[PATCH] Added llvm.is.constant intrinsic

[Rafael Avila de Espindola]

Ccing nick since it seems related to the enable_if attribute.

> On Jun 25, 2014, at 11:22, Janusz Sobczak <janusz.sobczak at mobica.com> wrote:
> 
> ================
> Comment at: test/CodeGen/Generic/inline-is-constant.ll:4
> @@ +3,3 @@
> +; Expected outcome: @fun is inlined and @llvm.is.constant is resolved to TRUE
> +; Without inlining @llvm.is.constant would resolve to FALSE.
> +
> ----------------
> Renato Golin wrote:
>> a more robust way would be to have two run lines, one with O0, another with O3, and use FileCheck for the True/False results.
> If using lli is frowned upon, then the resolution is to call 'llc -debug' and search for the debug strings with FileCheck
> 
> http://reviews.llvm.org/D4276
> 
> 
> 
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