This adds a combine for extract(x, n); extract(x, n+1) ->
VMOVRRD(extract x, n/2). This allows two vector lanes to be moved at the
same time in a single instruction, and thanks to the other VMOVRRD folds
we have added recently can help reduce the amount of executed
instructions. Floating point types are very similar, but will include a
bitcast to an integer type.
This also adds a shouldRewriteCopySrc, to prevent copy propagation from
DPR to SPR, which can break as not all DPR regs can be extracted from
directly. Otherwise the machine verifier is unhappy.
Differential Revision: https://reviews.llvm.org/D100244
- Basically iterate each pair of memory operands from both instructions
and return true if any of them may alias.
- The exception are memory instructions without any memory operand. They
may touch everything and could alias to any memory instruction.
Differential Revision: https://reviews.llvm.org/D89447
This temporarily reverts commit 7019cea26d.
It seems that, for some targets, there are instructions with a lot of memory operands (probably more than would be expected). This causes a lot of buildbots to timeout and notify failed builds. While investigations are ongoing to find out why this happens, revert the changes.
Summary:
To support all targets, the mayAlias member function needs to support instructions with multiple operands.
This revision also changes the order of the emitted instructions in some test cases.
Reviewers: efriedma, hfinkel, craig.topper, dmgreen
Reviewed By: efriedma
Subscribers: MatzeB, dmgreen, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D80161
Currently when the target is big-endian vmov.i64 reverses the order of the two
words of the vector. This is correct only when the underlying element type is
32-bit, as actually what it should be doing is considering it a vector of the
underlying type and reversing the elements of that.
Differential Revision: https://reviews.llvm.org/D76515
Printing floating point number in decimal is inconvenient for humans.
Verbose asm output will print out floating point values in comments, it
helps.
But in lots of cases, users still need additional work to covert the
decimal back to hex or binary to check the bit patterns,
especially when there are small precision difference.
Hexadecimal form is one of the supported form in LLVM IR, and easier for
debugging.
This patch try to print all FP constant in hex form instead.
Reviewed By: RKSimon
Differential Revision: https://reviews.llvm.org/D73566
Summary:
This patch adds some basic operations for fp16
vectors, such as bitcast from fp16 to i16,
required to perform extract_subvector (also added
here) and extract_element.
Reviewers: SjoerdMeijer, DavidSpickett, t.p.northover, ostannard
Reviewed By: ostannard
Subscribers: javed.absar, kristof.beyls, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D60618
llvm-svn: 359433
David Green