llvm-svn: 138933

Resubmit with fix. Properly remove the instructions except for landingpad, which should be removed only when its invokes are.

llvm-svn: 138932

llvm-svn: 138931

The landingpad instruction can be removed only when its invokes are removed.

llvm-svn: 138930

llvm-svn: 138928

llvm-svn: 138927

llvm-svn: 138925

Added canClobberReachingPhysRegUse() to handle a particular pattern in
which a two-address instruction could be forced to interfere with
EFLAGS, causing a compare to be unnecessarilly cloned.
Fixes rdar://problem/5875261

llvm-svn: 138924

This was found via a nightly build of 483.xalancbmk.

llvm-svn: 138923

llvm-svn: 138922

llvm-svn: 138918

llvm-svn: 138916

llvm-svn: 138915

llvm-svn: 138914

Make sure the low bit of the PC is set when loading an address directly
for jump tables in static relocation model.

llvm-svn: 138912

The asm parser currently selects the wrong encoding for non-conditional Thumb2 branches.  However, this exposed a number of situations where the decoder was too permissive in allowing invalid instructions to decode successful.  Specify additional fixed bits to close those gaps.

llvm-svn: 138910

llvm-svn: 138908

llvm-svn: 138906

llvm-svn: 138905

llvm-svn: 138904

llvm-svn: 138903

Add tests for the transformations SCCP can do on atomic loads and stores (which are safe without any modifications).

llvm-svn: 138902

Stores sizes as uint64_t to avoid possible truncation.

llvm-svn: 138901

llvm-svn: 138900

llvm-svn: 138898

llvm-svn: 138897

llvm-svn: 138896

llvm-svn: 138895

llvm-svn: 138894

llvm-svn: 138891

The landingpad instruction is required in the landing pad block. Because we're
not deleting terminating instructions, the invoke may still jump to here (see
Transforms/SCCP/2004-11-16-DeadInvoke.ll). Remove all uses of the landingpad
instruction, but keep it around until code-gen can remove the basic block.

llvm-svn: 138890

llvm-svn: 138889

llvm-svn: 138887

When performing instruction selection for LDR_PRE_IMM/LDRB_PRE_IMM, we still need to preserve the sign of the index.  This fixes miscompilations of Quicksort in the nightly testsuite, and hopefully others as well.
<rdar://problem/10046188>

llvm-svn: 138885

Thumb2 is a superset of Thumb1, so all of the encodings should still work.

llvm-svn: 138883

When we want encoding T3 (the wide encoding), we can explicitly check for
that and twiddle the CanAcceptCarrySet accordingly. For now, just correctly
handle encodings T1 and T2 when in Thumb2 mode.

llvm-svn: 138879

Fill in type legalization for MERGE_VALUES in all the various cases.  Patch by Micah Villmow.  (No testcase because the issue only showed up in an out-of-tree backend.)

llvm-svn: 138877

llvm-svn: 138876

llvm-svn: 138874

llvm-svn: 138873