Fix exegesis build on aarch64-windows-msvc host

[maxim-kuvyrkov]

Summary

Include x86 intrinsics only when compiling for x86_64
or i386. _MSC_VER no longer implies x86.

[maxim-kuvyrkov]

@tstellar

Hi Tom,

OK to backport to release/12.x branch once this is merged to master? This will unblock RC builds for aarch64-windows-msvc (Windows on Arm).

[tstellar]

In D96498#2556731, @maxim-kuvyrkov wrote:

@tstellar

Hi Tom,

OK to backport to release/12.x branch once this is merged to master? This will unblock RC builds for aarch64-windows-msvc (Windows on Arm).

Can you file a bug for this?

[maxim-kuvyrkov]

In D96498#2556784, @tstellar wrote:

...

Can you file a bug for this?

Filed https://bugs.llvm.org/show_bug.cgi?id=49149 .

[dmajor]

llvm/tools/llvm-exegesis/lib/X86/Target.cpp

29

Is it supported to compile this with real MSVC? I don't think this would evaluate to true there. I believe the MSVC-ism for this is defined(_M_IX86) || defined(_M_X64)

[gchatelet]

llvm/tools/llvm-exegesis/lib/X86/Target.cpp

29

I believe the MSVC-ism for this is defined(_M_IX86) || defined(_M_X64)

Yes indeed
https://sourceforge.net/p/predef/wiki/Architectures/

[maxim-kuvyrkov]

Updated patch to use canonical MSVC syntax

[maxim-kuvyrkov]

Thanks for the reviews

[maxim-kuvyrkov]

@tstellar
OK to cherry-pick to release/12.x after a couple of days?

llvm/tools/llvm-exegesis/lib/X86/Target.cpp

 #include "llvm/MC/MCInstBuilder.h"
 #include "llvm/Support/Errc.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/FormatVariadic.h"
 
 #include <memory>
 #include <string>
 #include <vector>
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
 #include <immintrin.h>
 #include <intrin.h>
 #endif
 
 namespace llvm {
 namespace exegesis {
 
 static cl::OptionCategory