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Diffstat (limited to 'gcc/config/arm/arm.c')
| -rw-r--r-- | gcc/config/arm/arm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 83c5b85..bcf1904 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -6100,6 +6100,13 @@ arm_select_cc_mode (enum rtx_code op, rtx x, rtx y) || GET_CODE (x) == ROTATERT)) return CC_SWPmode; + /* This operation is performed swapped, but since we only rely on the Z + flag we don't need an additional mode. */ + if (GET_MODE (y) == SImode && REG_P (y) + && GET_CODE (x) == NEG + && (op == EQ || op == NE)) + return CC_Zmode; + /* This is a special case that is used by combine to allow a comparison of a shifted byte load to be split into a zero-extend followed by a comparison of the shifted integer (only valid for |