llvm-svn: 119948

llvm-svn: 119947

Initialize MemDep's TD member so buildbots don't trip over an uninitialized pointer (TD is passed to PHITransAddr).

I wonder why this didn't explode earlier.

llvm-svn: 119944

folding improvements: if P points to a type of size zero, turn "gep P, N" into "P".
More generally, if a gep index type has size zero, instcombine could replace the
index with zero, but that is not done here.

llvm-svn: 119942

llvm-svn: 119941

llvm-svn: 119940

llvm-svn: 119938

the code to not add a "condition code" if it's trap.

llvm-svn: 119937

- Add comments saying where the encodings for other instructions came from.

llvm-svn: 119936

zero sized elements.  This allows us to compile:

  #include <string>
  void foo() { std::string s; }

into an empty function.

llvm-svn: 119933

llvm-svn: 119932

when transfering between i64 gprs and mmx regs.

llvm-svn: 119931

method in MemDep instead of inserting an instruction, doing a query,
then removing it.  Neither operation is effectively cached.

llvm-svn: 119930

llvm-svn: 119929

destination location of a memcpy/memmove.  I'm not clear about whether
TBAA works on these, so I'm leaving it out for now.  Dan, please revisit
this when convenient.

llvm-svn: 119928

llvm-svn: 119927

llvm-svn: 119926

llvm-svn: 119925

llvm-svn: 119923

void a(int x) { if (((1<<x)&8)==0) b(); }

into "x != 3", which occurs over 100 times in 403.gcc but in no
other program in llvm-test.

llvm-svn: 119922

llvm-svn: 119920

llvm-svn: 119918

llvm-svn: 119917

allowing the memcpy to be eliminated.

Unfortunately, the requirements on byval's without explicit 
alignment are really weak and impossible to predict in the 
mid-level optimizer, so this doesn't kick in much with current
frontends.  The fix is to change clang to set alignment on all
byval arguments.

llvm-svn: 119916

requirement on the input pointer.

llvm-svn: 119914

llvm-svn: 119913

mode variables. Handle frame indexes in load/store and allocas again.

llvm-svn: 119912

to match the one from the load emitter above.

llvm-svn: 119911

llvm-svn: 119908

llvm-svn: 119907

llvm-svn: 119905

llvm-svn: 119904

llvm-svn: 119903

Disable warning C4291 on MSVC. Caused because class AttributeList provides a non implemented operator delete without a corresponding new. 

llvm-svn: 119902

so don't claim they are.  They are allocated using DAG.getNode, so attempts
to access MemSDNode fields results in reading off the end of the allocated
memory.  This fixes crashes with "llc -debug" due to debug code trying to
print MemSDNode fields for these barrier nodes (since the crashes are not
deterministic, use valgrind to see this).  Add some nasty checking to try
to catch this kind of thing in the future.

llvm-svn: 119901

Removing the useless test that I added recently. It was meant as an example, but not complicated enough to merit another test.

llvm-svn: 119898

llvm-svn: 119896

llvm-svn: 119895

llvm-svn: 119884

llvm-svn: 119883