[clang] [llvm] [RISCV][LLVM] Enable atomics for 'Zalrsc' (PR #163672)

[Craig Topper via llvm-commits]

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@@ -308,7 +308,65 @@ class PseudoMaskedAMOMinMaxPat<Intrinsic intrin, Pseudo AMOInst>
           (AMOInst GPR:$addr, GPR:$incr, GPR:$mask, GPR:$shiftamt,
            timm:$ordering)>;
 
-let Predicates = [HasStdExtA] in {
+let Predicates = [HasStdExtZalrsc, NoStdExtZaamo] in {
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topperc wrote:

There is a comment around line 161 above where `HasAtomicLdSt` is used that says `Atomic load/store are available under both +a and +force-atomics.`. This comment needs to be updated to +zalrsc

https://github.com/llvm/llvm-project/pull/163672