search for: pr36507

Specifying -no-implicit-float prevents LLVM from using non-GPR registers for purely integer operations. This is useful for operating systems (such as Wind River's VxWorks) that support tasks that do not save all registers on context switch. This presents an interesting problem for variadic functions that may optionally take non-integer arguments (e.g. printf style functions). Should non-GPR

...The use of floating point arguments should be considered as "explicit use FP" and therefore should be allowed by the spirit of -mno-implicit-float flag 5. We're having -mgeneral-regs-only these days, so more strict cases are properly recognized as well. Any thoughts? PS: This fixes PR36507 and the fix is in https://reviews.llvm.org/D62639 On Mon, Nov 27, 2017 at 6:01 PM Nasser, Salim via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Specifying -no-implicit-float prevents LLVM from using non-GPR registers for purely integer operations. This is useful for operating syst...