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Use right shifts to eliminate redundant test/compare insns on the H8 

gcc/
	* config/h8300/h8300.c (select_cc_mode): Handle ASHIFTRT and LSHIFTRT.
This commit is contained in:
Jeff Law 2021-06-25 09:22:28 -04:00
parent 55a1546b73
commit 3a50aed09e
1 changed files with 4 additions and 3 deletions
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7
gcc/config/h8300/h8300.c
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@ -1947,9 +1947,10 @@ h8300_select_cc_mode (enum rtx_code cond, rtx op0, rtx op1)
if (op1 == const0_rtx
&& (cond == EQ || cond == NE || cond == LT || cond == GE)
&& (GET_CODE (op0) == PLUS || GET_CODE (op0) == MINUS
|| GET_CODE (op0) == NEG || GET_CODE (op0) == AND
|| GET_CODE (op0) == IOR || GET_CODE (op0) == XOR
|| GET_CODE (op0) == NOT || GET_CODE (op0) == ASHIFT
|| GET_CODE (op0) == NEG || GET_CODE (op0) == AND
|| GET_CODE (op0) == IOR || GET_CODE (op0) == XOR
|| GET_CODE (op0) == NOT || GET_CODE (op0) == ASHIFT
|| GET_CODE (op0) == ASHIFTRT || GET_CODE (op0) == LSHIFTRT
|| GET_CODE (op0) == MULT || GET_CODE (op0) == SYMBOL_REF
|| GET_CODE (op0) == SIGN_EXTEND || GET_CODE (op0) == ZERO_EXTEND
|| REG_P (op0) || MEM_P (op0)))