[llvm] [C API] Add getters and setters for fast-math flags on relevant instructions (PR #75123)

[Nikita Popov via llvm-commits]

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@@ -3319,6 +3319,52 @@ void LLVMSetArgOperand(LLVMValueRef Funclet, unsigned i, LLVMValueRef value) {
 
 /*--.. Arithmetic ..........................................................--*/
 
+static FastMathFlags mapFromLLVMFastMathFlags(LLVMFastMathFlags FMF) {
+  FastMathFlags NewFMF;
+  // First, check if all bits are set
+  // If not, check each one explicitly
+  if (FMF == static_cast<LLVMFastMathFlags>(LLVMFastMathAll))
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nikic wrote:

Can drop this after defining LLVMFastMathAll correctly.

https://github.com/llvm/llvm-project/pull/75123