llvm-svn: 30277

llvm-svn: 30276

Handle this.  This fixes PR908 and Transforms/LICM/2006-09-12-DeadUserOfSunkInstr.ll

llvm-svn: 30275

llvm-svn: 30274

llvm-svn: 30273

llvm-svn: 30271

is being removed.

llvm-svn: 30270

llvm-svn: 30269

llvm-svn: 30268

llvm-svn: 30267

llvm-svn: 30266

llvm-svn: 30265

llvm-svn: 30262

llvm-svn: 30261

llvm-svn: 30253

llvm-svn: 30252

llvm-svn: 30251

llvm-svn: 30248

llvm-svn: 30247

llvm-svn: 30246

llvm-svn: 30245

llvm-svn: 30244

llvm-svn: 30243

   the branch's chain is also produced by cmp.
          [ch, r : ld]
             ^ ^
             | |
      [XX]--/   \- [flag : cmp]
       ^             ^
       |             |
       \---[br flag]-

Remove an isel check which prevents loads from being folded into cmp / test
instructions.

2) Whenever possible, delete a selected node to allow more load folding
opportunities. Note not all nodes can be deleted after it has been
selected. Some may have simply morphed; some have not changed at all (e.g.
EntryToken).

llvm-svn: 30242

operand of a conditional branch to allow load folding into CMP / TEST
instructions.

llvm-svn: 30241

llvm-svn: 30240

llvm-svn: 30239

add a testcase for this commit: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050606/026673.html

llvm-svn: 30238

bit.  This fixes Regression/Transforms/TailDup/MergeTest.ll

llvm-svn: 30237

due to switch cases going to the same place, it make #pred != #phi entries,
breaking live interval analysis.

This fixes 458.sjeng on x86 with llc.

llvm-svn: 30236

operations (like findProperties) should be faster, at the expense of
unionSets being slower in cases that are rare in practise.

Don't erase a dead Instruction. This fixes a memory corruption issue.

llvm-svn: 30235

llvm-svn: 30234

llvm-svn: 30233

llvm-svn: 30232

llvm-svn: 30231

This implements select.ll::test18.

llvm-svn: 30230

llvm-svn: 30229

llvm-svn: 30227

llvm-svn: 30226

llvm-svn: 30225