Haskell Program Coverage

This large checkin is the new ghc version of Haskell
Program Coverage, an expression-level coverage tool for Haskell.

Parts:

 - Hpc.[ch] - small runtime support for Hpc; reading/writing *.tix files.
 - Coverage.lhs - Annotates the HsSyn with coverage tickboxes.
  - New Note's in Core,
      - TickBox      -- ticked on entry to sub-expression
      - BinaryTickBox  -- ticked on exit to sub-expression, depending
	       	     -- on the boolean result.

  - New Stg level TickBox (no BinaryTickBoxes, though) 

You can run the coverage tool with -fhpc at compile time. 
Main must be compiled with -fhpc. 
				      

1 files changed, 10 insertions, 0 deletions

diff --git a/rts/Hpc.h b/rts/Hpc.h
new file mode 100644
index 0000000000..a0ff40b06c
--- /dev/null
+++ b/rts/Hpc.h
@@ -0,0 +1,10 @@
+#ifndef HPC_H
+#define HPC_H
+
+extern void startupHpc(void);
+extern void exitHpc(void);
+
+#endif /* HPC_H */
+
+
+