Do not run tests MappedMemoryTest.BasicWrite and MultipleWrite unless both
MF_READ and MF_WRITE are set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169439 91177308-0d34-0410-b5e6-96231b3b80d8
PR10867. lit would interpret

  RUN: a
  RUN: b || true

as "a && (b || true)" in Tcl mode, and as "(a && b) || true" in sh mode.
Everyone seems to (quite reasonably) write tests assuming the Tcl behavior,
so use that in sh mode too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169441 91177308-0d34-0410-b5e6-96231b3b80d8
RegPressureTracker::dump(): Remove unnecessary argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169443 91177308-0d34-0410-b5e6-96231b3b80d8
PR10867: Analogue of r169441 for when using external 'sh'. And actually run the test!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169446 91177308-0d34-0410-b5e6-96231b3b80d8
Taking ownership of indvars/lsr.

Evan nominated me for this a while back, and no one has offered to
save me from it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169447 91177308-0d34-0410-b5e6-96231b3b80d8
Have CannotBeNegativeZero() be aware of the nsz fast-math flag

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169452 91177308-0d34-0410-b5e6-96231b3b80d8
Set the 'MadeChange' variable if we are deleting blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169455 91177308-0d34-0410-b5e6-96231b3b80d8

change MCContext to work on the doInitialization/doFinalization model

reviewed by Evan Cheng <evan.cheng@apple.com>



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169456 91177308-0d34-0410-b5e6-96231b3b80d8
Let targets provide hooks that compute known zero and ones for any_extend
and extload's. If they are implemented as zero-extend, or implicitly
zero-extend, then this can enable more demanded bits optimizations. e.g.

define void @foo(i16* %ptr, i32 %a) nounwind {
entry:
  %tmp1 = icmp ult i32 %a, 100
  br i1 %tmp1, label %bb1, label %bb2
bb1:
  %tmp2 = load i16* %ptr, align 2
  br label %bb2
bb2:
  %tmp3 = phi i16 [ 0, %entry ], [ %tmp2, %bb1 ]
  %cmp = icmp ult i16 %tmp3, 24
  br i1 %cmp, label %bb3, label %exit
bb3:
  call void @bar() nounwind
  br label %exit
exit:
  ret void
}

This compiles to the followings before:
        push    {lr}
        mov     r2, #0
        cmp     r1, #99
        bhi     LBB0_2
@ BB#1:                                 @ %bb1
        ldrh    r2, [r0]
LBB0_2:                                 @ %bb2
        uxth    r0, r2
        cmp     r0, #23
        bhi     LBB0_4
@ BB#3:                                 @ %bb3
        bl      _bar
LBB0_4:                                 @ %exit
        pop     {lr}
        bx      lr

The uxth is not needed since ldrh implicitly zero-extend the high bits. With
this change it's eliminated.

rdar://12771555


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169459 91177308-0d34-0410-b5e6-96231b3b80d8
[arm fast-isel] Make the fast-isel implementation of memcpy respect alignment.
rdar://12821569

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169460 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r169456, "change MCContext to work on the doInitialization/doFinalization model"

It broke many builders.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169462 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/CodeGen/ARM/extload-knownzero.ll: Try to unbreak, to add -O0. I guess Chad expects fastisel here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169463 91177308-0d34-0410-b5e6-96231b3b80d8
Properly fix the tes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169464 91177308-0d34-0410-b5e6-96231b3b80d8
Mark MOVDQ(A/U)rm as ReMaterializable. Mark all MOVDQ(A/U) instructions as neverHasSideEffects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169477 91177308-0d34-0410-b5e6-96231b3b80d8
Remove intrinsic specific instructions for (V)MOVQUmr with patterns pointing to the normal instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169482 91177308-0d34-0410-b5e6-96231b3b80d8
Handle non-default array bounds.

Some languages, e.g. Ada and Pascal, allow you to specify that the array bounds
are different from the default (1 in these cases). If we have a lower bound
that's non-default, then we emit the lower bound. We also calculate the correct
upper bound in those cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169484 91177308-0d34-0410-b5e6-96231b3b80d8
s/getLowerBoundDefault/getDefaultLowerBound/ for consistency. Also put the more natural check first in the if-then statement.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169486 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Do not store origin for clean values.

Instead of unconditionally storing origin with every application store,
only do this when the shadow of the stored value is != 0.

This change also delays instrumentation of stores until after the walk over
function's instructions, because adding new basic blocks confuses InstVisitor.

We only keep 1 origin value per 4 bytes of application memory. This change
fixes the bug when a store of a single clean byte wiped the origin for the
whole 4-byte area.

Since stores of uninitialized values are relatively uncommon, this change
improves performance of track-origins mode by 5% median and by up to 47% on
specs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169490 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Fix a typo in a comment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169491 91177308-0d34-0410-b5e6-96231b3b80d8
MemorySanitizer.cpp: Suppress a warning. [-Wunused-variable]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169504 91177308-0d34-0410-b5e6-96231b3b80d8