Disallow z0-z15 in Arm64EC inline assembly

Author: taiki-e

compiler/rustc_codegen_gcc/src/asm.rs

@@ -611,10 +611,14 @@ fn reg_to_gcc(reg: InlineAsmRegOrRegClass) -> ConstraintOrRegister {
         }
         // They can be retrieved from https://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html
         InlineAsmRegOrRegClass::RegClass(reg) => match reg {
-            InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg) => "r",
-            InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg) => "w",
-            InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16) => "x",
-            InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg) => {
+            InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg)
+            | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::reg) => "r",
+            InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg)
+            | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::vreg) => "w",
+            InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16)
+            | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::vreg_low16) => "x",
+            InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg)
+            | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::preg) => {
                 unreachable!("clobber-only")
             }
             InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg) => "r",
@@ -698,12 +702,16 @@ fn reg_to_gcc(reg: InlineAsmRegOrRegClass) -> ConstraintOrRegister {
 /// the type is, as long as it is valid for the constraint code.
 fn dummy_output_type<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, reg: InlineAsmRegClass) -> Type<'gcc> {
     match reg {
-        InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg) => cx.type_i32(),
+        InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg)
+        | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::reg) => cx.type_i32(),
         InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg)
-        | InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16) => {
+        | InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16)
+        | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::vreg)
+        | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::vreg_low16) => {
             cx.type_vector(cx.type_i64(), 2)
         }
-        InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg) => {
+        InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg)
+        | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::preg) => {
             unreachable!("clobber-only")
         }
         InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg) => cx.type_i32(),
@@ -863,12 +871,16 @@ fn modifier_to_gcc(
     // The modifiers can be retrieved from
     // https://gcc.gnu.org/onlinedocs/gcc/Modifiers.html#Modifiers
     match reg {
-        InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg) => modifier,
+        InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg)
+        | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::reg) => modifier,
         InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg)
-        | InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16) => {
+        | InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16)
+        | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::vreg)
+        | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::vreg_low16) => {
             if modifier == Some('v') { None } else { modifier }
         }
-        InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg) => {
+        InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg)
+        | InlineAsmRegClass::Arm64EC(AArch64InlineAsmRegClass::preg) => {
             unreachable!("clobber-only")
         }
         InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg) => None,