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

[Wang Pengcheng via llvm-commits]

================
@@ -5,13 +5,20 @@
 ; RUN:   | FileCheck -check-prefixes=RV32IA,RV32IA-WMO %s
 ; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-ztso -verify-machineinstrs < %s \
 ; RUN:   | FileCheck -check-prefixes=RV32IA,RV32IA-TSO %s
+; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-zalasr -verify-machineinstrs < %s \
+; RUN:   | FileCheck -check-prefixes=RV32IA,RV32IA-ZALASR,RV32IA-ZALASR-WMO %s
+; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-zalasr,+experimental-ztso -verify-machineinstrs < %s \
+; RUN:   | FileCheck -check-prefixes=RV32IA,RV32IA-ZALASR,RV32IA-ZALASR-TSO %s
----------------
wangpc-pp wrote:

Thanks for clasifying! I think we can reduce some CHECKs line via adding `RV32IA-TSO` (and also for RV64)  to `-check-prefixes`.
```shell
; RUN: llc -mtriple=riscv32 -mattr=+a,+experimental-zalasr,+experimental-ztso -verify-machineinstrs < %s \
; RUN:   | FileCheck -check-prefixes=RV32IA,RV32IA-ZALASR,RV32IA-TSO,RV32IA-ZALASR-TSO %s
```

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