This commit allows vectorized loops to be unrolled by a factor of 2 for AArch64.

A new test case is also added for ARM64.

Patched by Z.Zheng

llvm-svn: 206563

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
index e2a16478741..b2fb41ab5a2 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -92,6 +92,7 @@ public:
     return 64;
   }
 
+  unsigned getMaximumUnrollFactor() const override { return 2; }
   /// @}
 };