[ARM] Check target feature support for __builtin_arm_crc*
authorFangrui Song <i@maskray.me>
Wed, 21 Sep 2022 18:50:15 +0000 (11:50 -0700)
committerFangrui Song <i@maskray.me>
Wed, 21 Sep 2022 18:50:15 +0000 (11:50 -0700)
commit069ecd0c6e2c9d5c457159d7326f31cba174e47c
tree1855d07fb6b4102ca6356ffa2cddfc190eab61d1
parent552539bdaccc187ce1781f579a8076e4c917fa28
[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
clang/include/clang/Basic/BuiltinsARM.def
clang/lib/Basic/Targets/ARM.cpp
clang/test/CodeGen/arm-crc32.c