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| author | Richard Earnshaw <rearnsha@arm.com> | 2019-10-18 19:02:12 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2019-10-18 19:02:12 +0000 |
| commit | 494c4921c7c7970562ab3ee3838809e8e7f0623a (patch) | |
| tree | af3dd36ee4b7c0d91e7b8cf7f0d499b29954255e | |
| parent | 717e1281604655ef608931fff028f02d462e78b6 (diff) | |
| download | gcc-494c4921c7c7970562ab3ee3838809e8e7f0623a.zip gcc-494c4921c7c7970562ab3ee3838809e8e7f0623a.tar.gz gcc-494c4921c7c7970562ab3ee3838809e8e7f0623a.tar.bz2 | |
[arm] fix constraints on addsi3_carryin_alt2
addsi3_carryin_alt2 has a more strict constraint than the predicate
when adding a constant. This leads to sub-optimal code in some
circumstances.
* config/arm/arm.md (addsi3_carryin_alt2): Use arm_not_operand for
operand 2.
From-SVN: r277168
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/arm/arm.md | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index cb2abfe..1c96b17 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2019-10-18 Richard Earnshaw <rearnsha@arm.com> + * config/arm/arm.md (addsi3_carryin_alt2): Use arm_not_operand for + operand 2. + +2019-10-18 Richard Earnshaw <rearnsha@arm.com> + * config/arm/arm.md (addsi3_carryin_shift_<optab>): Reorder operands to match canonical form. diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md index 9754a76..fbe154a 100644 --- a/gcc/config/arm/arm.md +++ b/gcc/config/arm/arm.md @@ -893,7 +893,7 @@ [(set (match_operand:SI 0 "s_register_operand" "=l,r,r") (plus:SI (plus:SI (LTUGEU:SI (reg:<cnb> CC_REGNUM) (const_int 0)) (match_operand:SI 1 "s_register_operand" "%l,r,r")) - (match_operand:SI 2 "arm_rhs_operand" "l,rI,K")))] + (match_operand:SI 2 "arm_not_operand" "l,rI,K")))] "TARGET_32BIT" "@ adc%?\\t%0, %1, %2 |