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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1999-02-14 23:44:39 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1999-02-14 16:44:39 -0700 |
| commit | 6ba14f92807c0c891fab185531fbea57b3bf298f (patch) | |
| tree | 15dba891552029856cf0f998de87ad45a413d63b | |
| parent | c954bd01573a8027f9e07f5a56adc53ff3fc939d (diff) | |
| download | gcc-6ba14f92807c0c891fab185531fbea57b3bf298f.zip gcc-6ba14f92807c0c891fab185531fbea57b3bf298f.tar.gz gcc-6ba14f92807c0c891fab185531fbea57b3bf298f.tar.bz2 | |
alias.c (init_alias_analysis): Avoid self-referential value when setting reg_known_value from REG_EQUAL notes.
* alias.c (init_alias_analysis): Avoid self-referential value
when setting reg_known_value from REG_EQUAL notes.
From-SVN: r25211
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/alias.c | 3 |
2 files changed, 7 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 16b3998..e572ee3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Mon Feb 15 00:40:45 1999 J"orn Rennecke <amylaar@cygnus.co.uk> + + * alias.c (init_alias_analysis): Avoid self-referential value + when setting reg_known_value from REG_EQUAL notes. + Sun Feb 14 23:12:10 1999 Richard Henderson <rth@cygnus.com> * i386.c (legitimate_address_p): Verify modes of base and index. diff --git a/gcc/alias.c b/gcc/alias.c index 876b3ef..eae57c7 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -1465,7 +1465,8 @@ init_alias_analysis () && (((note = find_reg_note (insn, REG_EQUAL, 0)) != 0 && REG_N_SETS (REGNO (SET_DEST (set))) == 1) || (note = find_reg_note (insn, REG_EQUIV, NULL_RTX)) != 0) - && GET_CODE (XEXP (note, 0)) != EXPR_LIST) + && GET_CODE (XEXP (note, 0)) != EXPR_LIST + && ! reg_overlap_mentioned_p (SET_DEST (set), XEXP (note, 0))) { int regno = REGNO (SET_DEST (set)); reg_known_value[regno] = XEXP (note, 0); |