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author | Ulrich Weigand <uweigand@de.ibm.com> | 2011-06-29 12:15:08 +0000 |
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committer | Ulrich Weigand <uweigand@gcc.gnu.org> | 2011-06-29 12:15:08 +0000 |
commit | f3678bfb504a9787fda6b560f15c6192a8597387 (patch) | |
tree | adb0058892895b52648b4cc0ff77c056f048b5ad /gcc/reload.c | |
parent | 433ba0a57b5be5a1292122405c0b928e1223c37d (diff) | |
download | gcc-f3678bfb504a9787fda6b560f15c6192a8597387.zip gcc-f3678bfb504a9787fda6b560f15c6192a8597387.tar.gz gcc-f3678bfb504a9787fda6b560f15c6192a8597387.tar.bz2 |
re PR rtl-optimization/49114 ([x32] Reload failed to handle (set reg:X (plus:X (subreg:X (reg:Y) 0) (const_int))))
PR rtl-optimization/49114
* reload.c (struct replacement): Remove SUBREG_LOC member.
(push_reload): Do not set it.
(push_replacement): Likewise.
(subst_reload): Remove dead code.
(copy_replacements): Remove assertion.
(copy_replacements_1): Do not handle SUBREG_LOC.
(move_replacements): Likewise.
(find_replacement): Remove dead code. Use reload_adjust_reg_for_mode.
Detect subregs via recursive descent instead of via SUBREG_LOC.
From-SVN: r175631
Diffstat (limited to 'gcc/reload.c')
-rw-r--r-- | gcc/reload.c | 106 |
1 files changed, 19 insertions, 87 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 3ad46b9..fa31454 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -158,8 +158,6 @@ static int replace_reloads; struct replacement { rtx *where; /* Location to store in */ - rtx *subreg_loc; /* Location of SUBREG if WHERE is inside - a SUBREG; 0 otherwise. */ int what; /* which reload this is for */ enum machine_mode mode; /* mode it must have */ }; @@ -1496,7 +1494,6 @@ push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc, { struct replacement *r = &replacements[n_replacements++]; r->what = i; - r->subreg_loc = in_subreg_loc; r->where = inloc; r->mode = inmode; } @@ -1505,7 +1502,6 @@ push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc, struct replacement *r = &replacements[n_replacements++]; r->what = i; r->where = outloc; - r->subreg_loc = out_subreg_loc; r->mode = outmode; } } @@ -1634,7 +1630,6 @@ push_replacement (rtx *loc, int reloadnum, enum machine_mode mode) struct replacement *r = &replacements[n_replacements++]; r->what = reloadnum; r->where = loc; - r->subreg_loc = 0; r->mode = mode; } } @@ -6287,33 +6282,7 @@ subst_reloads (rtx insn) if (GET_MODE (reloadreg) != r->mode && r->mode != VOIDmode) reloadreg = reload_adjust_reg_for_mode (reloadreg, r->mode); - /* If we are putting this into a SUBREG and RELOADREG is a - SUBREG, we would be making nested SUBREGs, so we have to fix - this up. Note that r->where == &SUBREG_REG (*r->subreg_loc). */ - - if (r->subreg_loc != 0 && GET_CODE (reloadreg) == SUBREG) - { - if (GET_MODE (*r->subreg_loc) - == GET_MODE (SUBREG_REG (reloadreg))) - *r->subreg_loc = SUBREG_REG (reloadreg); - else - { - int final_offset = - SUBREG_BYTE (*r->subreg_loc) + SUBREG_BYTE (reloadreg); - - /* When working with SUBREGs the rule is that the byte - offset must be a multiple of the SUBREG's mode. */ - final_offset = (final_offset / - GET_MODE_SIZE (GET_MODE (*r->subreg_loc))); - final_offset = (final_offset * - GET_MODE_SIZE (GET_MODE (*r->subreg_loc))); - - *r->where = SUBREG_REG (reloadreg); - SUBREG_BYTE (*r->subreg_loc) = final_offset; - } - } - else - *r->where = reloadreg; + *r->where = reloadreg; } /* If reload got no reg and isn't optional, something's wrong. */ else @@ -6327,10 +6296,6 @@ subst_reloads (rtx insn) void copy_replacements (rtx x, rtx y) { - /* We can't support X being a SUBREG because we might then need to know its - location if something inside it was replaced. */ - gcc_assert (GET_CODE (x) != SUBREG); - copy_replacements_1 (&x, &y, n_replacements); } @@ -6344,24 +6309,13 @@ copy_replacements_1 (rtx *px, rtx *py, int orig_replacements) const char *fmt; for (j = 0; j < orig_replacements; j++) - { - if (replacements[j].subreg_loc == px) - { - r = &replacements[n_replacements++]; - r->where = replacements[j].where; - r->subreg_loc = py; - r->what = replacements[j].what; - r->mode = replacements[j].mode; - } - else if (replacements[j].where == px) - { - r = &replacements[n_replacements++]; - r->where = py; - r->subreg_loc = 0; - r->what = replacements[j].what; - r->mode = replacements[j].mode; - } - } + if (replacements[j].where == px) + { + r = &replacements[n_replacements++]; + r->where = py; + r->what = replacements[j].what; + r->mode = replacements[j].mode; + } x = *px; y = *py; @@ -6387,13 +6341,8 @@ move_replacements (rtx *x, rtx *y) int i; for (i = 0; i < n_replacements; i++) - if (replacements[i].subreg_loc == x) - replacements[i].subreg_loc = y; - else if (replacements[i].where == x) - { - replacements[i].where = y; - replacements[i].subreg_loc = 0; - } + if (replacements[i].where == x) + replacements[i].where = y; } /* If LOC was scheduled to be replaced by something, return the replacement. @@ -6411,36 +6360,19 @@ find_replacement (rtx *loc) if (reloadreg && r->where == loc) { if (r->mode != VOIDmode && GET_MODE (reloadreg) != r->mode) - reloadreg = gen_rtx_REG (r->mode, REGNO (reloadreg)); + reloadreg = reload_adjust_reg_for_mode (reloadreg, r->mode); return reloadreg; } - else if (reloadreg && r->subreg_loc == loc) + else if (reloadreg && GET_CODE (*loc) == SUBREG + && r->where == &SUBREG_REG (*loc)) { - /* RELOADREG must be either a REG or a SUBREG. - - ??? Is it actually still ever a SUBREG? If so, why? */ - - if (REG_P (reloadreg)) - return gen_rtx_REG (GET_MODE (*loc), - (REGNO (reloadreg) + - subreg_regno_offset (REGNO (SUBREG_REG (*loc)), - GET_MODE (SUBREG_REG (*loc)), - SUBREG_BYTE (*loc), - GET_MODE (*loc)))); - else if (GET_MODE (reloadreg) == GET_MODE (*loc)) - return reloadreg; - else - { - int final_offset = SUBREG_BYTE (reloadreg) + SUBREG_BYTE (*loc); - - /* When working with SUBREGs the rule is that the byte - offset must be a multiple of the SUBREG's mode. */ - final_offset = (final_offset / GET_MODE_SIZE (GET_MODE (*loc))); - final_offset = (final_offset * GET_MODE_SIZE (GET_MODE (*loc))); - return gen_rtx_SUBREG (GET_MODE (*loc), SUBREG_REG (reloadreg), - final_offset); - } + if (r->mode != VOIDmode && GET_MODE (reloadreg) != r->mode) + reloadreg = reload_adjust_reg_for_mode (reloadreg, r->mode); + + return simplify_gen_subreg (GET_MODE (*loc), reloadreg, + GET_MODE (SUBREG_REG (*loc)), + SUBREG_BYTE (*loc)); } } |