Iterators folloring a SmallVector erased element are invalidated so
don't access cached iterators from after the erased element.

Re-apply 49056 with SmallVector support.

llvm-svn: 49106

llvm-svn: 49060

Iterators folloring a SmallVector erased element are invalidated so
don't access cached iterators from after the erased element.

llvm-svn: 49056

Increment iterator in advance.

llvm-svn: 48890

llvm-svn: 48738

Fixes PR 2030.

llvm-svn: 47141

llvm-svn: 47093

llvm-svn: 47089

llvm-svn: 47082

llvm-svn: 46898

These loops are not yet handled.

Fix PR 1912.

llvm-svn: 46484

llvm-svn: 45418

insert new ExitValue after this operand definition.

This fixes PR1828.

llvm-svn: 44539

This fixes PR714.

llvm-svn: 42309

doh.. 

llvm-svn: 42300

for (i=A; i<N; i++) {
  if (i < X && i > Y)
    do_something();
}

is transformed into

U=min(N,X); L=max(A,Y);
for (i=L;i<U;i++)
  do_somethihg();                            

llvm-svn: 42299

llvm-svn: 42209

llvm-svn: 42178

llvm-svn: 42122

for (int i = 0; i < N; ++i) {
  if (i == somevalue)
    dosomething();
   else
    dosomethingelse();
}

llvm-svn: 42121

llvm-svn: 42120

llvm-svn: 42119

for(int i = 0; i < N; i++) {
	if ( i == XYZ) {
		A;
	else
		B;
	}
	C;
	D;
}

llvm-svn: 42058

llvm-svn: 42054

(http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070910/053370.html). It's
causing SPASS to fail.

llvm-svn: 41938

llvm-svn: 41829

llvm-svn: 41826

llvm-svn: 41823

llvm-svn: 41822

llvm-svn: 41821

llvm-svn: 41817

llvm-svn: 41800

llvm-svn: 41516

Move exit condition and exit branch from exiting block into loop header and dominator info. This avoid execution of dead iteration. Loop is already filter in the beginning such that this change is safe.

llvm-svn: 41394

llvm-svn: 41389

While calculating upper loop bound for first loop and lower loop bound for second loop, take care of edge cases.

llvm-svn: 41387

Fix regression that I caused yesterday night while adding logic to select appropriate split condition branch.

llvm-svn: 41365

condition predicate is GT or GE then execute false branch first.

llvm-svn: 41358

llvm-svn: 41357

llvm-svn: 41356