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| author | Andreas Krebbel <Andreas.Krebbel@de.ibm.com> | 2014-04-11 10:42:27 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2014-04-11 10:42:27 +0000 |
| commit | 3c91f126f470758738a0cddbec8f978f42486754 (patch) | |
| tree | 5252b1c1b1eb89237d703ff6aa43e8d452f14ad2 /gcc | |
| parent | 8f0ad2e592685fd41693f43acb58c4f503ecb2d1 (diff) | |
| download | gcc-3c91f126f470758738a0cddbec8f978f42486754.zip gcc-3c91f126f470758738a0cddbec8f978f42486754.tar.gz gcc-3c91f126f470758738a0cddbec8f978f42486754.tar.bz2 | |
s390.md: Add a splitter for NOT rtx.
2014-04-11 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* config/s390/s390.md: Add a splitter for NOT rtx.
From-SVN: r209295
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/s390/s390.md | 15 |
2 files changed, 19 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d702fae..b4173bc 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2014-04-11 Andreas Krebbel <Andreas.Krebbel@de.ibm.com> + + * config/s390/s390.md: Add a splitter for NOT rtx. + 2014-04-11 Jakub Jelinek <jakub@redhat.com> PR rtl-optimization/60663 diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md index 7d9d1ad..b17c1fa 100644 --- a/gcc/config/s390/s390.md +++ b/gcc/config/s390/s390.md @@ -7001,6 +7001,21 @@ "" "s390_expand_logical_operator (XOR, <MODE>mode, operands); DONE;") +; Combine replaces (xor (x) (const_int -1)) with (not (x)) when doing +; simplifications. So its better to have something matching. +(define_split + [(set (match_operand:INT 0 "nonimmediate_operand" "") + (not:INT (match_operand:INT 1 "nonimmediate_operand" "")))] + "" + [(parallel + [(set (match_dup 0) (xor:INT (match_dup 1) (match_dup 2))) + (clobber (reg:CC CC_REGNUM))])] +{ + operands[2] = constm1_rtx; + if (!s390_logical_operator_ok_p (operands)) + FAIL; +}) + ; ; xordi3 instruction pattern(s). ; |