commit fabf7fe5f86db42d9bdc98942c3d522cf5889d53
author Sam Parker <sam.parker@arm.com> Wed Aug 15 13:29:50 2018 +0000
committer Sam Parker <sam.parker@arm.com> Wed Aug 15 13:29:50 2018 +0000
tree 5cef65e6f74e1bf082eb6740043e1160f15a0620
parent 8b4bd09e2276aaa2bf5f074e71c04a911fdf4117

[ARM] TypeSize lower bound for ARMCodeGenPrepare

We only try to promote types with are smaller than 16-bits, but we
also need to check that the type is not less than 8-bits.

Differential Revision: https://reviews.llvm.org/D50769

llvm-svn: 339770

llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp

diff --git a/llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp b/llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp
index 3151621..0774b74 100644
--- a/llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp
+++ b/llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp
@@ -562,7 +562,7 @@
 bool ARMCodeGenPrepare::TryToPromote(Value *V) {
   OrigTy = V->getType();
   TypeSize = OrigTy->getPrimitiveSizeInBits();
-  if (TypeSize > 16)
+  if (TypeSize > 16 || TypeSize < 8)
     return false;
 
   if (!isSupportedValue(V) || !shouldPromote(V) || !isLegalToPromote(V))