instruction, not after. This fixes some uses of free'd memory.

llvm-svn: 56908

llvm-svn: 56834

llvm-svn: 56716

- return attributes - inreg, zext and sext
- parameter attributes
- function attributes - nounwind, readonly, readnone, noreturn

Return attributes use 0 as the index.
Function attributes use ~0U as the index.

This patch requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56704

s/ParamAttr/Attribute/g
s/PAList/AttrList/g
s/FnAttributeWithIndex/AttributeWithIndex/g
s/FnAttr/Attribute/g

This sets the stage 
- to implement function notes as function attributes and 
- to distinguish between function attributes and return value attributes.

This requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56622

llvm-svn: 56549

llvm-svn: 56546

llvm-svn: 56535

llvm-svn: 56527

Do not check isDeclaration() in hasNote(). It is clients' responsibility.

llvm-svn: 56524

llvm-svn: 56513

Function Notes also. Function notes are stored at index ~0.

llvm-svn: 56511

llvm-svn: 56477

llvm-svn: 56419

Unfortunately this means removing one regression test
of GlobalsModRef because I couldn't work out how to
perform it without MarkModRef.

llvm-svn: 56342

Fixes PR 2805

llvm-svn: 56321

Thanks to Ji Young Park for the patch!

llvm-svn: 56316

This one slipped through cracks very well.

llvm-svn: 56284

 - Recognize expressions like "x > -1 ? x : 0" as min/max and turn them
   into expressions like "x < 0 ? 0 : x", which is easily recognizable
   as a min/max operation.
 - Refrain from folding expression like "y/2 < 1" to "y < 2" when the
   comparison is being used as part of a min or max idiom, like
   "y/2 < 1 ? 1 : y/2". In that case, the division has another use, so
   folding doesn't eliminate it, and obfuscates the min/max, making it
   harder to recognize as a min/max operation.

These benefit ScalarEvolution, CodeGen, and anything else that wants to
recognize integer min and max.

llvm-svn: 56246

cases.  See the comment above OptimizeSMax for the full story, and
the testcase for an example. This cancels out a pessimization
commonly attributed to indvars, and will allow us to lift some of
the artificial throttles in indvars, rather than add new ones.

llvm-svn: 56230

getelementptr indices, inserting an explicit cast if necessary.
This helps expose the sign-extension operation to other optimizations.

llvm-svn: 56133

Patch by Nicolas Capens!

llvm-svn: 56129

cases it was still getting lucky and detecting overflow
but it was clearly incorrect.

llvm-svn: 56113

multiplication overflows.

llvm-svn: 56082

condition. This fixes PR2740.

llvm-svn: 56076

llvm-svn: 56056

llvm-svn: 56040

extend the type of induction variable.

llvm-svn: 56017

llvm-svn: 56011

users, and teach it about shufflevector instructions.

Also, fix a subtle bug in SimplifyDemandedVectorElts'
insertelement code.

This is a patch that was originally written by Eli Friedman,
with some fixes and cleanup by me.

llvm-svn: 55995

llvm-svn: 55965

llvm-svn: 55924

llvm-svn: 55913

llvm-svn: 55861

llvm-svn: 55806

llvm-svn: 55792

llvm-svn: 55786

forms remain to handle older IR files, but will go away soon.

llvm-svn: 55781

llvm-svn: 55779

llvm-svn: 55744