diff options
Diffstat (limited to 'llvm/lib/Target/ARM64/ARM64ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM64/ARM64ISelLowering.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM64/ARM64ISelLowering.cpp b/llvm/lib/Target/ARM64/ARM64ISelLowering.cpp index 118007fa70c..880df0c1a81 100644 --- a/llvm/lib/Target/ARM64/ARM64ISelLowering.cpp +++ b/llvm/lib/Target/ARM64/ARM64ISelLowering.cpp @@ -630,6 +630,20 @@ unsigned ARM64TargetLowering::getMaximalGlobalOffset() const { return 4095; } +/// getGlobalMergeAlignment - Set alignment to be the max size of merged +/// global variable data structure, and make it aligned up to power of 2. +/// This way, we could guarantee the merged global variable data structure +/// doesn't cross page boundary, because usually OS always allocates page at +/// 4096-byte aligned boundary. +unsigned ARM64TargetLowering::getGlobalMergeAlignment( + StructType *MergedTy) const { + unsigned Align = getDataLayout()->getTypeAllocSize(MergedTy); + if (Align & (Align - 1)) + Align = llvm::NextPowerOf2(Align); + + return Align; +} + FastISel * ARM64TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo, const TargetLibraryInfo *libInfo) const { |
