Attachment 173705 Details for Bug 211864 – Import upstream fix to stop using xsave/avx on btver1 CPUs

[patch] Import upstream fix to stop using xsave/avx on btver1 CPUs

fix-bug211864-1.diff (text/plain), 1.47 KB, created by Dimitry Andric on 2016-08-15 17:21:57 UTC

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Creator: Dimitry Andric

Created: 2016-08-15 17:21:57 UTC

Size: 1.47 KB

patch

obsolete

>Pull in r262772 from upstream clang trunk (by Simon Pilgrim):
>
>  [X86] AMD Bobcat CPU (btver1) doesn't support XSAVE 
>
>  btver1 is a SSSE3/SSE4a only CPU - it doesn't have AVX and doesn't support XSAVE.
>
>  Differential Revision: http://reviews.llvm.org/D17682
>
>Pull in r262782 from upstream llvm trunk (by Simon Pilgrim):
>
>  [X86] AMD Bobcat CPU (btver1) doesn't support XSAVE 
>
>  btver1 is a SSSE3/SSE4a only CPU - it doesn't have AVX and doesn't support XSAVE.
>
>  Differential Revision: http://reviews.llvm.org/D17683
>
>Index: contrib/llvm/lib/Target/X86/X86.td
>===================================================================
>--- contrib/llvm/lib/Target/X86/X86.td	(revision 304164)
>+++ contrib/llvm/lib/Target/X86/X86.td	(working copy)
>@@ -576,7 +576,6 @@ def : Proc<"btver1", [
>   FeaturePRFCHW,
>   FeatureLZCNT,
>   FeaturePOPCNT,
>-  FeatureXSAVE,
>   FeatureSlowSHLD,
>   FeatureLAHFSAHF
> ]>;
>Index: contrib/llvm/tools/clang/lib/Basic/Targets.cpp
>===================================================================
>--- contrib/llvm/tools/clang/lib/Basic/Targets.cpp	(revision 304164)
>+++ contrib/llvm/tools/clang/lib/Basic/Targets.cpp	(working copy)
>@@ -2731,7 +2731,6 @@ bool X86TargetInfo::initFeatureMap(
>     setFeatureEnabledImpl(Features, "prfchw", true);
>     setFeatureEnabledImpl(Features, "cx16", true);
>     setFeatureEnabledImpl(Features, "fxsr", true);
>-    setFeatureEnabledImpl(Features, "xsave", true);
>     break;
>   case CK_BDVER4:
>     setFeatureEnabledImpl(Features, "avx2", true);

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Attachments on bug 211864: 173705