[PATCH] D18471: [CodeGen] Don't assume that fixed stack objects are aligned in a stack-realigned function.

[Charles Davis via llvm-commits]

cdavis5x created this revision.
cdavis5x added reviewers: hfinkel, qcolombet.
cdavis5x added a subscriber: llvm-commits.

After we make the adjustment, we can assume that for local allocas, but
not for stack parameters, the return address, or any other fixed stack
object (which has a negative offset and therefore lies prior to the
adjusted SP).

Fixes PR26662.

http://reviews.llvm.org/D18471

Files:
  include/llvm/CodeGen/MachineFrameInfo.h
  lib/CodeGen/MachineFunction.cpp
  test/CodeGen/X86/stack-align.ll

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