diff options
| author | Wei Mi <wmi@google.com> | 2017-09-22 16:30:00 +0000 |
|---|---|---|
| committer | Wei Mi <wmi@google.com> | 2017-09-22 16:30:00 +0000 |
| commit | 5c5aea8028aa58b347eaf3b552bc158a2a85ee18 (patch) | |
| tree | 59f3d84c43b86a2155750ad356c2183a68bd67d3 /include/clang/Basic/TargetInfo.h | |
| parent | 9687f1d501bfff51838e70d124cd9a7463e1a727 (diff) | |
[Atomic][X8664] set max atomic inline width according to the target
This is to fix PR31620. MaxAtomicInlineWidth is set to 128 for x86_64. However
for target without cx16 support, 128 atomic operation will generate __sync_*
libcalls. The patch set MaxAtomicInlineWidth to 64 if the target doesn't support
cx16.
Differential Revision: https://reviews.llvm.org/D38046
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@313992 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/clang/Basic/TargetInfo.h')
| -rw-r--r-- | include/clang/Basic/TargetInfo.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/clang/Basic/TargetInfo.h b/include/clang/Basic/TargetInfo.h index 8bf31b075f..38a7bfed87 100644 --- a/include/clang/Basic/TargetInfo.h +++ b/include/clang/Basic/TargetInfo.h @@ -448,6 +448,9 @@ public: /// \brief Return the maximum width lock-free atomic operation which can be /// inlined given the supported features of the given target. unsigned getMaxAtomicInlineWidth() const { return MaxAtomicInlineWidth; } + /// \brief Set the maximum inline or promote width lock-free atomic operation + /// for the given target. + virtual void setMaxAtomicWidth() {} /// \brief Returns true if the given target supports lock-free atomic /// operations at the specified width and alignment. virtual bool hasBuiltinAtomic(uint64_t AtomicSizeInBits, |