[PATCH] D153326: [CSKY] Optimize subtraction with SUBI32/SUBI16

[Ben Shi via Phabricator via llvm-commits]

benshi001 added inline comments.


================
Comment at: llvm/test/CodeGen/CSKY/base-i.ll:44
+define i32 @addRI_256(i32 %x) {
+; CHECK-LABEL: addRI_256:
+; CHECK:       # %bb.0: # %entry
----------------
256 is the upper boundary of `ADDI16`.


================
Comment at: llvm/test/CodeGen/CSKY/base-i.ll:292
+define i32 @subRI_256(i32 %x) {
+; CHECK-LABEL: subRI_256:
+; CHECK:       # %bb.0: # %entry
----------------
256 is the upper boundary of `SUBI16`.


================
Comment at: llvm/test/CodeGen/CSKY/base-i.ll:349
 ; CHECK:       # %bb.0: # %entry
 ; CHECK-NEXT:    movih32 a1, 65535
 ; CHECK-NEXT:    ori32 a1, a1, 61439
----------------
4097 is not optimized to `SUBI32` due to out of range.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D153326/new/

https://reviews.llvm.org/D153326