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| author | Kazu Hirata <kazu@cs.umass.edu> | 2004-02-25 00:54:30 +0000 |
|---|---|---|
| committer | Kazu Hirata <kazu@gcc.gnu.org> | 2004-02-25 00:54:30 +0000 |
| commit | 2e802a6f2f5301c0245060cb49616e048a60b46f (patch) | |
| tree | fa096890523a25cd2e0753dd6b63f6254baae475 | |
| parent | c30316fb641074bcf5d567863fd5e9f3c70b0587 (diff) | |
| download | gcc-2e802a6f2f5301c0245060cb49616e048a60b46f.zip gcc-2e802a6f2f5301c0245060cb49616e048a60b46f.tar.gz gcc-2e802a6f2f5301c0245060cb49616e048a60b46f.tar.bz2 | |
cse.c (cse_change_cc_mode_insns): Stop at any instruction which modifies NEWREG.
* cse.c (cse_change_cc_mode_insns): Stop at any instruction
which modifies NEWREG.
(cse_condition_code_reg): Update the mode of CC_REG in
CC_SRC_INSN on our own.
From-SVN: r78413
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/cse.c | 22 |
2 files changed, 25 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6b9ac6e..bff9fd8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2004-02-24 Kazu Hirata <kazu@cs.umass.edu> + + * cse.c (cse_change_cc_mode_insns): Stop at any instruction + which modifies NEWREG. + (cse_condition_code_reg): Update the mode of CC_REG in + CC_SRC_INSN on our own. + 2004-02-24 Michael Matz <matz@suse.de> * config/i386/i386.c (ix86_comp_type_attributes): Check for @@ -7704,7 +7704,7 @@ cse_change_cc_mode (rtx *loc, void *data) /* Change the mode of any reference to the register REGNO (NEWREG) to GET_MODE (NEWREG), starting at START. Stop before END. Stop at - any instruction after START which modifies NEWREG. */ + any instruction which modifies NEWREG. */ static void cse_change_cc_mode_insns (rtx start, rtx end, rtx newreg) @@ -7716,7 +7716,7 @@ cse_change_cc_mode_insns (rtx start, rtx end, rtx newreg) if (! INSN_P (insn)) continue; - if (insn != start && reg_set_p (newreg, insn)) + if (reg_set_p (newreg, insn)) return; for_each_rtx (&PATTERN (insn), cse_change_cc_mode, newreg); @@ -8008,8 +8008,22 @@ cse_condition_code_reg (void) if (mode != GET_MODE (cc_src)) abort (); if (mode != orig_mode) - cse_change_cc_mode_insns (cc_src_insn, NEXT_INSN (last_insn), - gen_rtx_REG (mode, REGNO (cc_reg))); + { + rtx newreg = gen_rtx_REG (mode, REGNO (cc_reg)); + + /* Change the mode of CC_REG in CC_SRC_INSN to + GET_MODE (NEWREG). */ + for_each_rtx (&PATTERN (cc_src_insn), cse_change_cc_mode, + newreg); + for_each_rtx (®_NOTES (cc_src_insn), cse_change_cc_mode, + newreg); + + /* Do the same in the following insns that use the + current value of CC_REG within BB. */ + cse_change_cc_mode_insns (NEXT_INSN (cc_src_insn), + NEXT_INSN (last_insn), + newreg); + } } } } |