4 Commits

Author SHA1 Message Date
Fangrui Song
37f0c8df47 [X86] Emit @PLT for x86-64 and keep unadorned symbols for x86-32
This essentially reverts the x86-64 side effect of r327198.

For x86-32, @PLT (R_386_PLT32) is not suitable in -fno-pic mode so the
code forces MO_NO_FLAG (like a forced dso_local) (https://bugs.llvm.org//show_bug.cgi?id=36674#c6).

For x86-64, both `call/jmp foo` and `call/jmp foo@PLT` emit R_X86_64_PLT32
(https://sourceware.org/bugzilla/show_bug.cgi?id=22791) so there is no
difference using @PLT. Using @PLT is actually favorable because this drops
a difference with -fpie/-fpic code and makes it possible to avoid a canonical
PLT entry when taking the address of an undefined function symbol.
2020-12-05 13:17:47 -08:00
Guillaume Chatelet
d9bff3be99 Update tests for @llvm.memcpy.inline intrinsics 2020-01-28 10:32:43 +01:00
Guillaume Chatelet
5f87510c37 Fix failing bot 2020-01-28 10:20:55 +01:00
Guillaume Chatelet
879c825cb8 [instrinsics] Add @llvm.memcpy.inline instrinsics
Summary:
This is a follow up on D61634. It adds an LLVM IR intrinsic to allow better implementation of memcpy from C++.
A follow up CL will add the intrinsics in Clang.

Reviewers: courbet, theraven, t.p.northover, jdoerfert, tejohnson

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D71710
2020-01-28 09:42:01 +01:00