llvm-svn: 120994

llvm-svn: 120993

the LHS, or else the pointer might be invalid.  This is kindof dumb, but
go ahead and make sure we're doing that for l-value scalar assignment,
which fixes a miscompile of obj-c++.dg/block-seq.mm.

Leave a FIXME for how to solve this problem for agg __blocks.

llvm-svn: 120992

llvm-svn: 120991

build one when either of the operands calls itself type-dependent;
previously we were building when one of the operand types was dependent,
which is not always the same thing and which can lead to unfortunate
inconsistencies later.  Fixes PR8739.

llvm-svn: 120990

llvm-svn: 120989

llvm-svn: 120988

llvm-svn: 120987

llvm-svn: 120986

llvm-svn: 120985

implementation needs it for wchar_t and SmallVectorImpl in general.

llvm-svn: 120984

llvm-svn: 120982

that on the ELF writer to detect a section we created.

llvm-svn: 120981

llvm-svn: 120980

llvm-svn: 120979

llvm-svn: 120978

llvm-svn: 120977

Add bug number for current expected failures.

llvm-svn: 120976

more completely. Example expressions are in the comments.

llvm-svn: 120975

memcpy's like:
  memcpy(A, B)
  memcpy(A, C)

we cannot delete the first memcpy as dead if A and C might be aliases.
If so, we actually get:

  memcpy(A, B)
  memcpy(A, A)

which is not correct to transform into:

  memcpy(A, A)

This patch was heavily influenced by Jakub Staszak's patch in PR8728, thanks
Jakub!

llvm-svn: 120974

llvm-svn: 120973

(for example, string literals) were being flagged
erroneously as undefined external variables.

llvm-svn: 120972

llvm-svn: 120971

llvm-svn: 120970

Environment::lookupExpr() and move its implementation
out-of-line.

llvm-svn: 120969

llvm-svn: 120968

Added a less than operator that will compare the internal opaque pointer values so SBBroadcaster objects can be contained in ordered containers or sorted.

llvm-svn: 120967

llvm-svn: 120966

llvm-svn: 120965

llvm-svn: 120964

StrongPHIElimination.

llvm-svn: 120961

difficult on current ARM implementations for a few reasons.
1. Even though a single vmla has latency that is one cycle shorter than a pair
   of vmul + vadd, a RAW hazard during the first (4? on Cortex-a8) can cause
   additional pipeline stall. So it's frequently better to single codegen
   vmul + vadd.
2. A vmla folowed by a vmul, vmadd, or vsub causes the second fp instruction to
   stall for 4 cycles. We need to schedule them apart.
3. A vmla followed vmla is a special case. Obvious issuing back to back RAW
   vmla + vmla is very bad. But this isn't ideal either:
     vmul
     vadd
     vmla
   Instead, we want to expand the second vmla:
     vmla
     vmul
     vadd
   Even with the 4 cycle vmul stall, the second sequence is still 2 cycles
   faster.

Up to now, isel simply avoid codegen'ing fp vmla / vmls. This works well enough
but it isn't the optimial solution. This patch attempts to make it possible to
use vmla / vmls in cases where it is profitable.

A. Add missing isel predicates which cause vmla to be codegen'ed.
B. Make sure the fmul in (fadd (fmul)) has a single use. We don't want to
   compute a fmul and a fmla.
C. Add additional isel checks for vmla, avoid cases where vmla is feeding into
   fp instructions (except for the #3 exceptional case).
D. Add ARM hazard recognizer to model the vmla / vmls hazards.
E. Add a special pre-regalloc case to expand vmla / vmls when it's likely the
   vmla / vmls will trigger one of the special hazards.

Work in progress, only A+B are enabled.

llvm-svn: 120960

llvm-svn: 120959

Clarify some of the differences between indexing with getelementptr and indexing with insertvalue/extractvalue.

llvm-svn: 120957

Also add asserts that the indices are valid in InsertValueInst::init(). ExtractValueInst already asserts when constructed with invalid indices.

llvm-svn: 120956

token.

llvm-svn: 120954

PHIElimination.h.

llvm-svn: 120953

time, this method existed, but now PHIElimination uses the method of the same
name on MachineBasicBlock.

llvm-svn: 120952

function so that it can be shared with StrongPHIElimination.

llvm-svn: 120951

llvm-svn: 120949