[clang] [llvm] [RISCV] Implement the implications of C extension (PR #132259)

[Kito Cheng via llvm-commits]

================
@@ -25,8 +25,8 @@ addi a0, a1, 0
 # CHECK: # encoding:  [0xe0,0x1f]
 addi s0, sp, 1020
 
-# CHECK: .option arch, -c
-.option arch, -c
+# CHECK: .option arch, -c, -zca
+.option arch, -c, -zca
----------------
kito-cheng wrote:

I guess `.opt arch, -zca` won't work because C will implied `zca` back again?

https://github.com/llvm/llvm-project/pull/132259