return true;
return false;
+ case COMPLEX_EXPR:
+ case CONSTRUCTOR:
+ /* Constructing an object cannot trap. */
+ return false;
+
default:
/* Any floating arithmetic may trap. */
if (fp_operation && flag_trapping_math)
switch (code)
{
case TARGET_MEM_REF:
- if (TMR_SYMBOL (expr)
- && !TMR_INDEX (expr))
+ if (TREE_CODE (TMR_BASE (expr)) == ADDR_EXPR
+ && !TMR_INDEX (expr) && !TMR_INDEX2 (expr))
return false;
return !TREE_THIS_NOTRAP (expr);
return false;
/* Fallthru. */
case INDIRECT_REF:
- case MISALIGNED_INDIRECT_REF:
return !TREE_THIS_NOTRAP (expr);
case ASM_EXPR:
{
gimple_stmt_iterator gsi;
tree lab;
+ edge_iterator ei;
+ edge e;
/* We really ought not have totally lost everything following
a landing pad label. Given that BB is empty, there had better
return false;
}
+ /* The destination block must not be a regular successor for any
+ of the preds of the landing pad. Thus, avoid turning
+ <..>
+ | \ EH
+ | <..>
+ | /
+ <..>
+ into
+ <..>
+ | | EH
+ <..>
+ which CFG verification would choke on. See PR45172. */
+ FOR_EACH_EDGE (e, ei, bb->preds)
+ if (find_edge (e->src, e_out->dest))
+ return false;
+
/* Attempt to move the PHIs into the successor block. */
if (cleanup_empty_eh_merge_phis (e_out->dest, bb, e_out, false))
{
/* If the block is totally empty, look for more unsplitting cases. */
if (gsi_end_p (gsi))
- return cleanup_empty_eh_unsplit (bb, e_out, lp);
+ {
+ /* For the degenerate case of an infinite loop bail out. */
+ if (e_out->dest == bb)
+ return false;
+
+ return cleanup_empty_eh_unsplit (bb, e_out, lp);
+ }
/* The block should consist only of a single RESX statement. */
resx = gsi_stmt (gsi);