Minor JIT changes

Add a useful assert about SP to FP offsets.

Add "const" to a few member functions.

2 files changed, 5 insertions, 4 deletions

diff --git a/src/jit/codegencommon.cpp b/src/jit/codegencommon.cpp
index b96f5c0956..a6a3862100 100644
--- a/src/jit/codegencommon.cpp
+++ b/src/jit/codegencommon.cpp
@@ -236,6 +236,7 @@ int CodeGenInterface::genSPtoFPdelta()
 
     delta = -genCallerSPtoInitialSPdelta() + genCallerSPtoFPdelta();
 
+    assert(delta >= 0);
     return delta;
 }
 
diff --git a/src/jit/codegeninterface.h b/src/jit/codegeninterface.h
index cb8cf61180..da146f2a8f 100644
--- a/src/jit/codegeninterface.h
+++ b/src/jit/codegeninterface.h
@@ -215,14 +215,14 @@ public:
 // Arguments are accessed relative to the Frame Pointer (EBP), and
 // locals are accessed relative to the Stack Pointer (ESP).
 public:
-    bool                doDoubleAlign()                  { return m_cgDoubleAlign; }
-    void                setDoubleAlign(bool value)       { m_cgDoubleAlign = value; }
-    bool                doubleAlignOrFramePointerUsed()      { return isFramePointerUsed() || doDoubleAlign(); }
+    bool                doDoubleAlign() const                 { return m_cgDoubleAlign; }
+    void                setDoubleAlign(bool value)            { m_cgDoubleAlign = value; }
+    bool                doubleAlignOrFramePointerUsed() const { return isFramePointerUsed() || doDoubleAlign(); }
 private:
     bool                m_cgDoubleAlign;
 #else // !DOUBLE_ALIGN
 public:
-    bool                doubleAlignOrFramePointerUsed()      { return isFramePointerUsed(); }
+    bool                doubleAlignOrFramePointerUsed() const { return isFramePointerUsed(); }
 #endif // !DOUBLE_ALIGN