[llvm] [RISCV][ISEL] Lowering to load-acquire/store-release for RISCV Zalasr (PR #82914)

[Craig Topper via llvm-commits]

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@@ -21926,6 +21926,35 @@ unsigned RISCVTargetLowering::getCustomCtpopCost(EVT VT,
   return isCtpopFast(VT) ? 0 : 1;
 }
 
+bool RISCVTargetLowering::shouldInsertFencesForAtomic(
+    const Instruction *I) const {
+  if (Subtarget.hasStdExtZalasr()) {
+    if (Subtarget.hasStdExtZtso()) {
+      // Zalasr + TSO means that atomic_load_acquire and atomic_store_release
+      //  should be lowered to plain load/store. The easiest way to do this is
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topperc wrote:

Only one space after `//`

https://github.com/llvm/llvm-project/pull/82914