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* [gcc r12-1810] Use right shifts to eliminate redundant test/compare insns on the H8
@ 2021-06-25 13:24 Jeff Law
0 siblings, 0 replies; only message in thread
From: Jeff Law @ 2021-06-25 13:24 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:3a50aed09edc5e69080a0e49851acdb874227256
commit r12-1810-g3a50aed09edc5e69080a0e49851acdb874227256
Author: Jeff Law <jeffreyalaw@gmail.com>
Date: Fri Jun 25 09:22:28 2021 -0400
Use right shifts to eliminate redundant test/compare insns on the H8
gcc/
* config/h8300/h8300.c (select_cc_mode): Handle ASHIFTRT and LSHIFTRT.
Diff:
---
gcc/config/h8300/h8300.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/gcc/config/h8300/h8300.c b/gcc/config/h8300/h8300.c
index 511c2b28e40..d8b4bfcbdbe 100644
--- a/gcc/config/h8300/h8300.c
+++ b/gcc/config/h8300/h8300.c
@@ -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)))
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2021-06-25 13:24 [gcc r12-1810] Use right shifts to eliminate redundant test/compare insns on the H8 Jeff Law
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