Summary:
After this change, deopt operand bundles can be lowered directly by
SelectionDAG into STATEPOINT instructions (which are then lowered to a
call or sequence of nop, with an associated __llvm_stackmaps entry0.
This obviates the need to round-trip deoptimization state through
gc.statepoint via RewriteStatepointsForGC.
Reviewers: reames, atrick, majnemer, JosephTremoulet, pgavlin
Subscribers: sanjoy, mcrosier, majnemer, llvm-commits
Differential Revision: http://reviews.llvm.org/D18257
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264015 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Without tree pruning clang has 2,667,552 points.
Wiht only dominators pruning: 1,515,586.
With both dominators & predominators pruning: 1,340,534.
Resubmit of r262103.
Differential Revision: http://reviews.llvm.org/D18341
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264003 91177308-0d34-0410-b5e6-96231b3b80d8
If we have a BB with only MemoryDefs, live-in calculations will ignore
it. This means we get results like this:
define void @foo(i8* %p) {
; 1 = MemoryDef(liveOnEntry)
store i8 0, i8* %p
br i1 undef, label %if.then, label %if.end
if.then:
; 2 = MemoryDef(1)
store i8 1, i8* %p
br label %if.end
if.end:
; 3 = MemoryDef(1)
store i8 2, i8* %p
ret void
}
...When there should be a MemoryPhi in the `if.end` BB.
This patch fixes that behavior.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263991 91177308-0d34-0410-b5e6-96231b3b80d8
I added -march=hexagon to force using Hexagon target when testing
locally, and I forgot to take it out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263990 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Whole quad mode is already enabled for pixel shaders that compute
derivatives, but it must be suspended for instructions that cause a
shader to have side effects (i.e. stores and atomics).
This pass addresses the issue by storing the real (initial) live mask
in a register, masking EXEC before instructions that require exact
execution and (re-)enabling WQM where required.
This pass is run before register coalescing so that we can use
machine SSA for analysis.
The changes in this patch expose a problem with the second machine
scheduling pass: target independent instructions like COPY implicitly
use EXEC when they operate on VGPRs, but this fact is not encoded in
the MIR. This can lead to miscompilation because instructions are
moved past changes to EXEC.
This patch fixes the problem by adding use-implicit operands to
target independent instructions. Some general codegen passes are
relaxed to work with such implicit use operands.
Reviewers: arsenm, tstellarAMD, mareko
Subscribers: MatzeB, arsenm, llvm-commits
Differential Revision: http://reviews.llvm.org/D18162
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263982 91177308-0d34-0410-b5e6-96231b3b80d8
- R10 and R11 are not reserved registers.
- Check for reserved registers when finding unused caller-saved registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263977 91177308-0d34-0410-b5e6-96231b3b80d8
In executable and shared object ELF files, relocations in the file contain the final virtual address rather than section offset so this is adjusted to display section offset.
Differential revision: http://reviews.llvm.org/D15965
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263971 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
When control flow is implemented using the exec mask, the compiler will
insert branch instructions to skip over the masked section when exec is
zero if the section contains more than a certain number of instructions.
The previous code would only count instructions in successor blocks,
and this patch modifies the code to start counting instructions in all
blocks between the start and end of the branch.
Reviewers: nhaehnle, arsenm
Subscribers: arsenm, llvm-commits
Differential Revision: http://reviews.llvm.org/D18282
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263969 91177308-0d34-0410-b5e6-96231b3b80d8
This introduces a custom lowering for ISD::SETCCE (introduced in r253572)
that allows us to emit a short code sequence for 64-bit compares.
Before:
push {r7, lr}
cmp r0, r2
mov.w r0, #0
mov.w r12, #0
it hs
movhs r0, #1
cmp r1, r3
it ge
movge.w r12, #1
it eq
moveq r12, r0
cmp.w r12, #0
bne .LBB1_2
@ BB#1: @ %bb1
bl f
pop {r7, pc}
.LBB1_2: @ %bb2
bl g
pop {r7, pc}
After:
push {r7, lr}
subs r0, r0, r2
sbcs.w r0, r1, r3
bge .LBB1_2
@ BB#1: @ %bb1
bl f
pop {r7, pc}
.LBB1_2: @ %bb2
bl g
pop {r7, pc}
Saves around 80KB in Chromium's libchrome.so.
Some notes on this patch:
- I don't much like the ARMISD::BRCOND and ARMISD::CMOV combines I
introduced (nothing else needs them). However, they are necessary in
order to avoid poor codegen, and they seem similar to existing combines
in other backends (e.g. X86 combines (brcond (cmp (setcc Compare))) to
(brcond Compare)).
- No support for Thumb-1. This is in principle possible, but we'd need
to implement ARMISD::SUBE for Thumb-1.
Differential Revision: http://reviews.llvm.org/D15256
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263962 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
replaceCongruentIVs can break LCSSA when trying to replace IV increments
since it tries to replace all uses of a phi node with another phi node
while both of the phi nodes are not necessarily in the processed loop.
This will cause an assert in IndVars.
To fix this, we add a check to make sure that the replacement maintains
LCSSA.
Reviewers: sanjoy
Subscribers: mzolotukhin, llvm-commits
Differential Revision: http://reviews.llvm.org/D18266
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263941 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
extract_vector_elt can cause an implicit any_ext if the types don't
match. When processing the following pattern:
(and (extract_vector_elt (load ([non_ext|any_ext|zero_ext] V))), c)
DAGCombine was ignoring the possible extend, and sometimes removing
the AND even though it was required to maintain some of the bits
in the result to 0, resulting in a miscompile.
This change fixes the issue by limiting the transformation only to
cases where the extract_vector_elt doesn't perform the implicit
extend.
Reviewers: t.p.northover, jmolloy
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D18247
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263935 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The old address space inference pass (NVPTXFavorNonGenericAddrSpaces) is unable
to convert the address space of a pointer induction variable. This patch adds a
new pass called NVPTXInferAddressSpaces that overcomes that limitation using a
fixed-point data-flow analysis (see the file header comments for details).
The new pass is experimental and not enabled by default. Users can turn
it on by setting the -nvptx-use-infer-addrspace flag of llc.
Reviewers: jholewinski, tra, jlebar
Subscribers: jholewinski, llvm-commits
Differential Revision: http://reviews.llvm.org/D17965
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263916 91177308-0d34-0410-b5e6-96231b3b80d8
Improve computeZeroableShuffleElements to be able to peek through bitcasts to extract zero/undef values from BUILD_VECTOR nodes of different element sizes to the shuffle mask.
Differential Revision: http://reviews.llvm.org/D14261
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263906 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: Also expose getters and setters in the C API, so that the change can be tested.
Reviewers: nhaehnle, axw, joker.eph
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D18260
From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263886 91177308-0d34-0410-b5e6-96231b3b80d8
Looks like I was sloppy when bridging to C.
Thanks D. Blaikie for noticing!
From: Mehdi Amini <mehdi.amini@apple.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263885 91177308-0d34-0410-b5e6-96231b3b80d8
The sinpi/cospi can be replaced with sincospi to remove unnecessary
computations. However, we need to make sure that the calls are within
the same function!
This fixes PR26993.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263875 91177308-0d34-0410-b5e6-96231b3b80d8
