From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Tue, 14 Jul 2015 18:40:59 +0000 (+0000)
Subject: Add support for on-disk hash table lookup with a known hash, for situations where... 
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=77906b996433e27dc63cb7e2a0b1ca86678d4932;p=oota-llvm.git

Add support for on-disk hash table lookup with a known hash, for situations where the same key will be looked up in multiple tables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242179 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Support/OnDiskHashTable.h b/include/llvm/Support/OnDiskHashTable.h
index 0f097f28728..08e277ad5ce 100644
--- a/include/llvm/Support/OnDiskHashTable.h
+++ b/include/llvm/Support/OnDiskHashTable.h
@@ -280,13 +280,19 @@ public:
   };
 
   /// \brief Look up the stored data for a particular key.
-  iterator find(const external_key_type &EKey, Info *InfoPtr = 0) {
-    if (!InfoPtr)
-      InfoPtr = &InfoObj;
-
-    using namespace llvm::support;
+  iterator find(const external_key_type &EKey, Info *InfoPtr = nullptr) {
     const internal_key_type &IKey = InfoObj.GetInternalKey(EKey);
     hash_value_type KeyHash = InfoObj.ComputeHash(IKey);
+    return find_hashed(IKey, KeyHash, InfoPtr);
+  }
+
+  /// \brief Look up the stored data for a particular key with a known hash.
+  iterator find_hashed(const internal_key_type &IKey, hash_value_type KeyHash,
+                       Info *InfoPtr = nullptr) {
+    using namespace llvm::support;
+
+    if (!InfoPtr)
+      InfoPtr = &InfoObj;
 
     // Each bucket is just an offset into the hash table file.
     offset_type Idx = KeyHash & (NumBuckets - 1);