diff options
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 |
