diff options
| author | Kai Luo <lkail@cn.ibm.com> | 2022-07-27 01:27:07 +0000 |
|---|---|---|
| committer | Kai Luo <lkail@cn.ibm.com> | 2022-07-27 01:56:25 +0000 |
| commit | 1cbaf681b0f1e7257e7e2a63d290a20216668f17 (patch) | |
| tree | 00e5e4cda4ef2a017c85976429cf60e4adaca827 /clang/include | |
| parent | d6e1e0a0190d3b900c0404b21c7d4dd1458e56a3 (diff) | |
| download | llvm-1cbaf681b0f1e7257e7e2a63d290a20216668f17.zip llvm-1cbaf681b0f1e7257e7e2a63d290a20216668f17.tar.gz llvm-1cbaf681b0f1e7257e7e2a63d290a20216668f17.tar.bz2 | |
[clang][AIX] Add option to control quadword lock free atomics ABI on AIX
We are supporting quadword lock free atomics on AIX. For the situation that users on AIX are using a libatomic that is lock-based for quadword types, we can't enable quadword lock free atomics by default on AIX in case user's new code and existing code accessing the same shared atomic quadword variable, we can't guarentee atomicity. So we need an option to enable quadword lock free atomics on AIX, thus we can build a quadword lock-free libatomic(also for advanced users considering atomic performance critical) for users to make the transition smooth.
Reviewed By: shchenz
Differential Revision: https://reviews.llvm.org/D127189
Diffstat (limited to 'clang/include')
| -rw-r--r-- | clang/include/clang/Basic/LangOptions.def | 1 | ||||
| -rw-r--r-- | clang/include/clang/Driver/Options.td | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/clang/include/clang/Basic/LangOptions.def b/clang/include/clang/Basic/LangOptions.def index 6fb31c5..ad36682 100644 --- a/clang/include/clang/Basic/LangOptions.def +++ b/clang/include/clang/Basic/LangOptions.def @@ -195,6 +195,7 @@ VALUE_LANGOPT(DoubleSize , 32, 0, "width of double") VALUE_LANGOPT(LongDoubleSize , 32, 0, "width of long double") LANGOPT(PPCIEEELongDouble , 1, 0, "use IEEE 754 quadruple-precision for long double") LANGOPT(EnableAIXExtendedAltivecABI , 1, 0, "__EXTABI__ predefined macro") +LANGOPT(EnableAIXQuadwordAtomicsABI , 1, 0, "Use 16-byte atomic lock free semantics") COMPATIBLE_VALUE_LANGOPT(PICLevel , 2, 0, "__PIC__ level") COMPATIBLE_VALUE_LANGOPT(PIE , 1, 0, "is pie") LANGOPT(ROPI , 1, 0, "Read-only position independence") diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td index b9c2e4d..3cab37b 100644 --- a/clang/include/clang/Driver/Options.td +++ b/clang/include/clang/Driver/Options.td @@ -3679,6 +3679,10 @@ def mabi_EQ_vec_extabi : Flag<["-"], "mabi=vec-extabi">, Group<m_Group>, Flags<[ MarshallingInfoFlag<LangOpts<"EnableAIXExtendedAltivecABI">>; def mabi_EQ_vec_default : Flag<["-"], "mabi=vec-default">, Group<m_Group>, Flags<[CC1Option]>, HelpText<"Enable the default Altivec ABI on AIX (AIX only). Uses only volatile vector registers.">; +def mabi_EQ_quadword_atomics : Flag<["-"], "mabi=quadword-atomics">, + Group<m_Group>, Flags<[CC1Option]>, + HelpText<"Enable quadword atomics ABI on AIX (AIX PPC64 only). Uses lqarx/stqcx. instructions.">, + MarshallingInfoFlag<LangOpts<"EnableAIXQuadwordAtomicsABI">>; def mvsx : Flag<["-"], "mvsx">, Group<m_ppc_Features_Group>; def mno_vsx : Flag<["-"], "mno-vsx">, Group<m_ppc_Features_Group>; def msecure_plt : Flag<["-"], "msecure-plt">, Group<m_ppc_Features_Group>; |