[Bug]: __attribute__((preserve_all)) crashes on aarch64 #1988
Description
Description
Compiling the following source and clang will crash with Unsupported calling convention..
Source:
// test.c
__attribute__((preserve_all)) float bar(float a);
float run(float foo) {
return bar(foo);
}Repro:
r26/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android34-clang -c test.c -O2
Crash log:
fatal error: error in backend: Unsupported calling convention.
clang-17: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Android (10552028, +pgo, +bolt, +lto, -mlgo, based on r487747d) clang version 17.0.2 (https://android.googlesource.com/toolchain/llvm-project d9f89f4d16663d5012e5c09495f3b30ece3d2362)
Target: aarch64-unknown-linux-android24
Thread model: posix
InstalledDir: /home/builder/lib/android-ndk-r26b/toolchains/llvm/prebuilt/linux-x86_64/bin
clang-17: note: diagnostic msg:
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PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-17: note: diagnostic msg: /tmp/main-538331.c
clang-17: note: diagnostic msg: /tmp/main-538331.sh
clang-17: note: diagnostic msg:
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Upstream bug
Commit to cherry-pick
Affected versions
r26
Canary version
No response
Host OS
Linux
Host OS version
Ubuntu 22.04
Affected ABIs
arm64-v8a