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Remove the C backend.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153307 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2012-03-23 05:50:46 +00:00
parent fe3956ffa4
commit a443e5b1f1
23 changed files with 15 additions and 4028 deletions
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13
docs/ExtendingLLVM.html
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@@ -105,19 +105,6 @@ function and then be turned into an instruction if warranted.</p>
support for it. Generally you must do the following steps:</p>
<dl>
<dt>Add support to the C backend in <tt>lib/Target/CBackend/</tt></dt>
<dd>Depending on the intrinsic, there are a few ways to implement this. For
most intrinsics, it makes sense to add code to lower your intrinsic in
<tt>LowerIntrinsicCall</tt> in <tt>lib/CodeGen/IntrinsicLowering.cpp</tt>.
Second, if it makes sense to lower the intrinsic to an expanded sequence of
C code in all cases, just emit the expansion in <tt>visitCallInst</tt> in
<tt>Writer.cpp</tt>. If the intrinsic has some way to express it with GCC
(or any other compiler) extensions, it can be conditionally supported based
on the compiler compiling the CBE output (see <tt>llvm.prefetch</tt> for an
example). Third, if the intrinsic really has no way to be lowered, just
have the code generator emit code that prints an error message and calls
abort if executed.</dd>
<dt>Add support to the .td file for the target(s) of your choice in
<tt>lib/Target/*/*.td</tt>.</dt>

2
docs/GettingStarted.html
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@@ -1389,7 +1389,7 @@ different <a href="#tools">tools</a>.</p>
<dd> This directory contains files that describe various target architectures
for code generation. For example, the <tt>llvm/lib/Target/X86</tt>
directory holds the X86 machine description while
<tt>llvm/lib/Target/CBackend</tt> implements the LLVM-to-C converter.</dd>
<tt>llvm/lib/Target/ARM</tt> implements the ARM backend.</dd>
<dt><tt><b>llvm/lib/CodeGen/</b></tt></dt>
<dd> This directory contains the major parts of the code generator: Instruction