[llvm] [RISCV] Exploit sh3add/sh2add for stack offsets by shifted 12-bit constants (PR #87950)

[Craig Topper via llvm-commits]

================
@@ -239,6 +239,32 @@ void RISCVRegisterInfo::adjustReg(MachineBasicBlock &MBB,
     return;
   }
 
+  // Use shNadd if doing so lets us materialize a 12 bit immediate with a single
+  // instruction.  This saves 1 instruction over the full lui/addi+add fallback
+  // path.  We avoid anything which can be done with a single lui as it night
----------------
topperc wrote:

night -> might

https://github.com/llvm/llvm-project/pull/87950