diff options
Diffstat (limited to 'lib/Target/ARM/ARMSubtarget.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMSubtarget.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMSubtarget.cpp b/lib/Target/ARM/ARMSubtarget.cpp index 8a4052b..6ecb512 100644 --- a/lib/Target/ARM/ARMSubtarget.cpp +++ b/lib/Target/ARM/ARMSubtarget.cpp @@ -27,6 +27,10 @@ static cl::opt<bool> UseMOVT("arm-use-movt", cl::init(true), cl::Hidden); +static cl::opt<bool> +StrictAlign("arm-strict-align", cl::Hidden, + cl::desc("Disallow all unaligned memory accesses")); + ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS, bool isT) : ARMArchVersion(V4) @@ -47,6 +51,7 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS, , HasDataBarrier(false) , Pref32BitThumb(false) , FPOnlySP(false) + , AllowsUnalignedMem(false) , stackAlignment(4) , CPUString("generic") , TargetType(isELF) // Default to ELF unless otherwise specified. @@ -122,6 +127,11 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS, if (!isThumb() || hasThumb2()) PostRAScheduler = true; + + // v6+ may or may not support unaligned mem access depending on the system + // configuration. + if (!StrictAlign && hasV6Ops() && isTargetDarwin()) + AllowsUnalignedMem = true; } /// GVIsIndirectSymbol - true if the GV will be accessed via an indirect symbol. |