[all-commits] [llvm/llvm-project] 069ecd: [ARM] Check target feature support for __builtin_a...
Fangrui Song via All-commits
all-commits at lists.llvm.org
Wed Sep 21 11:50:31 PDT 2022
Branch: refs/heads/main
Home: https://github.com/llvm/llvm-project
Commit: 069ecd0c6e2c9d5c457159d7326f31cba174e47c
https://github.com/llvm/llvm-project/commit/069ecd0c6e2c9d5c457159d7326f31cba174e47c
Author: Fangrui Song <i at maskray.me>
Date: 2022-09-21 (Wed, 21 Sep 2022)
Changed paths:
M clang/include/clang/Basic/BuiltinsARM.def
M clang/lib/Basic/Targets/ARM.cpp
M clang/test/CodeGen/arm-crc32.c
Log Message:
-----------
[ARM] Check target feature support for __builtin_arm_crc*
`__builtin_arm_crc*` requires the target feature crc which is available on armv8
and above. Calling the fuctions for armv7 leads to a SelectionDAG crash.
```
% clang -c --target=armv7-unknown-linux-gnueabi -c a.c
fatal error: error in backend: Cannot select: intrinsic %llvm.arm.crc32b
PLEASE submit a bug report to ...
```
Add `TARGET_BUILTIN` and define required features for these builtins to
report an error in `CodeGenFunction::checkTargetFeatures`. The problem is quite widespread.
I will add `TARGET_BUILTIN` for more builtins later.
Fix https://github.com/llvm/llvm-project/issues/57802
Differential Revision: https://reviews.llvm.org/D134127
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