https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78229
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-11-07
Component|rtl-optimization |target
Target Milestone|--- |6.3
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Happens after forwprop.
t.i: In function ‘void fn3()’:
t.i:8:10: error: BB 6 can not throw but has an EH edge
void fn3() {
^~~
looks like __builtin_ia32_tzcnt_u32 is not marked NOTHROW but we now fold
that in the backend. CCing Jakub - this is a recent regression. Foldings
may not transfer EH info themselves.
Index: gcc/config/i386/i386.c
===================================================================
--- gcc/config/i386/i386.c (revision 241891)
+++ gcc/config/i386/i386.c (working copy)
@@ -37664,7 +37664,7 @@ ix86_gimple_fold_builtin (gimple_stmt_it
gsi_insert_before (gsi, g, GSI_SAME_STMT);
g = gimple_build_assign (gimple_call_lhs (stmt), NOP_EXPR, lhs);
gimple_set_location (g, loc);
- gsi_replace (gsi, g, true);
+ gsi_replace (gsi, g, false);
return true;
}
break;
fixes this. Otherwise untested.
