Commit Graph

6 Commits

Author SHA1 Message Date
Sean Fertile d900dd0c23 Revert "[CodeGenCXX] Treat 'this' as noalias in constructors"
This reverts commit https://reviews.llvm.org/rL344150 which causes
MachineOutliner related failures on the ppc64le multistage buildbot.

llvm-svn: 344526
2018-10-15 15:43:00 +00:00
Anton Bikineev cc7e74753a [CodeGenCXX] Treat 'this' as noalias in constructors
This is currently a clang extension and a resolution
of the defect report in the C++ Standard.

Differential Revision: https://reviews.llvm.org/D46441

llvm-svn: 344150
2018-10-10 16:14:51 +00:00
Richard Smith 3f1d6de4f7 Revert r332847; it caused us to miscompile certain forms of reference initialization.
llvm-svn: 332886
2018-05-21 20:36:58 +00:00
Serge Pavlov 9f8068420a [CodeGen] Recognize more cases of zero initialization
If a variable has an initializer, codegen tries to build its value. If
the variable is large in size, building its value requires substantial
resources. It causes strange behavior from user viewpoint: compilation
of huge zero initialized arrays like:

    char data_1[2147483648u] = { 0 };

consumes enormous amount of time and memory.

With this change codegen tries to determine if variable initializer is
equivalent to zero initializer. In this case variable value is not
constructed.

This change fixes PR18978.

Differential Revision: https://reviews.llvm.org/D46241

llvm-svn: 332847
2018-05-21 16:09:54 +00:00
Richard Smith d1036128ab When rebuilding an InitListExpr, don't give it a type.
InitListExprs without types (well, with type 'void') represent not-yet-analyzed
initializer lists; InitListExpr with types fool Sema into thinking they don't
need further analysis in some cases (particularly C++17 copy omission).

llvm-svn: 322414
2018-01-12 22:21:33 +00:00
Richard Smith 872307e2ac P0017R1: In C++1z, an aggregate class can have (public non-virtual) base classes; these are initialized as if they were data members.
llvm-svn: 262963
2016-03-08 22:17:41 +00:00