diff options
author | Akira Hatanaka <ahatanaka@apple.com> | 2018-10-01 21:51:28 +0000 |
---|---|---|
committer | Akira Hatanaka <ahatanaka@apple.com> | 2018-10-01 21:51:28 +0000 |
commit | f54514c50350743d3d1a3c5aa80cbe4bb449eb71 (patch) | |
tree | f62452e4a5c04bd32e40aa9790c4d344f55024b8 /clang/test/CodeGen/personality.c | |
parent | e7400c12b50690db79c9e3897b4864bd95acf96c (diff) |
Distinguish `__block` variables that are captured by escaping blocks
from those that aren't.
This patch changes the way __block variables that aren't captured by
escaping blocks are handled:
- Since non-escaping blocks on the stack never get copied to the heap
(see https://reviews.llvm.org/D49303), Sema shouldn't error out when
the type of a non-escaping __block variable doesn't have an accessible
copy constructor.
- IRGen doesn't have to use the specialized byref structure (see
https://clang.llvm.org/docs/Block-ABI-Apple.html#id8) for a
non-escaping __block variable anymore. Instead IRGen can emit the
variable as a normal variable and copy the reference to the block
literal. Byref copy/dispose helpers aren't needed either.
This reapplies r343518 after fixing a use-after-free bug in function
Sema::ActOnBlockStmtExpr where the BlockScopeInfo was dereferenced after
it was popped and deleted.
rdar://problem/39352313
Differential Revision: https://reviews.llvm.org/D51564
Diffstat (limited to 'clang/test/CodeGen/personality.c')
-rw-r--r-- | clang/test/CodeGen/personality.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/test/CodeGen/personality.c b/clang/test/CodeGen/personality.c index 1c533ce786c..59a6a9ccd69 100644 --- a/clang/test/CodeGen/personality.c +++ b/clang/test/CodeGen/personality.c @@ -26,6 +26,7 @@ extern void i(void); void f(void) { __block int i; + ^{ (void)i; }; g(^ { }); } |