[ARM] Fix Neon vector type alignment to 64-bit
This is restricted version of patch - https://reviews.llvm.org/D33205
that I reverted as it was leading to ABI breaks on darwin etc.
This patch restricts the fix to AAPCS (Android remains 128-bit).
Reviewed by: Renato Golin, Stephen Hines
Differential Revision: https://reviews.llvm.org/D33786
llvm-svn: 304889
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index f939bfb..a304a78 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -5385,6 +5385,10 @@
// ARM has atomics up to 8 bytes
setAtomic();
+ // Maximum alignment for ARM NEON data types should be 64-bits (AAPCS)
+ if (IsAAPCS && (Triple.getEnvironment() != llvm::Triple::Android))
+ MaxVectorAlign = 64;
+
// Do force alignment of members that follow zero length bitfields. If
// the alignment of the zero-length bitfield is greater than the member
// that follows it, `bar', `bar' will be aligned as the type of the