Difference between revisions of "DebugLLVM"
From NaplesPU Documentation
(Created page with "LLVM is provided with a debug infrastructure. If you want to debug the compiler, you only need to build LLVM and Clang in debug mode. == Typical errors == === Cannot select...") |
(→Cannot select) |
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=== Cannot select === | === Cannot select === | ||
| + | <syntaxhighlight lang="c" line='line'> | ||
fatal error: error in backend: Cannot select: | fatal error: error in backend: Cannot select: | ||
... | ... | ||
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In function: function name | In function: function name | ||
clang-3.9: error: clang frontend command failed with exit code 70 (use -v to see invocation) | clang-3.9: error: clang frontend command failed with exit code 70 (use -v to see invocation) | ||
| − | + | </syntaxhighlight> | |
This error occurs when the backend lacks a rule to perform the instruction selection of a certain SelectionDAG node. | This error occurs when the backend lacks a rule to perform the instruction selection of a certain SelectionDAG node. | ||
In such a case, you have a look at the [[NuPlusInstrFormats.td | NuPlusInstrFormats.td]], [[NuPlusInstrInfo.td | NuPlusInstrInfo.td]] and [[NuPlusISelLowering.cpp | NuPlusISelLowering.cpp]] files to understand why this node cannot be lowered. | In such a case, you have a look at the [[NuPlusInstrFormats.td | NuPlusInstrFormats.td]], [[NuPlusInstrInfo.td | NuPlusInstrInfo.td]] and [[NuPlusISelLowering.cpp | NuPlusISelLowering.cpp]] files to understand why this node cannot be lowered. | ||
Revision as of 19:29, 8 June 2018
LLVM is provided with a debug infrastructure. If you want to debug the compiler, you only need to build LLVM and Clang in debug mode.
Typical errors
Cannot select
fatal error: error in backend: Cannot select:
...
...
...
In function: function name
clang-3.9: error: clang frontend command failed with exit code 70 (use -v to see invocation)This error occurs when the backend lacks a rule to perform the instruction selection of a certain SelectionDAG node. In such a case, you have a look at the NuPlusInstrFormats.td, NuPlusInstrInfo.td and NuPlusISelLowering.cpp files to understand why this node cannot be lowered.
