ARM: decide whether to use movw/movt based on "minsize" attribute.

llvm-svn: 196102

1 files changed, 6 insertions, 1 deletions

diff --git a/llvm/lib/Target/ARM/ARMSubtarget.h b/llvm/lib/Target/ARM/ARMSubtarget.h
index ca5ba8541f7..d6e8c81fb76 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.h
+++ b/llvm/lib/Target/ARM/ARMSubtarget.h
@@ -64,6 +64,10 @@ protected:
   bool HasFPARMv8;
   bool HasNEON;
 
+  /// MinSize - True if the function being compiled has the "minsize" attribute
+  /// and should be optimised for size at the expense of speed.
+  bool MinSize;
+
   /// UseNEONForSinglePrecisionFP - if the NEONFP attribute has been
   /// specified. Use the method useNEONForSinglePrecisionFP() to
   /// determine if NEON should actually be used.
@@ -270,6 +274,7 @@ public:
   bool hasCrypto() const { return HasCrypto; }
   bool hasCRC() const { return HasCRC; }
   bool hasVirtualization() const { return HasVirtualization; }
+  bool isMinSize() const { return MinSize; }
   bool useNEONForSinglePrecisionFP() const {
     return hasNEON() && UseNEONForSinglePrecisionFP; }
 
@@ -327,7 +332,7 @@ public:
 
   bool isR9Reserved() const { return IsR9Reserved; }
 
-  bool useMovt() const { return UseMovt && hasV6T2Ops(); }
+  bool useMovt() const { return UseMovt && !isMinSize(); }
   bool supportsTailCall() const { return SupportsTailCall; }
 
   bool allowsUnalignedMem() const { return AllowsUnalignedMem; }