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| author | Ian Lance Taylor <iant@google.com> | 2014-06-04 23:15:33 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2014-06-04 23:15:33 +0000 |
| commit | bae90c989cb020d17a24919ec84c0b8dd2fae2da (patch) | |
| tree | 89766166feb4ceca2d983169c5360e3f6f521b12 /libgo/runtime/go-unsafe-pointer.c | |
| parent | 82b3da6a714493644a4333bfd8205e3341ed3b8e (diff) | |
| download | gcc-bae90c989cb020d17a24919ec84c0b8dd2fae2da.zip gcc-bae90c989cb020d17a24919ec84c0b8dd2fae2da.tar.gz gcc-bae90c989cb020d17a24919ec84c0b8dd2fae2da.tar.bz2 | |
libgo: Merge from revision 18783:00cce3a34d7e of master library.
This revision was committed January 7, 2014. The next
revision deleted runtime/mfinal.c. That will be done in a
subsequent merge.
This merge changes type descriptors to add a zero field,
pointing to a zero value for that type. This is implemented
as a common variable.
* go-gcc.cc (Gcc_backend::implicit_variable): Add is_common and
alignment parameters. Permit init parameter to be NULL.
From-SVN: r211249
Diffstat (limited to 'libgo/runtime/go-unsafe-pointer.c')
| -rw-r--r-- | libgo/runtime/go-unsafe-pointer.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/libgo/runtime/go-unsafe-pointer.c b/libgo/runtime/go-unsafe-pointer.c index ca1d253..b71804a 100644 --- a/libgo/runtime/go-unsafe-pointer.c +++ b/libgo/runtime/go-unsafe-pointer.c @@ -9,6 +9,9 @@ #include "runtime.h" #include "go-type.h" +/* A pointer with a zero value. */ +static void *zero_pointer; + /* This file provides the type descriptor for the unsafe.Pointer type. The unsafe package is defined by the compiler itself, which means that there is no package to compile to define the type @@ -53,7 +56,9 @@ const struct __go_type_descriptor unsafe_Pointer = /* __uncommon */ NULL, /* __pointer_to_this */ - NULL + NULL, + /* __zero */ + &zero_pointer }; /* We also need the type descriptor for the pointer to unsafe.Pointer, @@ -94,7 +99,9 @@ const struct __go_ptr_type pointer_unsafe_Pointer = /* __uncommon */ NULL, /* __pointer_to_this */ - NULL + NULL, + /* __zero */ + &zero_pointer }, /* __element_type */ &unsafe_Pointer |