[clang] [X86][CFE] Support EGPR in inline assembly. (PR #91323)

[Phoebe Wang via cfe-commits]

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@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -o /dev/null
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -target-feature +egpr %s -o /dev/null
+
+int foo(void) {
+  register int a __asm__("ebx");
+#ifdef __EGPR__
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phoebewang wrote:

Why just use `#ifdef __arm__` to distinguish ARM from X86?

https://github.com/llvm/llvm-project/pull/91323