[LLVMdev] [PATCH] CPUID for Win64

[Chris Lattner]

On Apr 24, 2009, at 4:16 AM, Nicolas Capens wrote:

> Hi all,
>
> Please consider applying the attached patch. Currently on Windows  
> x86-64 the processor features are not detected because the inline  
> assembly (which Visual C++ deprecated for x64) does not have an  
> alternative that uses intrinsics. Later tests for x86-64 then only  
> enable SSE2, leaving any more recent instruction set unused.
>
> The patch uses the __cpuid intrinsic that compile under 32-bit as  
> well as 64-bit. I’ve only tested it with my own experimental project  
> on Windows x64 but I see no potential issues for other platforms. A  
> potential additional improvement would be to cause a compiler error  
> when the GetCpuIDAndInfo does not compile to the intended code, and  
> to remove the test that follows right  
> afterAutoDetectSubtargetFeatures() has been called.
>

Applied, thanks!
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090420/076691.html

-Chris
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