[clang] [llvm] [X86] Support EGPR for inline assembly. (PR #92338)

[Shengchen Kan via cfe-commits]

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@@ -57581,6 +57581,14 @@ X86TargetLowering::getConstraintType(StringRef Constraint) const {
       case '2':
         return C_RegisterClass;
       }
+    case 'j':
+      switch (Constraint[1]) {
+      default:
+        break;
+      case 'r':
+      case 'R':
+        return C_RegisterClass;
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KanRobert wrote:

What's this used for? I can't find `r` in the switch-cases before this PR.

https://github.com/llvm/llvm-project/pull/92338