refs #206: also consider ASHIFTRT

bebbo · bebbo · commit 3f7d12d0f614 · 2023-08-28T15:27:31.000+02:00
diff --git a/gcc/bbb-opts.c b/gcc/bbb-opts.c
@@ -4797,7 +4797,7 @@ opt_elim_dead_assign (int blocked_regno)
       rtx_code opcode = GET_CODE(ssrc);
 
       // look for superfluous ZERO_EXTEND or SIGN_EXTEND
-      if (opcode == ASHIFT || opcode == LSHIFTRT)
+      if (opcode == ASHIFT || opcode == ASHIFTRT || opcode == LSHIFTRT)
 	{
 	  rtx op = XEXP(ssrc, 1);
 	  if (REG_P (op))

Original file line number	Diff line number	Diff line change
`@@ -4797,7 +4797,7 @@ opt_elim_dead_assign (int blocked_regno)`
`4797`	`4797`	`rtx_code opcode = GET_CODE(ssrc);`
`4798`	`4798`
`4799`	`4799`	`// look for superfluous ZERO_EXTEND or SIGN_EXTEND`
`4800`		`- if (opcode == ASHIFT \|\| opcode == LSHIFTRT)`
	`4800`	`+ if (opcode == ASHIFT \|\| opcode == ASHIFTRT \|\| opcode == LSHIFTRT)`
`4801`	`4801`	`{`
`4802`	`4802`	`rtx op = XEXP(ssrc, 1);`
`4803`	`4803`	`if (REG_P (op))`