[llvm-branch-commits] [llvm] [AArch64][llvm] Some instructions should be `HINT` aliases (NFC) (PR #189926)

[via llvm-branch-commits]

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@@ -1552,21 +1552,24 @@ let hasSideEffects = 1, isCodeGenOnly = 1, isTerminator = 1, isBarrier = 1 in {
 //===----------------------------------------------------------------------===//
 
 def HINT : HintI<"hint">;
-def : InstAlias<"yield",(HINT 0b001)>;
-def : InstAlias<"wfe",  (HINT 0b010)>;
-def : InstAlias<"wfi",  (HINT 0b011)>;
-def : InstAlias<"sev",  (HINT 0b100)>;
-def : InstAlias<"sevl", (HINT 0b101)>;
-def : InstAlias<"dgh",  (HINT 0b110)>;
-def : InstAlias<"esb",  (HINT 0b10000)>, Requires<[HasRAS]>;
+def : InstAlias<"yield",(HINT 1)>;
+def : InstAlias<"wfe",  (HINT 2)>;
+def : InstAlias<"wfi",  (HINT 3)>;
+def : InstAlias<"sev",  (HINT 4)>;
+def : InstAlias<"sevl", (HINT 5)>;
+def : InstAlias<"dgh",  (HINT 6)>;
+def : InstAlias<"esb",  (HINT 16)>, Requires<[HasRAS]>;
 def : InstAlias<"csdb", (HINT 20)>;
 
 let CRm = 0b0000, hasSideEffects = 0 in
 def NOP : SystemNoOperands<0b000, "hint\t#0">;
 
 def : InstAlias<"nop", (NOP)>;
 
-def STSHH: STSHHI;
+def : InstAlias<"stshh $policy", (HINT pcdphint_op:$policy)>;
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CarolineConcatto wrote:

I was talking with @Lukacma  and maybe a better options would be to not create pcdphint_op,  shuhint_op and tsbhint_op and maybe create alias, like we have for the sys instructions

https://github.com/llvm/llvm-project/pull/189926