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

[Yingwei Zheng via llvm-commits]

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@@ -165,8 +165,8 @@ class Type {
   bool isPPC_FP128Ty() const { return getTypeID() == PPC_FP128TyID; }
 
   /// Return true if this is a well-behaved IEEE-like type, which has a IEEE
-  /// compatible layout as defined by APFloat::isIEEE(), and does not have
-  /// non-IEEE values, such as x86_fp80's unnormal values.
+  /// compatible layout, and does not have non-IEEE values, such as x86_fp80's
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dtcxzyw wrote:

See https://github.com/llvm/llvm-project/pull/130557. Now we check this property explicitly.

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