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  1. Jul 14, 2011
    • Eric Christopher's avatar
      Check register class matching instead of width of type matching · 92464be2
      Eric Christopher authored 
      when determining validity of matching constraint. Allow i1
types access to the GR8 reg class for x86.

Fixes PR10352 and rdar://9777108

llvm-svn: 135180
      92464be2
    • Nadav Rotem's avatar
      · 771f2967
      Nadav Rotem authored 
      [VECTOR-SELECT]
During type legalization we often use the SIGN_EXTEND_INREG SDNode.
When this SDNode is legalized during the LegalizeVector phase, it is
scalarized because non-simple types are automatically marked to be expanded.
In this patch we add support for lowering SIGN_EXTEND_INREG manually.
This fixes CodeGen/X86/vec_sext.ll when running with the '-promote-elements'
flag.

llvm-svn: 135144
      771f2967
  3. Jul 13, 2011
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  7. Jun 29, 2011
  9. Jun 28, 2011
    • Jakob Stoklund Olesen's avatar
      Clean up the handling of the x87 fp stack to make it more robust. · 7297e7e2
      Jakob Stoklund Olesen authored 
      Drop the FpMov instructions, use plain COPY instead.

Drop the FpSET/GET instruction for accessing fixed stack positions.
Instead use normal COPY to/from ST registers around inline assembly, and
provide a single new FpPOP_RETVAL instruction that can access the return
value(s) from a call. This is still necessary since you cannot tell from
the CALL instruction alone if it returns anything on the FP stack. Teach
fast isel to use this.

This provides a much more robust way of handling fixed stack registers -
we can tolerate arbitrary FP stack instructions inserted around calls
and inline assembly. Live range splitting could sometimes break x87 code
by inserting spill code in unfortunate places.

As a bonus we handle floating point inline assembly correctly now.

llvm-svn: 134018
      7297e7e2
  11. Jun 25, 2011
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  19. Jun 15, 2011
    • John McCall's avatar
      Add a new function attribute, nonlazybind, which inhibits lazy-loading · 4b7a8d68
      John McCall authored 
      optimizations when emitting calls to the function;  instead those calls may
use faster relocations which require the function to be immediately resolved
upon loading the dynamic object featuring the call.  This is useful when it
is known that the function will be called frequently and pervasively and
therefore there is no merit in delaying binding of the function.

Currently only implemented for x86-64, where it turns into a call through
the global offset table.

Patch by Dan Gohman, who assures me that he's going to add LangRef documentation
for this once it's committed.

llvm-svn: 133080
      4b7a8d68
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