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| author | Bernd Schmidt <bernds@codesourcery.com> | 2012-08-09 13:18:05 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2012-08-09 13:18:05 +0000 |
| commit | 82ad0aaf6e6d671b8dab3fd9ae3b496f1c70aea7 (patch) | |
| tree | dc0e08837a77bf368d263bcde301c676189919de /gcc/reload1.c | |
| parent | 62d6a5bbc851e99b69cf6899e02ac46e66a3b50c (diff) | |
| download | gcc-82ad0aaf6e6d671b8dab3fd9ae3b496f1c70aea7.zip gcc-82ad0aaf6e6d671b8dab3fd9ae3b496f1c70aea7.tar.gz gcc-82ad0aaf6e6d671b8dab3fd9ae3b496f1c70aea7.tar.bz2 | |
reload.c (find_valid_class_1): New static function.
* reload.c (find_valid_class_1): New static function.
(push_reload): Use it when reloading a SYMBOL_REG as the inner
of a subreg. Keep better track of needed classes for the
secondary memory case.
* config/i386/i386.h (LIMIT_RELOAD_CLASS): Limit INT_SSE_REGS to
GENERAL_REGS.
* reload1.c (replaced_subreg): New static function.
(gen_reload): Use it when deciding whether to use secondary
memory.
* gcc.c-torture/compile/20120727-1.c: New test.
From-SVN: r190252
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index e6d3a71..bf5d3d3 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -8469,6 +8469,18 @@ emit_insn_if_valid_for_reload (rtx insn) return NULL; } +/* If X is not a subreg, return it unmodified. If it is a subreg, + look up whether we made a replacement for the SUBREG_REG. Return + either the replacement or the SUBREG_REG. */ + +static rtx +replaced_subreg (rtx x) +{ + if (GET_CODE (x) == SUBREG) + return find_replacement (&SUBREG_REG (x)); + return x; +} + /* Emit code to perform a reload from IN (which may be a reload register) to OUT (which may also be a reload register). IN or OUT is from operand OPNUM with reload type TYPE. @@ -8479,7 +8491,7 @@ static rtx gen_reload (rtx out, rtx in, int opnum, enum reload_type type) { rtx last = get_last_insn (); - rtx tem; + rtx tem, tem1, tem2; /* If IN is a paradoxical SUBREG, remove it and try to put the opposite SUBREG on OUT. Likewise for a paradoxical SUBREG on OUT. */ @@ -8616,14 +8628,12 @@ gen_reload (rtx out, rtx in, int opnum, enum reload_type type) #ifdef SECONDARY_MEMORY_NEEDED /* If we need a memory location to do the move, do it that way. */ - else if ((REG_P (in) - || (GET_CODE (in) == SUBREG && REG_P (SUBREG_REG (in)))) - && reg_or_subregno (in) < FIRST_PSEUDO_REGISTER - && (REG_P (out) - || (GET_CODE (out) == SUBREG && REG_P (SUBREG_REG (out)))) - && reg_or_subregno (out) < FIRST_PSEUDO_REGISTER - && SECONDARY_MEMORY_NEEDED (REGNO_REG_CLASS (reg_or_subregno (in)), - REGNO_REG_CLASS (reg_or_subregno (out)), + else if ((tem1 = replaced_subreg (in), tem2 = replaced_subreg (out), + (REG_P (tem1) && REG_P (tem2))) + && REGNO (tem1) < FIRST_PSEUDO_REGISTER + && REGNO (tem2) < FIRST_PSEUDO_REGISTER + && SECONDARY_MEMORY_NEEDED (REGNO_REG_CLASS (REGNO (tem1)), + REGNO_REG_CLASS (REGNO (tem2)), GET_MODE (out))) { /* Get the memory to use and rewrite both registers to its mode. */ |