llvm-svn: 53636

llvm-svn: 53635

just use the AllNodes order, which is at least relatively stable
across runs.

llvm-svn: 53632

llvm-svn: 53631

llvm-svn: 53628

llvm-svn: 53627

isRetain() and isRelease() now only returns true if "Retain"/"Release" appears in the suffix of a function's name.

llvm-svn: 53621

llvm-svn: 53620

llvm-svn: 53619

these as options to the user of scan-build.

llvm-svn: 53618

llvm-svn: 53617

llvm-svn: 53616

Have GVN do a pre-pass over the CFG that folds away unconditional branches where possible.  This allows local PRE to be more aggressive.

llvm-svn: 53615

llvm-svn: 53614

llvm-svn: 53613

allowed to canonicalize return values).

Add a test that checks if return value and function attributes are not removed.

llvm-svn: 53612

llvm-svn: 53611

again canonicalizes {i32} into i32 and {} into void.

llvm-svn: 53610

return value as a whole in deadargelim is really not needed now that we simply
rebuild the old return value and actually prevents some canonicalization from
taking place.

This revert stops deadargelim from changing {i32} into i32 for now, but I'll
fix that next.

llvm-svn: 53609

return values that are still (partially) live. Instead of updating all uses of
a call instruction after removing some elements, it now just rebuilds the
original struct (With undef gaps where the unused values were) and leaves it to
instcombine to clean this up.

The added testcase still fails currently, but this is due to instcombine which
isn't good enough yet. I will fix that part next.

llvm-svn: 53608

llvm-svn: 53607

only the liveness of partial return values (for functions returning a struct).
This is more explicit to prevent unwanted changes in the return value. 

In particular, deadargelim now canonicalizes a function returning {i32} to
returning i32 and {} to void, if the struct returned is not used in its
entirety, but only the single element is used.

llvm-svn: 53606

llvm-svn: 53605

In LegalizeDAG the value is zero-extended to
the new type before byte swapping.  It doesn't
matter how the extension is done since the new
bits are shifted off anyway after the swap, so
extend by any old rubbish bits.  This results
in the final assembler for the testcase being
one line shorter.

llvm-svn: 53604

llvm-svn: 53603

No change in functionality.

llvm-svn: 53602

and return values live for those functions. This doesn't change anything yet,
but prepares for the coming commits.

llvm-svn: 53601

llvm-svn: 53600

RetOrArg::getDescription() as const.

llvm-svn: 53599

llvm-svn: 53598

llvm-svn: 53592

method, to slightly simplify control flow.

llvm-svn: 53591

llvm-svn: 53590

llvm-svn: 53589

llvm-svn: 53588

I swear that didn't show up in svn diff...

llvm-svn: 53587

llvm-svn: 53586

llvm-svn: 53585

Provide an "Analysis Scope" for Analyses so checks can either be run on code declarations (bodies) or Objective-C @implementation blocks.

llvm-svn: 53584

LinkOnce definitions have default scope, like weak definitions. Otherwise, the linker may not be able to match LinkOnce definition from one module with an exteranl reference from other module.

llvm-svn: 53580