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| author | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-03-26 23:51:11 +0000 |
|---|---|---|
| committer | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-03-26 23:51:11 +0000 |
| commit | 584afddadde2174d7fad07e59a7c7f7ff9697503 (patch) | |
| tree | 0a29b4dc71dd63cac1c341fe037ab31ad9d3d658 /gcc/regclass.c | |
| parent | a5e95c307642b849e13eecc0ef039c01a38b391c (diff) | |
| download | ppe42-gcc-584afddadde2174d7fad07e59a7c7f7ff9697503.tar.gz ppe42-gcc-584afddadde2174d7fad07e59a7c7f7ff9697503.zip | |
* regclass.c (reg_scan_mark_refs): Be more selective about
when we mark a register with REGNO_POINTER_FLAG.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@18849 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/regclass.c')
| -rw-r--r-- | gcc/regclass.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/regclass.c b/gcc/regclass.c index 396222b7192..e964e99a82c 100644 --- a/gcc/regclass.c +++ b/gcc/regclass.c @@ -1919,6 +1919,12 @@ reg_scan_mark_refs (x, insn, note_flag) if (GET_CODE (SET_DEST (x)) == REG && REGNO (SET_DEST (x)) >= FIRST_PSEUDO_REGISTER + /* If the destination pseudo is set more than once, then other + sets might not be to a pointer value (consider access to a + union in two threads of control in the presense of global + optimizations). So only set REGNO_POINTER_FLAG on the destination + pseudo if this is the only set of that pseudo. */ + && REG_N_SETS (REGNO (SET_DEST (x))) == 1 && ! REG_USERVAR_P (SET_DEST (x)) && ! REGNO_POINTER_FLAG (REGNO (SET_DEST (x))) && ((GET_CODE (SET_SRC (x)) == REG |
