Derek Schuff c22cdb7203 Fix miscompile due to StackColoring incorrectly merging stack slots (PR15707) ... IR optimisation passes can result in a basic block that contains: llvm.lifetime.start(%buf) ... llvm.lifetime.end(%buf) ... llvm.lifetime.start(%buf) Before this change, calculateLiveIntervals() was ignoring the second lifetime.start() and was regarding %buf as being dead from the lifetime.end() through to the end of the basic block. This can cause StackColoring to incorrectly merge %buf with another stack slot. Fix by removing the incorrect Starts[pos].isValid() and Finishes[pos].isValid() checks. Just doing: Starts[pos] = Indexes->getMBBStartIdx(MBB); Finishes[pos] = Indexes->getMBBEndIdx(MBB); unconditionally would be enough to fix the bug, but it causes some test failures due to stack slots not being merged when they were before. So, in order to keep the existing tests passing, treat LiveIn and LiveOut separately rather than approximating the live ranges by merging LiveIn and LiveOut. This fixes PR15707. Patch by Mark Seaborn. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181922 91177308-0d34-0410-b5e6-96231b3b80d8		2013-05-15 21:15:09 +00:00
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CodeGen	Fix miscompile due to StackColoring incorrectly merging stack slots (PR15707)	2013-05-15 21:15:09 +00:00
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FileCheck	Add 'CHECK-DAG' support	2013-05-14 20:34:12 +00:00
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MC	[PowerPC] Remove need for adjustFixupOffst hack	2013-05-15 15:07:06 +00:00
Object	Object: Fix Mach-O relocation printing.	2013-05-14 22:41:29 +00:00
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Transforms	LoopVectorize: Hoist conditional loads if possible	2013-05-15 01:44:30 +00:00
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