignMask()) &&
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arsenm wrote:

These changes with behavior change should be done separately 

https://github.com/llvm/llvm-project/pull/130496