Previously single word would always return 0 regardless of the original sign. Multi word would return all 0s or all 1s based on the original sign. Now single word takes into account the sign as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301159 91177308-0d34-0410-b5e6-96231b3b80d8
The changes are causing the i686-mingw32 build to fail.
This reverts commit r301153, and the changes for a separate warning on i686-mingw32 in r301155 and r301156.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301157 91177308-0d34-0410-b5e6-96231b3b80d8
libraries are properly unloaded when llvm_shutdown is called.
Summary:
This was mostly affecting usage of the JIT, where storing the library handles in
a set made iteration unordered/undefined. This lead to disagreement between the
JIT and native code as to what the address and implementation of particularly on
Windows with stdlib functions:
JIT: putenv_s("TEST", "VALUE") // called msvcrt.dll, putenv_s
JIT: getenv("TEST") -> "VALUE" // called msvcrt.dll, getenv
Native: getenv("TEST") -> NULL // called ucrt.dll, getenv
Also fixed is the issue of DynamicLibrary::getPermanentLibrary(0,0) on Windows
not giving priority to the process' symbols as it did on Unix.
Reviewers: chapuni, v.g.vassilev, lhames
Reviewed By: lhames
Subscribers: danalbert, srhines, mgorny, vsk, llvm-commits
Differential Revision: https://reviews.llvm.org/D30107
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301153 91177308-0d34-0410-b5e6-96231b3b80d8
There are more bugs (runtime failures) triggered when partial
inlining is turned on. Add options to help triaging problems.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301148 91177308-0d34-0410-b5e6-96231b3b80d8
This change reboots SCEV's current (off by default) verification logic
to avoid false failures. Instead of stringifying trip counts, it maps
old and new trip counts to the same ScalarEvolution "universe" and
asks ScalarEvolution to compute the difference between them. If the
difference comes out to be a non-zero constant, then (barring some
corner cases) we *know* we messed up.
I've not yet enabled this by default since it hits an exponential time
issue in SCEV, but once I fix that, I'll flip it on by default in
EXPENSIVE_CHECKS builds.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301146 91177308-0d34-0410-b5e6-96231b3b80d8
We handled all of the commuted variants for plain xor already,
although they were scattered around and sometimes folded less
efficiently using distributive laws. We had no folds for not-xor.
Handling all of these patterns consistently is part of trying to
reinstate:
https://reviews.llvm.org/rL300977
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301144 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
In case all predecessor go to a single successor of current BB. We want to fold (not thread).
I failed to update the phi nodes properly in the last patch https://reviews.llvm.org/rL300657.
Phi nodes values are per predecessor in LLVM.
Reviewers: sanjoy
Reviewed By: sanjoy
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D32400
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This makes the WordBits calculation calculate a value between 1 and 64 for the number of bits in the last word. Previously if the BitWidth was a multiple of 64 bits the WordBits value was 0 and we had to bail out early to avoid an undefined shift. Now with a value of 64 we no longer have an undefined shift issue.
This shows a 15-16k reduction in the size of the opt binary on my local x86-64 build.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301134 91177308-0d34-0410-b5e6-96231b3b80d8
The current code is trying to be clever with shifts to avoid needing to clear unused bits. But it looks like the compiler is unable to optimize out the unused bit handling in the APInt constructor. Given this its better to just use SignExtend64 and have more readable code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301133 91177308-0d34-0410-b5e6-96231b3b80d8
There's probably some better way to write this that eliminates the
code duplication without hurting readability, but at least this
eliminates the logic holes and is hopefully slightly more efficient
than creating new instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301129 91177308-0d34-0410-b5e6-96231b3b80d8
1 out of the 4 tests commuted the operands, so there's an asymmetry
somewhere under this in how we handle these transforms.
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This reverts commit r301105, 4, 3 and 1, as a follow up of the previous
revert, which broke even more bots.
For reference:
Revert "[APInt] Use operator<<= where possible. NFC"
Revert "[APInt] Use operator<<= instead of shl where possible. NFC"
Revert "[APInt] Use ashInPlace where possible."
PR32754.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301111 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
D30400 has enabled tADC and tSBC instructions to be unglued, thereby allowing CPSR to remain live between Thumb1 scheduling units.
Most Thumb1 instructions have an OptionalDef for CPSR; but the scheduler ignored the OptionalDefs, and could unwittingly insert a flag-setting instruction in between an ADDS and the corresponding ADC.
Reviewers: javed.absar, atrick, MatzeB, t.p.northover, jmolloy, rengolin
Reviewed By: javed.absar
Subscribers: rogfer01, efriedma, aemerson, rengolin, llvm-commits, MatzeB
Differential Revision: https://reviews.llvm.org/D31081
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301106 91177308-0d34-0410-b5e6-96231b3b80d8
getRawData exposes the internal type of the APInt class directly to its users. Ideally we wouldn't expose such an implementation detail.
This patch fixes a few of the easy cases by using truncate, extract, or a rotate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301105 91177308-0d34-0410-b5e6-96231b3b80d8
... in the per-TU -O0 pipeline.
The problem is that there could be passes registered using
`addExtensionsToPM()` introducing unnamed globals.
Asan is an example, but there may be others. Building cppcheck
with `-flto=thin` and `-fsanitize=address` triggers an assertion
while we're reading bitcode (in lib/LTO), as the BitcodeReader
assumes there are no unnamed globals (because the namer has run).
Unfortunately I wasn't able to find an easy way to test this.
I added a comment in the hope nobody moves this again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301102 91177308-0d34-0410-b5e6-96231b3b80d8
For single word, shift by BitWidth was always returning 0, but for multiword it was based on original sign. Now single word matches multi word.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301094 91177308-0d34-0410-b5e6-96231b3b80d8
When the location description of a source variable involves arithmetic
on the value itself, it needs to be marked with DW_OP_stack_value since it
is not describing the variable's location, but rather its value.
This is a follow-up to r297971 and fixes the source testcase quoted in
the comment in debuginfo-dce.ll.
rdar://problem/30725338
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The unused upper bits are guaranteed to be 0 so we don't need to worry about accidentally counting them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301091 91177308-0d34-0410-b5e6-96231b3b80d8
The later uses of dyn_castNotVal in this block are either
incomplete (doesn't handle vector constants) or overstepping
(shouldn't handle constants at all), but this first use is
just unnecessary. 'I' is obviously not a constant, and it
can't be a not-of-a-not because that would already be
instsimplified.
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