6dce2be1 | 26-Mar-2020 |
Dimitry Andric <dim@FreeBSD.org> |
Merge commit 459e8e948 from llvm git (by Justin Hibbits):
[PowerPC]: Don't allow r0 as a target for LD_GOT_TPREL_L/32
Summary: The linker is free to relax this (relocation R_PPC_GOT_TPREL16)
Merge commit 459e8e948 from llvm git (by Justin Hibbits):
[PowerPC]: Don't allow r0 as a target for LD_GOT_TPREL_L/32
Summary: The linker is free to relax this (relocation R_PPC_GOT_TPREL16) against R_PPC_TLS, if it sees fit (initial exec to local exec). If r0 is used, this can generate execution-invalid code (converts to 'addi %rX, %r0, FOO, which translates in PPC-lingo to li %rX, FOO). Forbid this instead.
This fixes static binaries using locales on FreeBSD/powerpc (tested on FreeBSD/powerpcspe).
Reviewed By: nemanjai Differential Revision: https://reviews.llvm.org/D76662
Requested by: jhibbits MFC after: 6 weeks X-MFC-With: 358851
show more ...
|
2b2a17f4 | 03-Jan-2020 |
Dimitry Andric <dim@FreeBSD.org> |
Merge commit d7be3eab5 from llvm git (by Luís Marques):
[RISCV] Handle fcopysign(f32, f64) and fcopysign(f64, f32)
Summary: Adds tablegen patterns to explicitly handle fcopysign where the ma
Merge commit d7be3eab5 from llvm git (by Luís Marques):
[RISCV] Handle fcopysign(f32, f64) and fcopysign(f64, f32)
Summary: Adds tablegen patterns to explicitly handle fcopysign where the magnitude and sign arguments have different types, due to the sign value casts being removed the by DAGCombiner. Support for RV32IF follows in a separate commit. Adds tests for all relevant scenarios except RV32IF.
Reviewers: lenary Reviewed By: lenary Tags: #llvm Differential Revision: https://reviews.llvm.org/D70678
This is a prerequisite for building and linking hard- and soft-float riscv worlds with clang and lld.
Requested by: jhb MFC after: 1 week X-MFC-With: r353358
show more ...
|
96d5330d | 03-Jan-2020 |
Dimitry Andric <dim@FreeBSD.org> |
Merge commit c6b09bff5 from llvm git (by Luís Marques):
[RISCV] Fix wrong CFI directives
Summary: Removes CFI CFA directives that could incorrectly propagate beyond the basic block they were
Merge commit c6b09bff5 from llvm git (by Luís Marques):
[RISCV] Fix wrong CFI directives
Summary: Removes CFI CFA directives that could incorrectly propagate beyond the basic block they were inteded for. Specifically it removes the epilogue CFI directives. See the branch_and_tail_call test for an example of the issue. Should fix the stack unwinding issues caused by the incorrect directives.
Reviewers: asb, lenary, shiva0217 Reviewed By: lenary Tags: #llvm Differential Revision: https://reviews.llvm.org/D69723
This is a prerequisite for building and linking hard- and soft-float riscv worlds with clang and lld.
Requested by: jhb MFC after: 1 week X-MFC-With: r353358
show more ...
|
5c72868c | 03-Jan-2020 |
Dimitry Andric <dim@FreeBSD.org> |
Merge commit da7b129b1 from llvm git (by James Clarke):
[RISCV] Don't force Local Exec TLS for non-PIC
Summary:
Forcing Local Exec TLS requires the use of copy relocations. Copy relocation
Merge commit da7b129b1 from llvm git (by James Clarke):
[RISCV] Don't force Local Exec TLS for non-PIC
Summary:
Forcing Local Exec TLS requires the use of copy relocations. Copy relocations need special handling in the runtime linker when being used against TLS symbols, which is present in glibc, but not in FreeBSD nor musl, and so cannot be relied upon. Moreover, copy relocations are a hack that embed the size of an object in the ABI when it otherwise wouldn't be, and break protected symbols (which are expected to be DSO local), whilst also wasting space, thus they should be avoided whenever possible. As discussed in D70398, RISC-V should move away from forcing Local Exec, and instead use Initial Exec like other targets, with possible linker relaxation to follow. The RISC-V GCC maintainers also intend to adopt this more-conventional behaviour (see https://github.com/riscv/riscv-elf-psabi-doc/issues/122).
Reviewers: asb, MaskRay
Reviewed By: MaskRay
Subscribers: emaste, krytarowski, hiraditya, rbar, johnrusso, simoncook, sabuasal, niosHD, kito-cheng, shiva0217, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, lenary, s.egerton, pzheng, sameer.abuasal, apazos, llvm-commits, bsdjhb
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D70649
This is a prerequisite for building and linking hard- and soft-float riscv worlds with clang and lld.
Requested by: jhb MFC after: 1 week X-MFC-With: r353358
show more ...
|