https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Target Milestone|--- |9.5
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
Last reconfirmed| |2022-03-28
Ever confirmed|0 |1
Summary|Missing debug info for |[9/10/11/12 Regression]
|switch statement |Missing debug info for
| |switch statement
Priority|P3 |P2
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Interestingly all line number info is lost:
int foo (int x)
{
int D.1961;
int _1;
int _3;
int _4;
unsigned int _6;
_Bool _7;
long unsigned int _8;
long unsigned int _9;
_Bool _10;
<bb 2> :
_6 = (unsigned int) x_2(D);
_7 = _6 > 5;
if (_7 != 0)
goto <bb 5>; [20.00%]
else
goto <bb 3>; [80.00%]
<bb 3> :
_8 = 42 >> _6;
_9 = _8 & 1;
_10 = _9 != 0;
if (_10 != 0)
goto <bb 4>; [60.00%]
else
goto <bb 5>; [40.00%]
<bb 4> :
[t.c:8:12] _3 = 1;
[t.c:8:12] goto <bb 6>; [INV]
and the reason is the switchlower pass run at -O0 which does
beginning to process the following SWITCH statement (t.c:4) : -------
switch (x_2(D)) <default: <L3> [INV], case 1: <L0> [INV], case 3: <L0> [INV],
case 5: <L0> [INV]>
;; GIMPLE switch case clusters: BT:1-5
Removing basic block 6
but does not put any locations on the generated stmts.
