| commit | 4b8d0d4d7fd245ef85c7801e7838845502a5a61d | |
| author | Jason Merrill <jason@redhat.com> | |
| Mon, 1 May 2023 21:41:44 +0000 (1 17:41 -0400) | ||
| committer | Jason Merrill <jason@redhat.com> | |
| Tue, 2 May 2023 20:24:15 +0000 (2 16:24 -0400) | ||
| tree | ee8437c91f6467f278d48bb59a956ae1ce330b9f | treesnapshot (tar.gz zip) |
| parent | bc24c51c0ccd64617864897ad071c98004ffc0a4 | commitdiff |
c++: std::variant slow to compile [PR109678]
Here, when dealing with a class with a complex subobject structure, we would
try and fail to find the relevant FIELD_DECL for an empty base before giving
up. And we would do this at each level, in a combinatorially problematic
way. Instead, we should check for an empty base first.
PR c++/109678
gcc/cp/ChangeLog:
* constexpr.cc (cxx_fold_indirect_ref_1): Handle empty base first.
gcc/testsuite/ChangeLog:
* g++.dg/cpp1z/variant1.C: New test.
Here, when dealing with a class with a complex subobject structure, we would
try and fail to find the relevant FIELD_DECL for an empty base before giving
up. And we would do this at each level, in a combinatorially problematic
way. Instead, we should check for an empty base first.
PR c++/109678
gcc/cp/ChangeLog:
* constexpr.cc (cxx_fold_indirect_ref_1): Handle empty base first.
gcc/testsuite/ChangeLog:
* g++.dg/cpp1z/variant1.C: New test.
| gcc/cp/constexpr.cc | diffblobblamehistory | |
| gcc/testsuite/g++.dg/cpp1z/variant1.C | [new file with mode: 0644] | blob |