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| author | Andrew Hsieh <andrewhsieh@google.com> | 2014-10-16 11:26:05 +0800 |
|---|---|---|
| committer | Andrew Hsieh <andrewhsieh@google.com> | 2014-10-16 11:35:01 +0800 |
| commit | 0b6ca53fdaa40544ad77e922ec7f6f6757e76df3 (patch) | |
| tree | cae4137a12833ce90f90bd3c41428fbaaa857bf2 | |
| parent | 22fe6dc6b3fb322907f147382cfdbd8bebe22e66 (diff) | |
| download | llvm-0b6ca53fdaa40544ad77e922ec7f6f6757e76df3.tar.gz | |
Set aarch64-fix-cortex-a53-835769 as default for AArch64
See previous CLs for details about Cortex-A53 erratum (835769)
Flag aarch64-fix-cortex-a53-835769 is set to 1 or 0 by clang,
depending on the presence of -mfix-cortex-a53-835769 or
-mno-fix-cortex-a53-835769. If neither is given,
this CL changes the default to "true" for aarch64-fix-cortex-a53-835769.
It makes sense to have this workaround enabled by default in Android
when apps generated by NDK toolchains can potentially run on affected A53.
Android platform clang can specify -mno-fix-cortex-a53-835769 to disable this
workaround for A53 known to be not affected.
This changes also match the behavior in GCC r216079 when it's configured with
--enable-fix-cortex-a53-835769, which is the case for NDK toolchains.
Change-Id: I56d6c273f79c25d18e2cdd1b61015f35082bbb23
| -rw-r--r-- | lib/Target/AArch64/AArch64TargetMachine.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Target/AArch64/AArch64TargetMachine.cpp b/lib/Target/AArch64/AArch64TargetMachine.cpp index 20b23b6ca08..15728ab9580 100644 --- a/lib/Target/AArch64/AArch64TargetMachine.cpp +++ b/lib/Target/AArch64/AArch64TargetMachine.cpp @@ -62,7 +62,7 @@ EnableAtomicTidy("aarch64-atomic-cfg-tidy", cl::Hidden, static cl::opt<bool> EnableA53Fix835769("aarch64-fix-cortex-a53-835769", cl::Hidden, cl::desc("Work around Cortex-A53 erratum 835769"), - cl::init(false)); + cl::init(true)); extern "C" void LLVMInitializeAArch64Target() { // Register the target. |