[PATCH] D20547: [safestack] Sink unsafe address computation to each use.

[Evgeniy Stepanov via llvm-commits]

eugenis created this revision.
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This is a fix for PR27844.
When replacing uses of unsafe allocas, emit the new location immediately after each use. 
Without this, the pointer stays live from the function entry to the last use, while it's usually cheaper to recalculate.

Repository:
  rL LLVM

http://reviews.llvm.org/D20547

Files:
  lib/CodeGen/SafeStack.cpp
  test/Transforms/SafeStack/array-aligned.ll
  test/Transforms/SafeStack/array.ll
  test/Transforms/SafeStack/sink-to-use.ll
  test/Transforms/SafeStack/struct.ll

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