SLPVectorize: Replace the code that checks for vectorization candidates in successor blocks with code that scans PHINodes.
Before we could vectorize PHINodes scanning successors was a good way of finding candidates. Now we can vectorize the phinodes which is simpler.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186139 91177308-0d34-0410-b5e6-96231b3b80d8
PEI: refactor replaceFrameIndices(MF) to call replaceFrameIndices(BB).

replaceFrameIndices(MF) will iterate over the BBs and call
replaceFrameIndices(BB). No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186141 91177308-0d34-0410-b5e6-96231b3b80d8
Windows/TimeValue.inc: Mute prefixed '0' on %d to emulate %e.

It fixes compatibility in llvm/test/Object/archive-toc.test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186142 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/Object/archive-toc.test: Use env(1) to satisfy win32 hosts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186143 91177308-0d34-0410-b5e6-96231b3b80d8
Target/X86: Add explicit Win64 and System V/x86-64 calling conventions.

Summary:
This patch adds explicit calling convention types for the Win64 and
System V/x86-64 ABIs. This allows code to override the default, and use
the Win64 convention on a target that wants to use SysV (and
vice-versa). This is needed to implement the `ms_abi` and `sysv_abi` GNU
attributes.

Reviewers:

CC:

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186144 91177308-0d34-0410-b5e6-96231b3b80d8
SLPVectorizer: Sink and enable CSE for ExtractElements.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186145 91177308-0d34-0410-b5e6-96231b3b80d8
Stylistic change.

Thank Nick for figuring out these problems.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186146 91177308-0d34-0410-b5e6-96231b3b80d8
[SystemZ] Improve spilling of LGDR and LDGR

If the source of these instructions is spilled we should load the destination.
If the destination is spilled we should store the source.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186147 91177308-0d34-0410-b5e6-96231b3b80d8
[SystemZ] Fix parsing of inline asm registers

GPR and FPR constraints like "{r2}" and "{f2}" weren't handled correctly
because the name-to-regno mapping depends on the value type and
(because of that) the internal names in RegStrings are not the
same as the AsmName.

CC constraints like "{cc}" didn't work either because there was no
associated register class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186148 91177308-0d34-0410-b5e6-96231b3b80d8
[SystemZ] Optimize sign-extends of vector setccs

Normal (sext (setcc ...)) sequences are optimised into
(select_cc ..., -1, 0) by DAGCombiner::visitSIGN_EXTEND.
However, this is deliberately not done for vectors, and after
vector type legalization we have (sext_inreg (setcc ...)) instead.

I wondered about trying to extend DAGCombiner to handle this case too,
but it seemed to be a loss on some other targets I tried, even those for
which SETCC isn't "legal" and SELECT_CC is.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186149 91177308-0d34-0410-b5e6-96231b3b80d8
[SystemZ] Add test missing from r186148

Sigh, twice in two days sorry.  One day I'll remember...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186150 91177308-0d34-0410-b5e6-96231b3b80d8
Add support for Mips break and syscall insructions. The corresponding test cases are added.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186151 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "indvars: Improve LFTR by eliminating truncation when comparing
against a constant."

This reverts commit r186107. It didn't handle wrapping arithmetic in the
loop correctly and thus caused the following C program to count from
0 to UINT64_MAX instead of from 0 to 255 as intended:

  #include <stdio.h>
  int main() {
    unsigned char first = 0, last = 255;
    do { printf("%d\n", first); } while (first++ != last);
  }

Full test case and instructions to reproduce with just the -indvars pass
sent to the original review thread rather than to r186107's commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186152 91177308-0d34-0410-b5e6-96231b3b80d8
Mark MDNode::getOperand as readonly.

We can't inline it but we can still CSE calls to it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186156 91177308-0d34-0410-b5e6-96231b3b80d8
Don't reject an empty archive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186159 91177308-0d34-0410-b5e6-96231b3b80d8
Add new directive called CHECK-LABEL to FileCheck.

CHECK-LABEL is meant to be used in place on CHECK on lines containing identifiers or other unique labels (they need not actually be labels in the source or output language, though.) This is used to break up the input stream into separate blocks delineated by CHECK-LABEL lines, each of which is checked independently. This greatly improves the accuracy of errors and fix-it hints in many cases, and allows for FileCheck to recover from errors in one block by continuing to subsequent blocks.

Some tests will be converted to use this new directive in forthcoming patches.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186162 91177308-0d34-0410-b5e6-96231b3b80d8
Start using CHECK-LABEL in some tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186163 91177308-0d34-0410-b5e6-96231b3b80d8
X86: fold SSE2/AVX2 logical shift by immediate amount into zero vector when possible

Patch by Andrea Di Biagio


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186165 91177308-0d34-0410-b5e6-96231b3b80d8
Add static.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186170 91177308-0d34-0410-b5e6-96231b3b80d8
X86: Shrink certain forms of movsx.

In particular:
movsbw %al, %ax   --> cbtw
movswl %ax, %eax  --> cwtl
movslq %eax, %rax --> cltq

According to Intel's manual those have the same performance characteristics but
come with a smaller encoding.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186174 91177308-0d34-0410-b5e6-96231b3b80d8