Fix the gtHashValue to properly hash all the bits when we have a 64-bit item

1 files changed, 16 insertions, 3 deletions

diff --git a/src/jit/compiler.hpp b/src/jit/compiler.hpp
index 9743173f5a..acc7bb688e 100644
--- a/src/jit/compiler.hpp
+++ b/src/jit/compiler.hpp
@@ -175,12 +175,25 @@ inline BOOL genMaxOneBit(unsigned value)
  *  Given a value that has exactly one bit set, return the position of that
  *  bit, in other words return the logarithm in base 2 of the given value.
  */
-
 inline unsigned genLog2(unsigned value)
 {
     return BitPosition(value);
 }
 
+// Given an unsigned 64-bit value, returns the lower 32-bits in unsigned format
+//
+inline unsigned ulo32(unsigned __int64 value)
+{
+    return static_cast<unsigned>(value);
+}
+
+// Given an unsigned 64-bit value, returns the upper 32-bits in unsigned format
+//
+inline unsigned uhi32(unsigned __int64 value)
+{
+    return static_cast<unsigned>(value >> 32);
+}
+
 /*****************************************************************************
  *
  *  Given a value that has exactly one bit set, return the position of that
@@ -189,8 +202,8 @@ inline unsigned genLog2(unsigned value)
 
 inline unsigned genLog2(unsigned __int64 value)
 {
-    unsigned lo32 = (unsigned)value;
-    unsigned hi32 = (unsigned)(value >> 32);
+    unsigned lo32 = ulo32(value);
+    unsigned hi32 = uhi32(value);
 
     if (lo32 != 0)
     {