Add a per target max vector alignment field (e.g., 32-byte alignment for x86 due to
AVX). Currently, if no aligned attribute is specified the alignment of a vector is
inferred from its size. Thus, very large vectors will be over-aligned with no
benefit. Target owners should set this target max.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160209 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 3df59c3..1932413 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -2448,6 +2448,7 @@
LongDoubleWidth = 128;
LongDoubleAlign = 128;
SuitableAlign = 128;
+ MaxVectorAlign = 256;
SizeType = UnsignedLong;
IntPtrType = SignedLong;
DescriptionString = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-"
@@ -2755,6 +2756,7 @@
DarwinX86_64TargetInfo(const std::string& triple)
: DarwinTargetInfo<X86_64TargetInfo>(triple) {
Int64Type = SignedLongLong;
+ MaxVectorAlign = 256;
}
};
} // end anonymous namespace