this is not an optional transformation on SPARC and is now handled
directly by instruction selection.
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deletes it, but we were merrily trying to fix the operands of that
instruction anyway! Instead, fix the replacement instruction.
(2) An Improvement: Check for and extract global values in all operands,
not just in known pointer operands. For example, they can occur in
call arguments, and probably other unforeseeable places as well.
This also eliminates the special-case handling of Load and Store.
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globals in some other places may not have been pulled out either;
globals in phi operands were being put just before the phi instead of
in the predecessor basic blocks.
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instructions so that (a) constant folding is done automatically before
code generation, and (b) selection does not have to deal with them.
Also, check for ConstantPointerRefs in additional to GlobalValues
when creating a GEP to load a global address.
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Original logs for PreSelection.cpp:
revision 1.2
date: 2002/09/17 23:50:32; author: lattner; state: Exp; lines: +1 -3
Don't put default parameter values into .cpp files, it breaks 3.x compilers
revision 1.1
date: 2002/09/16 15:31:13; author: vadve; state: Exp;
New preselection pass that specializes LLVM code for a target machine,
while remaining in legal portable LLVM form and preserving type
information and type safety.
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