of apint codegen failure is the DAG combiner doing
the wrong thing because it was comparing MVT's using
< rather than comparing the number of bits.  Removing
the < method makes this mistake impossible to commit.
Instead, add helper methods for comparing bits and use
them.

llvm-svn: 52098

don't make i1 phis when it won't be possible to eliminate them.

llvm-svn: 52097

llvm-svn: 52096

Try to improve language in various places.  Use
X86 always rather than sometimes using x86.  Add
some minor Ada info.

llvm-svn: 52095

llvm-svn: 52094

llvm-svn: 52093

llvm-svn: 52091

llvm-svn: 52090

llvm-svn: 52087

llvm-svn: 52086

llvm-svn: 52085

llvm-svn: 52079

llvm-svn: 52077

Speculatively execute a block when the the block is the then part of a triangle shape and it contains a single, side effect free, cheap instruction. The branch is eliminated by adding a select instruction. i.e.

Turn                                                                                                                                                                                                       
BB:                                                                                                                                                                                                        
    %t1 = icmp                                                                                                                                                                                             
    br i1 %t1, label %BB1, label %BB2                                                                                                                                                                      
BB1:                                                                                                                                                                                                       
    %t3 = add %t2, c                                                                                                                                                                                       
    br label BB2                                                                                                                                                                                           
BB2:                                                                                                                                                                                                       
=>                                                                                                                                                                                                         
BB:                                                                                                                                                                                                        
    %t1 = icmp                                                                                                                                                                                             
    %t4 = add %t2, c                                                                                                                                                                                       
    %t3 = select i1 %t1, %t2, %t3

llvm-svn: 52073

llvm-svn: 52072

llvm-svn: 52071

stores of aggregate values.

llvm-svn: 52069

no visible functionality change, but enables a future patch where node creation
will update the CFG if it decides to create an unconditional rather than a conditional branch.

llvm-svn: 52067

get rid of ExtractValueInst::init's Value argument, it is already passed to the UnaryInstruction ctor

llvm-svn: 52064

llvm-svn: 52062

llvm-svn: 52061

llvm-svn: 52057

llvm-svn: 52056

llvm-svn: 52053

llvm-svn: 52052

llvm-svn: 52048

llvm-svn: 52047

llvm-svn: 52046

llvm-svn: 52045

and better control the abstraction.  Rename the type
to MVT.  To update out-of-tree patches, the main
thing to do is to rename MVT::ValueType to MVT, and
rewrite expressions like MVT::getSizeInBits(VT) in
the form VT.getSizeInBits().  Use VT.getSimpleVT()
to extract a MVT::SimpleValueType for use in switch
statements (you will get an assert failure if VT is
an extended value type - these shouldn't exist after
type legalization).
This results in a small speedup of codegen and no
new testsuite failures (x86-64 linux).

llvm-svn: 52044

otherwise, opt might crash.

llvm-svn: 52041

llvm-svn: 52040

This is necessary on windows targets, since stdout is in text mode there.
Patch by Julien Lerouge!

llvm-svn: 52038

Patch by Julien Lerouge!

llvm-svn: 52037

MUL is not anymore directly matched because its a pseudoinstruction.
LogicI class fixed to zero-extend immediates. 

llvm-svn: 52036

Added special isel for ADDE,SUBE and new patterns to match SUBC,ADDC

llvm-svn: 52031

llvm-svn: 52030

llvm-svn: 52029

with definitions or not.

llvm-svn: 52028

llvm-svn: 52027