From: Matthijs Kooijman <m.kooijman@student.utwente.nl>
Date: Thu, 18 Jun 2009 12:47:56 +0000 (+0200)
Subject: Add a substitute helper function.
X-Git-Url: https://git.stderr.nl/gitweb?a=commitdiff_plain;h=56c7e95a268187a0dd4aea1fa9e669755247c79b;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

Add a substitute helper function.

This function performs a number of substitutions on a CoreExpr, by using
the CoreSubst module.
---

diff --git a/NormalizeTools.hs b/NormalizeTools.hs
index 91e5b45..193af61 100644
--- a/NormalizeTools.hs
+++ b/NormalizeTools.hs
@@ -23,6 +23,7 @@ import qualified SrcLoc
 import qualified Type
 import qualified IdInfo
 import qualified CoreUtils
+import qualified CoreSubst
 import Outputable ( showSDoc, ppr, nest )
 
 -- Local imports
@@ -140,3 +141,9 @@ mkUnique = Trans.lift $ do
     let (us', us'') = UniqSupply.splitUniqSupply us
     putA tsUniqSupply us'
     return $ UniqSupply.uniqFromSupply us''
+
+-- Replace each of the binders given with the coresponding expressions in the
+-- given expression.
+substitute :: [(CoreBndr, CoreExpr)] -> CoreExpr -> CoreExpr
+substitute replace expr = CoreSubst.substExpr subs expr
+    where subs = foldl (\s (b, e) -> CoreSubst.extendIdSubst s b e) CoreSubst.emptySubst replace