ISLE: Resolve overlap in the riscv64 backend (#4982)

Resolve overlap in the RiscV64 backend by adding priorities to rules. Additionally, one test updated as a result of this work, as a peephole optimization for addition with immediates fires now.
2022-09-29 17:22:25 -07:00
parent 77ab99d3b0
commit c1d6ca48a7
3 changed files with 254 additions and 253 deletions
--- a/cranelift/filetests/filetests/isa/riscv64/arithmetic.clif
+++ b/cranelift/filetests/filetests/isa/riscv64/arithmetic.clif
@@ -329,8 +329,7 @@ block0(v0: i32):
 }

 ; block0:
-;   li a1,-1
-;   addw a0,a0,a1
+;   addiw a0,a0,-1
 ;   ret

 function %f27(i32) -> i32 {