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| author | segher <segher@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-12-01 22:37:34 +0000 |
|---|---|---|
| committer | segher <segher@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-12-01 22:37:34 +0000 |
| commit | d2fcadb2503af7b4ce326d1b395f52a55145d040 (patch) | |
| tree | c299c1a2e197ee72eb8dccea66a72117a75aa238 /gcc/combine.c | |
| parent | 518a433d6ff659b766ce4f52cb5edb15a72123ed (diff) | |
| download | gcc-d2fcadb2503af7b4ce326d1b395f52a55145d040.tar.gz | |
* combine.c (try_combine): Use is_parallel_of_n_reg_sets some more.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@218249 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 42 |
1 files changed, 16 insertions, 26 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index b9319023c34..f471920b23e 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2832,43 +2832,33 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0, This undoes a previous combination and allows us to match a branch-and- decrement insn. */ - if (i1 == 0 && GET_CODE (PATTERN (i2)) == PARALLEL - && XVECLEN (PATTERN (i2), 0) >= 2 - && GET_CODE (XVECEXP (PATTERN (i2), 0, 0)) == SET + if (i1 == 0 + && is_parallel_of_n_reg_sets (i2, 2) && (GET_MODE_CLASS (GET_MODE (SET_DEST (XVECEXP (PATTERN (i2), 0, 0)))) == MODE_CC) && GET_CODE (SET_SRC (XVECEXP (PATTERN (i2), 0, 0))) == COMPARE && XEXP (SET_SRC (XVECEXP (PATTERN (i2), 0, 0)), 1) == const0_rtx - && GET_CODE (XVECEXP (PATTERN (i2), 0, 1)) == SET - && REG_P (SET_DEST (XVECEXP (PATTERN (i2), 0, 1))) && rtx_equal_p (XEXP (SET_SRC (XVECEXP (PATTERN (i2), 0, 0)), 0), SET_SRC (XVECEXP (PATTERN (i2), 0, 1))) && !reg_used_between_p (SET_DEST (XVECEXP (PATTERN (i2), 0, 0)), i2, i3) && !reg_used_between_p (SET_DEST (XVECEXP (PATTERN (i2), 0, 1)), i2, i3)) { - for (i = XVECLEN (PATTERN (i2), 0) - 1; i >= 2; i--) - if (GET_CODE (XVECEXP (PATTERN (i2), 0, i)) != CLOBBER) - break; - - if (i == 1) - { - /* We make I1 with the same INSN_UID as I2. This gives it - the same DF_INSN_LUID for value tracking. Our fake I1 will - never appear in the insn stream so giving it the same INSN_UID - as I2 will not cause a problem. */ + /* We make I1 with the same INSN_UID as I2. This gives it + the same DF_INSN_LUID for value tracking. Our fake I1 will + never appear in the insn stream so giving it the same INSN_UID + as I2 will not cause a problem. */ - i1 = gen_rtx_INSN (VOIDmode, NULL, i2, BLOCK_FOR_INSN (i2), - XVECEXP (PATTERN (i2), 0, 1), INSN_LOCATION (i2), - -1, NULL_RTX); - INSN_UID (i1) = INSN_UID (i2); + i1 = gen_rtx_INSN (VOIDmode, NULL, i2, BLOCK_FOR_INSN (i2), + XVECEXP (PATTERN (i2), 0, 1), INSN_LOCATION (i2), + -1, NULL_RTX); + INSN_UID (i1) = INSN_UID (i2); - SUBST (PATTERN (i2), XVECEXP (PATTERN (i2), 0, 0)); - SUBST (XEXP (SET_SRC (PATTERN (i2)), 0), - SET_DEST (PATTERN (i1))); - unsigned int regno = REGNO (SET_DEST (PATTERN (i1))); - SUBST_LINK (LOG_LINKS (i2), - alloc_insn_link (i1, regno, LOG_LINKS (i2))); - } + SUBST (PATTERN (i2), XVECEXP (PATTERN (i2), 0, 0)); + SUBST (XEXP (SET_SRC (PATTERN (i2)), 0), + SET_DEST (PATTERN (i1))); + unsigned int regno = REGNO (SET_DEST (PATTERN (i1))); + SUBST_LINK (LOG_LINKS (i2), + alloc_insn_link (i1, regno, LOG_LINKS (i2))); } /* If I2 is a PARALLEL of two SETs of REGs (and perhaps some CLOBBERs), |