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Switch to WeakVHs in the value mapper, and aggressively prune dead basic

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blocks in the function cloner. This removes the last case of trivially
dead code that I've been seeing in the wild getting inlined, analyzed,
re-inlined, optimized, only to be deleted. Nukes a FIXME from the
cleanup tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153572 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2012-03-28 08:38:27 +00:00
parent 9fc5c83fb7
commit afff33001a
3 changed files with 24 additions and 14 deletions
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2
include/llvm/Transforms/Utils/ValueMapper.h
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@@ -20,7 +20,7 @@
namespace llvm {
class Value;
class Instruction;
typedef ValueMap<const Value *, TrackingVH<Value> > ValueToValueMapTy;
typedef ValueMap<const Value *, WeakVH> ValueToValueMapTy;
/// ValueMapTypeRemapper - This is a class that can be implemented by clients
/// to remap types when cloning constants and instructions.