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Use the cpuid 64 bit flag to pick the default CPU name for an unknown model.

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For the Family 6 switch in sys::getHostCPUName, an unrecognized model was
reported as "i686".  That's a really bad default since it means that new
CPUs will be treated as if they can only use 32-bit code.  This just looks
at the cpuid extended feature flag for 64 bit support, and if that is set,
it uses a default x86-64 cpu.  Similar logic is already used for the Family
15 code.  <rdar://problem/11314502>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156486 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2012-05-09 17:47:03 +00:00
parent 26bbdeed6c
commit 0d38d3a000
1 changed files with 1 additions and 1 deletions
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2
lib/Support/Host.cpp
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@ -239,7 +239,7 @@ std::string sys::getHostCPUName() {
case 39: // 32 nm Atom Medfield
return "atom";
default: return "i686";
default: return (Em64T) ? "x86-64" : "i686";
}
case 15: {
switch (Model) {