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| author | Dominik Vogt <vogt@linux.vnet.ibm.com> | 2017-04-25 07:33:05 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2017-04-25 07:33:05 +0000 |
| commit | 97160c9b3b6e524efd7ee4e12dfcd82519d27246 (patch) | |
| tree | 8e8e359bdf96da3b59cf6daf054e70c0ab155c6f | |
| parent | 3ea685e75abb8e48098ba4b51e3fa6b5e120111f (diff) | |
| download | gcc-97160c9b3b6e524efd7ee4e12dfcd82519d27246.zip gcc-97160c9b3b6e524efd7ee4e12dfcd82519d27246.tar.gz gcc-97160c9b3b6e524efd7ee4e12dfcd82519d27246.tar.bz2 | |
S/390: Load and test peephole.
gcc/ChangeLog:
2017-04-25 Dominik Vogt <vogt@linux.vnet.ibm.com>
* config/s390/s390.md (define_peephole2): New peephole to help
combining the load-and-test pattern with volatile memory.
From-SVN: r247131
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/s390/s390.md | 15 |
2 files changed, 20 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2f2365b..7106442a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2017-04-25 Dominik Vogt <vogt@linux.vnet.ibm.com> + * config/s390/s390.md (define_peephole2): New peephole to help + combining the load-and-test pattern with volatile memory. + +2017-04-25 Dominik Vogt <vogt@linux.vnet.ibm.com> + * config/s390/s390.md ("cstorecc4"): Use load-on-condition and deal with CCZmode for TARGET_Z196. diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md index 6a1cab6..9baafcc 100644 --- a/gcc/config/s390/s390.md +++ b/gcc/config/s390/s390.md @@ -907,6 +907,21 @@ [(set_attr "op_type" "RR<E>,RXY") (set_attr "z10prop" "z10_fr_E1,z10_fwd_A3") ]) +; Peephole to combine a load-and-test from volatile memory which combine does +; not do. +(define_peephole2 + [(set (match_operand:GPR 0 "register_operand") + (match_operand:GPR 2 "memory_operand")) + (set (reg CC_REGNUM) + (compare (match_dup 0) (match_operand:GPR 1 "const0_operand")))] + "s390_match_ccmode(insn, CCSmode) && TARGET_EXTIMM + && GENERAL_REG_P (operands[0]) + && satisfies_constraint_T (operands[2])" + [(parallel + [(set (reg:CCS CC_REGNUM) + (compare:CCS (match_dup 2) (match_dup 1))) + (set (match_dup 0) (match_dup 2))])]) + ; ltr, lt, ltgr, ltg (define_insn "*tst<mode>_cconly_extimm" [(set (reg CC_REGNUM) |