| Summary: | missed inlining extern template function | ||
|---|---|---|---|
| Product: | gcc | Reporter: | programmerjake |
| Component: | c++ | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | enhancement | CC: | webrown.cpp |
| Priority: | P3 | Keywords: | missed-optimization |
| Version: | 5.3.0 | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Known to work: | ||
| Known to fail: | Last reconfirmed: | 2016-06-26 00:00:00 | |
Confirmed. Without:
> template void fn2<false>();
No versions of GCC will inline fn2<false>
Starting in GCC 12, with that line still there, GCC does inline it now.
Dup. *** This bug has been marked as a duplicate of bug 104539 *** |
missed inlining fn2<false> version: (Ubuntu 5.3.0-3ubuntu1~14.04) 5.3.0 20151204 command: g++-5 -O3 -S -std=c++11 -xc++ - source: template <bool V> void fn2(); extern template void fn2<false>(); void fn3(); void fn() { fn2<false>(); fn3(); } template <bool V> void fn2() { } template void fn2<false>(); It generates subq $8, %rsp call void fn2<false>() addq $8, %rsp jmp fn3() It should generate jmp fn3()