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Author SHA1 Message Date
Fangrui Song dbc96b518b Revert "[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition" 
This reverts commit 789a46f2d7.

Accidentally committed.
 2020-02-03 10:09:39 -08:00
Fangrui Song 789a46f2d7 [CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition 
Summary:
Clang -fpic defaults to -fno-semantic-interposition (GCC -fpic defaults
to -fsemantic-interposition).
Users need to specify -fsemantic-interposition to get semantic
interposition behavior.

Semantic interposition is currently a best-effort feature. There may
still be some cases where it is not handled well.

Reviewers: peter.smith, rnk, serge-sans-paille, sfertile, jfb, jdoerfert

Subscribers: dschuff, jyknight, dylanmckay, nemanjai, jvesely, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, arphaman, PkmX, jocewei, jsji, Jim, lenary, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D73865
 2020-02-03 09:52:48 -08:00
Craig Topper 3113ec3dc7 [CodeGen] Update min-legal-vector width based on function argument and return types 
This is a continuation of my patches to inform the X86 backend about what the largest IR types are in the function so that we can restrict the backend type legalizer to prevent 512-bit vectors on SKX when -mprefer-vector-width=256 is specified if no explicit 512 bit vectors were specified by the user.

This patch updates the vector width based on the argument and return types of the current function and from the types of any functions it calls. This is intended to make sure the backend type legalizer doesn't disturb any types that are required for ABI.

Differential Revision: https://reviews.llvm.org/D52441

llvm-svn: 345168
 2018-10-24 17:42:17 +00:00
Mehdi Amini 6aa9e9b41a IRGen: Add optnone attribute on function during O0 
Amongst other, this will help LTO to correctly handle/honor files
compiled with O0, helping debugging failures.
It also seems in line with how we handle other options, like how
-fnoinline adds the appropriate attribute as well.

Differential Revision: https://reviews.llvm.org/D28404

llvm-svn: 304127
 2017-05-29 05:38:20 +00:00
David Majnemer 12b9e76b62 Update for LLVM changes 
InstSimplify has gained the ability to remove needless bitcasts which
perturbed some clang codegen tests.

llvm-svn: 276728
 2016-07-26 05:52:37 +00:00
Tim Northover 58672974a9 ARM & AArch64: convert asm tests to LLVM IR and restrict optimizations. 
This is mostly a one-time autoconversion of tests that checked assembly after
"-Owhatever" compiles to only run "opt -mem2reg" and check the assembly. This
should make them much more stable to changes in LLVM so they won't break on
unrelated changes.

"opt -mem2reg" is a compromise designed to increase the readability of tests
that check dataflow, while minimizing dependency on LLVM. Hopefully mem2reg is
stable enough that no surpises will come along.

Should address http://llvm.org/PR26815.

llvm-svn: 263048
 2016-03-09 18:54:42 +00:00
Tim Northover 831d728f9a AArch64: re-enable tests that were looking for a non-existent backend. 
In the final phase of the merge, I managed to disable a bunch of Clang
tests accidentally. Fortunately none of them seem to have broken in
the interim.

llvm-svn: 211149
 2014-06-18 08:37:28 +00:00
Tim Northover 25e8a6754e AArch64/ARM64: update Clang after AArch64 removal. 
A few (mostly CodeGen) parts of Clang were tightly coupled to the
AArch64 backend. Now that it's gone, they will not even compile.

I've also deduplicated RUN lines in many of the AArch64 tests. This
might improve "make check-all" time noticably: some of those NEON
tests were monsters.

llvm-svn: 209578
 2014-05-24 12:51:25 +00:00
James Molloy 75f5f9e629 [ARM64] Allow the disabling of NEON and crypto instructions. Update tests to pass -target-feature +neon. 
llvm-svn: 206394
 2014-04-16 15:33:48 +00:00
Tim Northover a2ee433c8d ARM64: initial clang support commit. 
This adds Clang support for the ARM64 backend. There are definitely
still some rough edges, so please bring up any issues you see with
this patch.

As with the LLVM commit though, we think it'll be more useful for
merging with AArch64 from within the tree.

llvm-svn: 205100
 2014-03-29 15:09:45 +00:00
Tim Northover 926a235fea AArch64: convert NEON tests to use CHECK-LABEL. 
llvm-svn: 202703
 2014-03-03 11:34:36 +00:00
Jiangning Liu b96ebac02b Implement aarch64 neon instruction set AdvSIMD (Across). 
llvm-svn: 192029
 2013-10-05 08:22:55 +00:00