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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
Ivan A. Kosarev 9b20c245ca [NEON] Define vfma_n_f32() and vfmaq_n_f32() intrinsics in AArch32 mode 
Differential Revision: https://reviews.llvm.org/D45670

llvm-svn: 330336
 2018-04-19 15:27:28 +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
Silviu Baranga 632fdc5919 PR27216: Only define __ARM_FEATURE_FMA when the target has VFPv4 
Summary:
According to the ACLE spec, "__ARM_FEATURE_FMA is defined to 1 if
the hardware floating-point architecture supports fused floating-point
multiply-accumulate".

This changes clang's behaviour from emitting this macro for v7-A and v7-R
cores to only emitting it when the target has VFPv4 (and therefore support
for the floating point multiply-accumulate instruction).

Fixes PR27216

Reviewers: t.p.northover, rengolin

Subscribers: aemerson, rengolin, cfe-commits

Differential Revision: http://reviews.llvm.org/D18963

llvm-svn: 267869
 2016-04-28 11:29:08 +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 bd7c169664 Fix recent test for more diverse environments. 
I think the main issue was the lack of -ffreestanding, which pulled in
the host's stdint.h. After that things went rapidly downhill.

llvm-svn: 172653
 2013-01-16 20:35:54 +00:00
Tim Northover 4ef746768b Correct order of operands forwarding NEON vfma to LLVM fma 
llvm-svn: 172650
 2013-01-16 20:13:15 +00:00