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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44543 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-12-03 19:43:18 +00:00
parent 8528e78f0d
commit 4cf4b69330
1 changed files with 5 additions and 2 deletions
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7
lib/Transforms/Scalar/SimplifyCFG.cpp
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@ -7,14 +7,17 @@
//
//===----------------------------------------------------------------------===//
//
// This file implements dead code elimination and basic block merging.
// Specifically:
// This file implements dead code elimination and basic block merging, along
// with a collection of other peephole control flow optimizations. For example:
//
// * Removes basic blocks with no predecessors.
// * Merges a basic block into its predecessor if there is only one and the
// predecessor only has one successor.
// * Eliminates PHI nodes for basic blocks with a single predecessor.
// * Eliminates a basic block that only contains an unconditional branch.
// * Changes invoke instructions to nounwind functions to be calls.
// * Change things like "if (x) if (y)" into "if (x&y)".
// * etc..
//
//===----------------------------------------------------------------------===//