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| author | m.hayes <m.hayes@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-04-20 23:18:44 +0000 |
|---|---|---|
| committer | m.hayes <m.hayes@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-04-20 23:18:44 +0000 |
| commit | 845c2c00ddfddb4a175002739a554b1e5396414e (patch) | |
| tree | 192ff04b90e438ebd750db43b8f416a6b9b064fa /gcc/config | |
| parent | e70d38cdf457b2e97ff54c9c1121455b663c81f9 (diff) | |
| download | gcc-845c2c00ddfddb4a175002739a554b1e5396414e.tar.gz | |
* config/c4x/c4x.md: Add new peepholes to remove redundant loads.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@26571 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/c4x/c4x.md | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/config/c4x/c4x.md b/gcc/config/c4x/c4x.md index fc567f20e85..0769556ced8 100644 --- a/gcc/config/c4x/c4x.md +++ b/gcc/config/c4x/c4x.md @@ -7101,3 +7101,26 @@ "(REGNO (operands[0]) != REGNO (operands[4]))" "xor3\\t%2,%1,%0\\n||\\tsti\\t%4,%3") +; The following two peepholes remove an unecessary load +; often found at the end of a function. These peepholes +; could be generalised to other binary operators. They shouldn't +; be required if we run a post reload mop-up pass. +(define_peephole + [(parallel [(set (match_operand:QF 0 "ext_reg_operand" "") + (plus:QF (match_operand:QF 1 "ext_reg_operand" "") + (match_operand:QF 2 "ext_reg_operand" ""))) + (clobber (reg:CC_NOOV 21))]) + (set (match_operand:QF 3 "ext_reg_operand" "") + (match_dup 0))] + "dead_or_set_p (insn, operands[0])" + "addf3\\t%2,%1,%3") + +(define_peephole + [(parallel [(set (match_operand:QI 0 "reg_operand" "") + (plus:QI (match_operand:QI 1 "reg_operand" "") + (match_operand:QI 2 "reg_operand" ""))) + (clobber (reg:CC_NOOV 21))]) + (set (match_operand:QI 3 "reg_operand" "") + (match_dup 0))] + "dead_or_set_p (insn, operands[0])" + "addi3\\t%2,%1,%3") |