http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55498
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-12-13
Ever Confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-13
11:41:28 UTC ---
Confirmed. It needs -O3 (or -fipa-cp-clone) to actually get to the point to
devirtualize all indirect calls (thus inline print and one/twoStrategy).
Jump functions:
Jump functions of caller printf:
Jump functions of caller main:
callsite main/8 -> print/7 :
param 0: CONST: twoStrategy
callsite main/8 -> print/7 :
param 0: CONST: oneStrategy
good!
Propagating constants:
Not considering main for cloning; no hot calls.
Not considering twoStrategy for cloning; no hot calls.
Not considering two for cloning; no hot calls.
Not considering oneStrategy for cloning; no hot calls.
Not considering one for cloning; no hot calls.
so it cloned print(), good!
print.constprop.1/11 (print.constprop.1) @0x7f2c26dfa940
Type: function
Visibility:
References: twoStrategy/6 (addr)
Referring:
Clone of print/7
Availability: local
Function flags: analyzed local finalized
Called by: main/8 (3.00 per call)
Calls: twoStrategy/6 (1.00 per call) twoStrategy/6 (1.00 per call) printf/9
(1.00 per call) printf/9 (1.00 per call)
Has 2 outgoing edges for indirect calls.
But the issue is that there are no return functions and thus we cannot
discover the direct call for
fn = indirect ();
fn ();
at IPA time even when indirect () returns just a constant.
We need iteration for this at the moment. Or better, IPA-CP needs
return functions implemented.
