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| author | Josh Stone <jistone@redhat.com> | 2017-08-23 17:38:45 -0400 |
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| committer | Josh Stone <jistone@redhat.com> | 2017-09-01 18:21:29 -0700 |
| commit | a9bb599fb14fab9a9acee13c590b11a47c392cf6 (patch) | |
| tree | ef67f8dcbfb516516472802cabc7d81aed5b0c28 /src/rustllvm/RustWrapper.cpp | |
| parent | f861b6ee46465097eec266c160ac53e230df7cf0 (diff) | |
| download | rust-a9bb599fb14fab9a9acee13c590b11a47c392cf6.tar.gz rust-a9bb599fb14fab9a9acee13c590b11a47c392cf6.zip | |
powerpc64: improve extern struct ABI
These fixes all have to do with the 64-bit PowerPC ELF ABI for big-endian targets. The ELF v2 ABI for powerpc64le already worked well. - Return after marking return aggregates indirect. Fixes #42757. - Pass one-member float aggregates as direct argument values. - Aggregate arguments less than 64-bit must be written in the least- significant bits of the parameter space. - Larger aggregates are instead padded at the tail. (i.e. filling MSBs, padding the remaining LSBs.) New tests were also added for the single-float aggregate, and a 3-byte aggregate to check that it's filled into LSBs. Overall, at least these formerly-failing tests now pass on powerpc64: - run-make/extern-fn-struct-passing-abi - run-make/extern-fn-with-packed-struct - run-pass/extern-pass-TwoU16s.rs - run-pass/extern-pass-TwoU8s.rs - run-pass/struct-return.rs
Diffstat (limited to 'src/rustllvm/RustWrapper.cpp')
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