Summary:
Added a test case just to make sure that isKnownNonZero() returns false
when we cannot guarantee that a ConstantExpr is a non-zero constant.
Reviewers: sanjoy, majnemer, mcrosier, nlewycky
Subscribers: nlewycky, mssimpso, mcrosier, llvm-commits
Differential Revision: http://reviews.llvm.org/D16908
llvm-svn: 260544
Summary:
When a PHI is used only to be compared with zero, it is possible to replace an
incoming value with any non-zero constant if the incoming value can be proved as
a known nonzero value. For example, in below code, we can replace the incoming value %v with
any non-zero constant based on the fact that the PHI is only used to be compared with zero
and %v is a known non-zero value:
%v = select %cond, 1, 2
%p = phi [%v, BB] ...
%c = icmp eq, %p, 0
Reviewers: mcrosier, jmolloy, sanjoy
Subscribers: hfinkel, mcrosier, majnemer, llvm-commits, haicheng, bmakam, mssimpso, gberry
Differential Revision: http://reviews.llvm.org/D16240
llvm-svn: 260530
If a class has hidden visibility all derived classes and all classes
that have it as a member must have hidden visibility too. That may
be fixable here but requires changes to quite a lot of debug info
classes.
This is also one of the things that GCC enforces aggressively while
clang ignores it, making testing more annoying than necessary.
llvm-svn: 260529
This patch allows the mixing of scaled and unscaled load/stores to form
load/store pairs.
This is a reapplication of r259812, which had an incorrect assert. The
test_stur_str_no_assert() test is a reduced version of the issue hit in
the AArch64 self-host.
PR24465
llvm-svn: 260523
Summary:
Fixed an issue for mips with an instruction such as 'sdc1 $f1, 272 +8(a0)' which has a space between '272' and '+'. The parser would then parse '272' and '+8' as two arguments instead of a single expression resulting in one too many arguments in the pseudo instruction.
The reason that the test case has been changed is so that the expected
output matches the output of the GNU assembler.
Reviewers: vkalintiris, dsanders
Subscribers: dsanders, llvm-commits
Differential Revision: http://reviews.llvm.org/D13592
llvm-svn: 260521
This is a part of the refactoring to unify isSafeToLoadUnconditionally and isDereferenceablePointer functions. In the subsequent change isSafeToSpeculativelyExecute will be modified to use isSafeToLoadUnconditionally instead of isDereferenceableAndAlignedPointer.
Reviewed By: reames
Differential Revision: http://reviews.llvm.org/D16227
llvm-svn: 260520
If the two operands to an instruction were both
subregisters of the same super register, it would incorrectly
think this counted as the same constant bus use.
This fixes the verifier error in fmin_legacy.ll which
was missing -verify-machineinstrs.
llvm-svn: 260495
This adds support for finding the dynamic table and dynamic symbol table via
the section table or the program header table. If there's no section table an
attempt is made to figure out the length of the dynamic symbol table.
llvm-svn: 260488
Separate methods to convert parsed instructions to MCInst:
- VOP3 only instructions (always create modifiers as operands in MCInst)
- VOP2 instrunctions with modifiers (create modifiers as operands
in MCInst when e64 encoding is forced or modifiers are parsed)
- VOP2 instructions without modifiers (do not create modifiers
as operands in MCInst)
- Add VOP3Only flag. Pass HasMods flag to VOP3Common.
- Simplify code that deals with modifiers (-1 is now same as
0). This is no longer needed.
- Add few tests (more will be added separately).
Update error message now correct.
Patch By: Nikolay Haustov
Differential Revision: http://reviews.llvm.org/D16778
llvm-svn: 260483
For now, generic virtual registers will not have a register class. We may want
to change that. For instance, if we want to use all the methods from
TargetRegisterInfo with generic virtual registers, we need to either have some
sort of generic register classes that do what we want, or teach those methods
how to deal with nullptr register class.
Although the latter seems easy enough to do, we may still want to differenciate
generic register classes from nullptr to catch cases where nullptr gets
introduced by a bug of some sort.
Anyway, I will file a PR to keep track of that.
llvm-svn: 260474
Make sure we split ":" from the end of the global function id (which
is <path>:<function> for local functions) instead of the beginning to
avoid splitting at the wrong place for Windows file paths that contain
a ":".
llvm-svn: 260469
The current function importer will walk the callgraph, importing
transitively any callee that is below the threshold. This can
lead to import very deep which is costly in compile time and not
necessarily beneficial as most of the inline would happen in
imported function and not necessarilly in user code.
The actual factor has been carefully chosen by flipping a coin ;)
Some tuning need to be done (just at the existing limiting threshold).
Reviewers: tejohnson
Differential Revision: http://reviews.llvm.org/D17082
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 260466
There is not reason to pass an array of "char *" to rebuild a set if
the client already has one.
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 260462
Summary:
Just like the existing find_as() method, the new insert_as() accepts
an extra parameter which is used as a key to find the bucket in the
map.
When creating a Constant, we want to check the map before actually
creating the object. In this case we have to perform two queries to
the map, and this extra parameter can save recomputing the hash value
for the second query.
Reviewers: dexonsmith, chandlerc
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D16268
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 260458
