[llvm] [RISCV][GlobalISel] Lower G_ATOMICRMW_SUB via G_ATOMICRMW_ADD (PR #155972)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,930 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=riscv32 -mattr=+a,+zabha -global-isel -verify-machineinstrs < %s | FileCheck %s --check-prefixes=RV32IA-ZABHA
+; RUN: llc -mtriple=riscv32 -mattr=+a -global-isel -verify-machineinstrs < %s | FileCheck %s --check-prefixes=RV32IA
+; RUN: llc -mtriple=riscv32 -global-isel -verify-machineinstrs < %s | FileCheck %s --check-prefixes=RV32I
+; RUN: llc -mtriple=riscv64 -mattr=+a,+zabha -global-isel -verify-machineinstrs < %s | FileCheck %s --check-prefixes=RV64IA-ZABHA
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arsenm wrote:

Don't need -verify-machineinstrs. Also can you move the -global-isel arguments to the front 

https://github.com/llvm/llvm-project/pull/155972