This reverts commit r293196
Besides making things look nicer, ATM, we'd like to preserve analysis
more than we'd like to destroy the CFG. We'll probably revisit in the future
llvm-svn: 293501
The original shift is bigger, so this may qualify as 'obvious',
but here's an attempt at an Alive-based proof:
Name: exact
Pre: (C1 u< C2)
%a = shl i8 %x, C1
%b = lshr exact i8 %a, C2
=>
%c = lshr exact i8 %x, C2 - C1
%b = and i8 %c, ((1 << width(C1)) - 1) u>> C2
Optimization is correct!
llvm-svn: 293498
Original message:
Fix the values of two xcore ELF flags.
The values in llvm grew from a pre-MC day when they would not show up
in .o files and are outside of the SHF_MASKPROC.
Fortunately the MC output is not currently used as xcore has its own
assemble and that assembler uses valid values. This updates llvm to
use the same values as the xmos assembler.
llvm-svn: 293486
Different architectures can have different meaning for flags in the
SHF_MASKPROC mask, so we should always check what the architecture use
before checking the flag.
NFC for now, but will allow fixing the value of an xmos flag.
llvm-svn: 293484
Summary:
AMDGPU has two register classes with the same set of registers, and this
was causing this tablegen backend would get stuck in infinite recursion.
Reviewers: dsanders
Reviewed By: dsanders
Subscribers: tpr, wdng, llvm-commits
Differential Revision: https://reviews.llvm.org/D29049
llvm-svn: 293483
The values in llvm grew from a pre-MC day when they would not show up
in .o files and are outside of the SHF_MASKPROC.
Fortunately the MC output is not currently used as xcore has its own
assemble and that assembler uses valid values. This updates llvm to
use the same values as the xmos assembler.
llvm-svn: 293480
Summary: Change B type from double to pointer to double.
Reviewers: delena, sanjoy
Reviewed By: sanjoy
Subscribers: sanjoy, llvm-commits
Differential Revision: https://reviews.llvm.org/D29009
llvm-svn: 293467
By calling getScalarizationOverhead with the CallInst instead of the types of
its arguments, we make sure that only unique call arguments are added to the
scalarization cost.
getScalarizationOverhead() is extended to handle calls by only passing on the
actual call arguments (which is not all the operands).
This also eliminates a wrapper function with the same name.
review: Hal Finkel
llvm-svn: 293459
Previously this test case fired an assertion in getNode because we tried to create an insert_subvector with both input types the same size and the index pointing to half the vector width.
llvm-svn: 293446
The primary use of the dump() functions in LLVM is for use in a
debugger. Unfortunately lldb does not seem to handle default arguments
so using `p SomeMI.dump()` fails and you have to type the longer `p
SomeMI.dump(nullptr)`. Remove the paramter to make the most common use
easy. (You can always construct something like `p
SomeMI.print(dbgs(),MyTII)` if you need more features).
Differential Revision: https://reviews.llvm.org/D29241
llvm-svn: 293440
Replaces an xor+movd/movq with an xorps which will be shorter in codesize, avoid an int-fpu transfer, allow modern cores to fast path the result during decode and helps other combines recognise an all-zero vector.
The only reason I can think of that we'd want to keep scalar_to_vector in this case is to help recognise the upper elts are undef but this doesn't seem to be a problem.
Differential Revision: https://reviews.llvm.org/D29097
llvm-svn: 293438
While this probably should be considered a dump debugger utility, the C
API currently has no other ways to print a module to stderr for error
reporting purposes, so keep it even in release builds.
llvm-svn: 293436
Support lowering AEABI TLS access (__aeabi_read_tp) with long calls.
This requires adjusting the call sequence to use an indirect call to get
full addressability.
Resolves PR31769!
llvm-svn: 293433
PACKUSWB converts Signed word to Unsigned byte, (the same about DW) and it can't be used for umin+truncate pattern.
AVX-512 VPMOVUS* instructions fit the pattern since they convert Unsigned to Unsigned.
See https://llvm.org/bugs/show_bug.cgi?id=31773
Differential Revision: https://reviews.llvm.org/D29196
llvm-svn: 293431
