The tool reports verbose output for the DWARF debug location coverage.
The llvm-locstats for each variable or formal parameter DIE computes what
percentage from the code section bytes, where it is in scope, it has
location description. The line 0 shows the number (and the percentage) of
DIEs with no location information, but the line 100 shows the number (and
the percentage) of DIEs where there is location information in all code
section bytes (where the variable or parameter is in the scope). The line
50..59 shows the number (and the percentage) of DIEs where the location
information is in between 50 and 59 percentage of its scope covered.
Differential Revision: https://reviews.llvm.org/D66526
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@373183 91177308-0d34-0410-b5e6-96231b3b80d8
Moves existing article links on the Programming, Subsystem, and Reference documentation pages to new locations. Also moves Github Repository and Publications links to the sidebar.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@373169 91177308-0d34-0410-b5e6-96231b3b80d8
Adds a section to the User Guides page for articles related to building, packaging, and distributing LLVM. Includes sub-sections for CMake, Clang, and Docker.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@373113 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The list of indirect labels should ALWAYS have their blockaddresses as
argument operands to the callbr (but not necessarily the other way
around). Add an invariant that checks this.
The verifier catches a bad test case that was added recently in r368478.
I think that was a simple mistake, and the test was made less strict in
regards to the precise addresses (as those weren't specifically the
point of the test).
This invariant will be used to find a reported bug.
Link: https://www.spinics.net/lists/arm-kernel/msg753473.html
Link: https://github.com/ClangBuiltLinux/linux/issues/649
Reviewers: craig.topper, void, chandlerc
Reviewed By: void
Subscribers: ychen, lebedev.ri, javed.absar, kristof.beyls, hiraditya, llvm-commits, srhines
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D67196
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372923 91177308-0d34-0410-b5e6-96231b3b80d8
During the review of D67434, it was recommended to make fmuladd's
behavior more explicit. D67434 depends on this interpretation.
Reviewers: efriedma, jfb, reames, scanon, lebedev.ri, spatel
Reviewed By: spatel
Differential Revision: https://reviews.llvm.org/D67552
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372892 91177308-0d34-0410-b5e6-96231b3b80d8
The changes here are based on the corresponding diffs for allowing FMF on 'select':
D61917 <https://reviews.llvm.org/D61917>
As discussed there, we want to have fast-math-flags be a property of an FP value
because the alternative (having them on things like fcmp) leads to logical
inconsistency such as:
https://bugs.llvm.org/show_bug.cgi?id=38086
The earlier patch for select made almost no practical difference because most
unoptimized conditional code begins life as a phi (based on what I see in clang).
Similarly, I don't expect this patch to do much on its own either because
SimplifyCFG promptly drops the flags when converting to select on a minimal
example like:
https://bugs.llvm.org/show_bug.cgi?id=39535
But once we have this plumbing in place, we should be able to wire up the FMF
propagation and start solving cases like that.
The change to RecurrenceDescriptor::AddReductionVar() is required to prevent a
regression in a LoopVectorize test. We are intersecting the FMF of any
FPMathOperator there, so if a phi is not properly annotated, new math
instructions may not be either. Once we fix the propagation in SimplifyCFG, it
may be safe to remove that hack.
Differential Revision: https://reviews.llvm.org/D67564
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372878 91177308-0d34-0410-b5e6-96231b3b80d8
The changes here are based on the corresponding diffs for allowing FMF on 'select':
D61917
As discussed there, we want to have fast-math-flags be a property of an FP value
because the alternative (having them on things like fcmp) leads to logical
inconsistency such as:
https://bugs.llvm.org/show_bug.cgi?id=38086
The earlier patch for select made almost no practical difference because most
unoptimized conditional code begins life as a phi (based on what I see in clang).
Similarly, I don't expect this patch to do much on its own either because
SimplifyCFG promptly drops the flags when converting to select on a minimal
example like:
https://bugs.llvm.org/show_bug.cgi?id=39535
But once we have this plumbing in place, we should be able to wire up the FMF
propagation and start solving cases like that.
The change to RecurrenceDescriptor::AddReductionVar() is required to prevent a
regression in a LoopVectorize test. We are intersecting the FMF of any
FPMathOperator there, so if a phi is not properly annotated, new math
instructions may not be either. Once we fix the propagation in SimplifyCFG, it
may be safe to remove that hack.
Differential Revision: https://reviews.llvm.org/D67564
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372866 91177308-0d34-0410-b5e6-96231b3b80d8
The --bytes option uses the phrase "printable ASCII characters", but the
description section used simply "printable characters". To avoid any
confusion about locale impacts etc, this change adopts the former's
phrasing in both places. It also fixes a minor grammar issue in the
description.
Reviewed by: MaskRay
Differential Revision: https://reviews.llvm.org/D68016
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372865 91177308-0d34-0410-b5e6-96231b3b80d8
Main changes are mostly wording of some options, but this change also
fixes a switch reference so that a link is created and moves
--strip-sections into the ELF-specific area since it is only supported
for ELF currently.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372864 91177308-0d34-0410-b5e6-96231b3b80d8
Summary of changes:
- Updated to reflect recent changes in assembler;
- Minor bugfixing and improvements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372857 91177308-0d34-0410-b5e6-96231b3b80d8
The tool reports verbose output for the DWARF debug location coverage.
The llvm-locstats for each variable or formal parameter DIE computes what
percentage from the code section bytes, where it is in scope, it has
location description. The line 0 shows the number (and the percentage) of
DIEs with no location information, but the line 100 shows the number (and
the percentage) of DIEs where there is location information in all code
section bytes (where the variable or parameter is in the scope). The line
50..59 shows the number (and the percentage) of DIEs where the location
information is in between 50 and 59 percentage of its scope covered.
Differential Revision: https://reviews.llvm.org/D66526
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372554 91177308-0d34-0410-b5e6-96231b3b80d8
Adds a new page for existing Getting Involved, Development Process, and Community Proposals articles. Also moves Mailing Lists, Meetups and social events, and IRC sections.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372487 91177308-0d34-0410-b5e6-96231b3b80d8
Adds additional links to sidebar. Also removes Glossary and FAQ from LLVM Design & Overview section. (These links now reside on the sidebar.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372469 91177308-0d34-0410-b5e6-96231b3b80d8
Adds a custom sidebar to LLVM docs. Sidebar includes links to How to submit a bug and FAQ topics, as well as a Show Source link and search box.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372432 91177308-0d34-0410-b5e6-96231b3b80d8
This commit moves several topics to new categories. It also removes a few duplicate links in Subsystem Documentation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372274 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This is the first patch in a series of patches that will implement data dependence graph in LLVM. Many of the ideas used in this implementation are based on the following paper:
D. J. Kuck, R. H. Kuhn, D. A. Padua, B. Leasure, and M. Wolfe (1981). DEPENDENCE GRAPHS AND COMPILER OPTIMIZATIONS.
This patch contains support for a basic DDGs containing only atomic nodes (one node for each instruction). The edges are two fold: def-use edges and memory-dependence edges.
The implementation takes a list of basic-blocks and only considers dependencies among instructions in those basic blocks. Any dependencies coming into or going out of instructions that do not belong to those basic blocks are ignored.
The algorithm for building the graph involves the following steps in order:
1. For each instruction in the range of basic blocks to consider, create an atomic node in the resulting graph.
2. For each node in the graph establish def-use edges to/from other nodes in the graph.
3. For each pair of nodes containing memory instruction(s) create memory edges between them. This part of the algorithm goes through the instructions in lexicographical order and creates edges in reverse order if the sink of the dependence occurs before the source of it.
Authored By: bmahjour
Reviewer: Meinersbur, fhahn, myhsu, xtian, dmgreen, kbarton, jdoerfert
Reviewed By: Meinersbur, fhahn, myhsu
Subscribers: ychen, arphaman, simoll, a.elovikov, mgorny, hiraditya, jfb, wuzish, llvm-commits, jsji, Whitney, etiotto
Tag: #llvm
Differential Revision: https://reviews.llvm.org/D65350
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372238 91177308-0d34-0410-b5e6-96231b3b80d8
Fix the warning.
Bugpoint.rst:124:Mismatch: both interpreted text role prefix and
reference suffix.
Note that the line no here is wrong and misleading,
the problem is in line 128, not 124.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372181 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This is the first patch in a series of patches that will implement data dependence graph in LLVM. Many of the ideas used in this implementation are based on the following paper:
D. J. Kuck, R. H. Kuhn, D. A. Padua, B. Leasure, and M. Wolfe (1981). DEPENDENCE GRAPHS AND COMPILER OPTIMIZATIONS.
This patch contains support for a basic DDGs containing only atomic nodes (one node for each instruction). The edges are two fold: def-use edges and memory-dependence edges.
The implementation takes a list of basic-blocks and only considers dependencies among instructions in those basic blocks. Any dependencies coming into or going out of instructions that do not belong to those basic blocks are ignored.
The algorithm for building the graph involves the following steps in order:
1. For each instruction in the range of basic blocks to consider, create an atomic node in the resulting graph.
2. For each node in the graph establish def-use edges to/from other nodes in the graph.
3. For each pair of nodes containing memory instruction(s) create memory edges between them. This part of the algorithm goes through the instructions in lexicographical order and creates edges in reverse order if the sink of the dependence occurs before the source of it.
Authored By: bmahjour
Reviewer: Meinersbur, fhahn, myhsu, xtian, dmgreen, kbarton, jdoerfert
Reviewed By: Meinersbur, fhahn, myhsu
Subscribers: ychen, arphaman, simoll, a.elovikov, mgorny, hiraditya, jfb, wuzish, llvm-commits, jsji, Whitney, etiotto
Tag: #llvm
Differential Revision: https://reviews.llvm.org/D65350
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372162 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
When reducing case for a CodeGenCrash, bugpoint may generate a new
reduced
testcase that exposes/causes another crash or break something due to
limitation.
Bugpoint does not distiguish different crashes currently,
so when this happens, bugpoint will go on reducing for the new crash,
or just abort, we can't get the case reduced for the origial crash.
An advice is added into usage doc to connect to recommend checking error
message with scripts and `-compile-command`.
Reviewers: modocache, bogner, sebpop, reames, vsk, MatzeB
Reviewed By: vsk
Subscribers: mehdi_amini, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66832
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372157 91177308-0d34-0410-b5e6-96231b3b80d8
Follow-up to r371983. Referring to "this program" in the description of
the --version option in the documentation isn't exactly correct, because
the docs are not part of the program, and so "this program" doesn't
really refer to anything. This patch brings the other users of this
terminology into line with the new updates to llvm-size and
llvm-strings.
Reviewed by: alexshap, MaskRay
Differential Revision: https://reviews.llvm.org/D67618
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372107 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Adds the following inline asm constraints for SVE:
- Upl: One of the low eight SVE predicate registers, P0 to P7 inclusive
- Upa: SVE predicate register with full range, P0 to P15
Reviewers: t.p.northover, sdesmalen, rovka, momchil.velikov, cameron.mcinally, greened, rengolin
Reviewed By: rovka
Subscribers: javed.absar, tschuett, rkruppe, psnobl, cfe-commits, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66524
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371967 91177308-0d34-0410-b5e6-96231b3b80d8
GNU objcopy documents that -B is only useful with architecture-less
input (i.e. "binary" or "ihex"). After D67144, -O defaults to -I, and
-B is essentially a NOP.
* If -O is binary/ihex, GNU objcopy ignores -B.
* If -O is elf*, -B provides the e_machine field in GNU objcopy.
So to convert a blob to an ELF, `-I binary -B i386:x86-64 -O elf64-x86-64` has to be specified.
`-I binary -B i386:x86-64 -O elf64-x86-64` creates an ELF with its
e_machine field set to EM_NONE in GNU objcopy, but a regular x86_64 ELF
in elftoolchain elfcopy. Follow the elftoolchain approach (ignoring -B)
to simplify code. Users that expect their command line portable should
specify -B.
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D67215
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371914 91177308-0d34-0410-b5e6-96231b3b80d8
llvm-readobj's document was missing --stack-sizes entirely from its
document, so this patch adds it. It also adds a note to the llvm-readelf
description that the switch is only implemented for GNU style output
currently. For reference, --stack-sizes was added in r367942.
Reviewed by: MaskRay
Differential Revision: https://reviews.llvm.org/D67548
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371862 91177308-0d34-0410-b5e6-96231b3b80d8
Behaviour was recently added to this switch to strip debug sections too.
See r369761.
This change also makes the description for the --strip-unneeded switch
consistent between the two docs.
Reviewed by: MaskRay
Differential Revision: https://reviews.llvm.org/D67546
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371855 91177308-0d34-0410-b5e6-96231b3b80d8
Djordje Todorovic