Provide descriptions for the TargetInstrInfo and TargetFrameInfo classes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22466 91177308-0d34-0410-b5e6-96231b3b80d8
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<a name="targetinstrinfo">The <tt>TargetInstrInfo</tt> class</a>
</div>
+<div class="doc_text">
+ <p>The <tt>TargetInstrInfo</tt> class is used to describe the machine
+ instructions supported by the target. It is essentially an array of
+ <tt>TargetInstrDescriptor</tt> objects, each of which describes one
+ instruction the target supports. Descriptors define things like the mnemonic
+ for the opcode, the number of operands, the size of the largets immediate
+ field the instruction can contain, the latency of the instruction in machine
+ cycles, etc.</p>
+</div>
+
<!-- ======================================================================= -->
<div class="doc_subsection">
<a name="targetframeinfo">The <tt>TargetFrameInfo</tt> class</a>
</div>
+<div class="doc_text">
+ <p>The <tt>TargetFrameInfo</tt> class is used to provide information about the
+ stack frame layout of the target. It holds the direction of stack growth,
+ the known stack alignment on entry to each function, and the offset to the
+ locals area. The offset to the local area is the offset from the stack
+ pointer on function entry to the first location where function data (local
+ variables, spill locations) can be stored.</p>
+ <p>The class also provides several functions for computing alignment and
+ offsets for various situations.</p>
+</div>
<!-- ======================================================================= -->
<div class="doc_subsection">
<a name="targetjitinfo">The <tt>TargetJITInfo</tt> class</a>