[LLVMdev] [Clang] Reasons for lack of -fsingle-precision-constant support? Alternatives?

[ed at modk.it]

>
> > Still trying to get the bottom of why we're crashing with double
> floating point literal.  It seems the fpu in question (fpv4-sp-d16) only
> supports 32 bit operations so this is somehow getting passed to a software
> wrapper and crashing there.  But to be fair this was crashing in gcc too
> which is why we added the -fsingle-precision-constant flag since we didn't
> care about the precision of the constants and we're using floats everywhere
> anyway for performance.
>
> Shouldn't the code generator know to make the constants 32-bit if that's
> all the target supports? Or does it emulate 64-bit in software?


Yes I believe it is (trying to) emulate in software.  There's no
requirement to have an FPU at all so this is the expected behavior.
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