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Fix va_arg for doubles. With this patch VAARG nodes always contain the

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correct alignment information, which simplifies ExpandRes_VAARG a bit.

The patch introduces a new alignment information to TargetLoweringInfo. This is
needed since the two natural candidates cannot be used:

* The 's' in target data: If this is set to the minimal alignment of any
  argument, getCallFrameTypeAlignment would return 4 for doubles on ARM for
  example.
* The getTransientStackAlignment method. It is possible for an architecture to
  have argument less aligned than what we maintain the stack pointer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108072 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2010-07-11 04:01:49 +00:00
parent 4f8e771ae8
commit cbeeae23c3
10 changed files with 57 additions and 11 deletions
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2
include/llvm/CodeGen/SelectionDAG.h
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@@ -582,7 +582,7 @@ public:
/// getVAArg - VAArg produces a result and token chain, and takes a pointer
/// and a source value as input.
SDValue getVAArg(EVT VT, DebugLoc dl, SDValue Chain, SDValue Ptr,
SDValue SV, unsigned Align = 0);
SDValue SV, unsigned Align);
/// getAtomic - Gets a node for an atomic op, produces result and chain and
/// takes 3 operands