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| author | Eric Christopher <echristo@apple.com> | 2012-03-23 05:50:46 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@apple.com> | 2012-03-23 05:50:46 +0000 |
| commit | a443e5b1f1013612950fc3c9ebfafca60a1c20df (patch) | |
| tree | c545f5c40915d4440006058147e804f9accfbf19 /docs/ExtendingLLVM.html | |
| parent | fe3956ffa48eabad73e96f45df5cb7d4f03c318e (diff) | |
Remove the C backend.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153307 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/ExtendingLLVM.html')
| -rw-r--r-- | docs/ExtendingLLVM.html | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/docs/ExtendingLLVM.html b/docs/ExtendingLLVM.html index ca8d3e990b..f8ba19545b 100644 --- a/docs/ExtendingLLVM.html +++ b/docs/ExtendingLLVM.html @@ -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> |