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| author | Richard Earnshaw <rearnsha@arm.com> | 2004-01-14 16:25:09 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2004-01-14 16:25:09 +0000 |
| commit | 684bcee5367498b836f33acc8acee494dadaf115 (patch) | |
| tree | cfe0e511c5773b158e11452df022ec23938aee59 /gcc | |
| parent | e7844ffbe7f9312fd83d1f5f62b5d22fde785c6c (diff) | |
| download | gcc-684bcee5367498b836f33acc8acee494dadaf115.zip gcc-684bcee5367498b836f33acc8acee494dadaf115.tar.gz gcc-684bcee5367498b836f33acc8acee494dadaf115.tar.bz2 | |
regrename.c (find_oldest_value_reg): If the replacement uses multiple hard registers...
* regrename.c (find_oldest_value_reg): If the replacement uses
multiple hard registers, check that all of them are in CLASS.
From-SVN: r75867
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/regrename.c | 22 |
2 files changed, 18 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 060d3f8..63bebc5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2004-01-14 Richard Earnshaw <rearnsha@arm.com> + + * regrename.c (find_oldest_value_reg): If the replacement uses + multiple hard registers, check that all of them are in CLASS. + 2004-01-14 Jan Hubicka <jh@suse.cz> * alias.c (get_alias_set): Initialize alias set to 0 when subset is diff --git a/gcc/regrename.c b/gcc/regrename.c index 56f6a88..871507b 100644 --- a/gcc/regrename.c +++ b/gcc/regrename.c @@ -1,5 +1,5 @@ /* Register renaming for the GNU compiler. - Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc. + Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of GCC. @@ -1339,15 +1339,19 @@ find_oldest_value_reg (enum reg_class class, rtx reg, struct value_data *vd) { enum machine_mode oldmode = vd->e[i].mode; rtx new; + unsigned int last; - if (TEST_HARD_REG_BIT (reg_class_contents[class], i) - && (new = maybe_mode_change (oldmode, vd->e[regno].mode, mode, i, - regno))) - { - ORIGINAL_REGNO (new) = ORIGINAL_REGNO (reg); - REG_ATTRS (new) = REG_ATTRS (reg); - return new; - } + for (last = i; last < i + HARD_REGNO_NREGS (i, mode); last++) + if (!TEST_HARD_REG_BIT (reg_class_contents[class], last)) + return NULL_RTX; + + if (new = maybe_mode_change (oldmode, vd->e[regno].mode, mode, i, + regno)) + { + ORIGINAL_REGNO (new) = ORIGINAL_REGNO (reg); + REG_ATTRS (new) = REG_ATTRS (reg); + return new; + } } return NULL_RTX; |