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tweak ARG_POINTER_CFA_OFFSET docs
From-SVN: r32760
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@ -2316,9 +2316,11 @@ during virtual register instantiation.
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The default value for this macro is @code{FIRST_PARM_OFFSET (fundecl)},
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which is correct for most machines; in general, the arguments are found
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immediately before the stack frame. See @file{function.c} for details.
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immediately before the stack frame. Note that this is not the case on
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some targets that save registers into the caller's frame, such as SPARC
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and rs6000, and so such targets need to define this macro.
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You only need to define this macro if this default is incorrect, and you
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You only need to define this macro if the default is incorrect, and you
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want to support call frame debugging information like that provided by
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DWARF 2.
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