[Patch] Only pass f32/v4f32 in xmm registers in x86-64 if only sse1 is suppored

[Demikhovsky, Elena]

FP passed in XMM starting from SSE2.

Intel SSE processor did not support 64-bit mode and all parameters were in FP stack (X87) registers.

-           Elena

From: llvm-commits-bounces at cs.uiuc.edu [mailto:llvm-commits-bounces at cs.uiuc.edu] On Behalf Of Craig Topper
Sent: Thursday, October 10, 2013 07:00
To: llvm-commits at cs.uiuc.edu
Subject: [Patch] Only pass f32/v4f32 in xmm registers in x86-64 if only sse1 is suppored

Not sure if this is actually the right thing to do, but it fixes an issue on llvm-dev where XMM->FP copy was being created.

This patches makes integer vector types and f64 only pass in xmm if sse2 is enabled which is when these types are assigned to the xmm class.

--
~Craig
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