diff options
Diffstat (limited to 'gcc/var-tracking.c')
| -rw-r--r-- | gcc/var-tracking.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/gcc/var-tracking.c b/gcc/var-tracking.c index e33950e..815faca 100644 --- a/gcc/var-tracking.c +++ b/gcc/var-tracking.c @@ -1960,7 +1960,7 @@ dump_dataflow_set (dataflow_set *set) fprintf (dump_file, "Stack adjustment: " HOST_WIDE_INT_PRINT_DEC "\n", set->stack_adjust); - for (i = 1; i < FIRST_PSEUDO_REGISTER; i++) + for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) { if (set->regs[i]) { @@ -2212,8 +2212,32 @@ clobber_variable_part (dataflow_set *set, rtx loc, tree decl, for (node = next; node; node = next) { next = node->next; - if (REG_P (node->loc) && node->loc != loc) - var_reg_delete (set, node->loc, false); + if (node->loc != loc) + { + if (REG_P (node->loc)) + { + attrs anode, anext; + attrs *anextp; + + /* Remove the variable part from the register's + list, but preserve any other variable parts + that might be regarded as live in that same + register. */ + anextp = &set->regs[REGNO (node->loc)]; + for (anode = *anextp; anode; anode = anext) + { + anext = anode->next; + if (anode->decl == decl + && anode->offset == offset) + { + pool_free (attrs_pool, anode); + *anextp = anext; + } + } + } + + delete_variable_part (set, node->loc, decl, offset); + } } } } |