llvm-svn: 167086

This is important for loops in the LAPACK test-suite.
These loops start at 1 because they are auto-converted from fortran.

llvm-svn: 167084

This patch migrates the stpcpy optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.  Note that the
__stpcpy_chk simplifications were migrated in a previous commit.

llvm-svn: 167083

r166198 migrated the strcpy optimization to instcombine.  The strcpy
simplifier that was migrated from Transforms/Scalar/SimplifyLibCalls.cpp
was also doing some __strcpy_chk simplifications.  Those fortified
simplifications were migrated as well, but introduced a bug in the
__stpcpy_chk simplifier in the process.  This happened because the
__strcpy_chk and __stpcpy_chk simplifiers were both mapped to StrCpyChkOpt
which was updated with simplifications that worked for __strcpy_chk, but
not __stpcpy_chk.

This patch fixes the problem by adding proper test coverage and creating a
new simplifier for __stpcpy_chk (instead of sharing one with __strcpy_chk).

llvm-svn: 167082

the first source operand is tied to the destination operand.

This is to accurately model the corresponding instructions where the upper
bits are unmodified.

rdar://12558838
PR14221

llvm-svn: 167064

llvm-svn: 167057

We used to generate a store (movq) + a load.
Now we use movd.

rdar://9946746

llvm-svn: 167056

llvm-svn: 167055

yet, but it's better.

llvm-svn: 167053

integers in that the code to handle split alloca-wide integer loads or
stores doesn't come first. It should, for the same reasons as with
integers, and the PR attests to that. Also had to fix a busted assert in
that this test case also covers.

llvm-svn: 167051

llvm-svn: 167050

Instead of recomputing relative pointer information just prior to fusing,
cache this information (which also needs to be computed during the
candidate-pair selection process). This cuts down on the total number of
SE queries made, and also is a necessary intermediate step on the road toward
including shuffle costs in the pair selection procedure.

No functionality change is intended.

llvm-svn: 167049

use the caller's stack.

llvm-svn: 167048

llvm-svn: 167046

Thanks to Preston Briggs for catching this!

llvm-svn: 167045

We need to make sure that we take the correct load/store alignment
when the inputs are flipped.

llvm-svn: 167044

information will be used by IsEligibleForTailCallOptimization to determine
whether a call can be tail-call optimized.

llvm-svn: 167043

Stop propagating the FlipMemInputs variable into the routines that
create the replacement instructions. Instead, just flip the arguments
of those routines. This allows for some associated cleanup (not all
of which is done here). No functionality change is intended.

llvm-svn: 167042

for passing a function call argument on a stack.

llvm-svn: 167041

the MachineInstr MayLoad/MayLoad flags are based on the tablegen implementation.
For inline assembly, however, we need to compute these based on the constraints.

Revert r166929 as this is no longer needed, but leave the test case in place. 
rdar://12033048 and PR13504

llvm-svn: 167040

llvm-svn: 167039

SE was being called during the instruction-fusion process (when the result
is unreliable, and thus ignored). No functionality change is intended.

llvm-svn: 167037

llvm-svn: 167036

Speedup SciMark by 1%

llvm-svn: 167035

This patch expands FSQRT for floating point vector types when altivec is
used.

llvm-svn: 167034

LoopVectorize: Fix a bug in the initialization of reduction variables. AND needs to start at all-one
while XOR, and OR need to start at zero.

llvm-svn: 167032

llvm-svn: 167029

llvm-svn: 167027

llvm-svn: 167020

with different sizes.

llvm-svn: 167018

This patch adds more support for vector type comparisons using altivec.
It adds correct support for v16i8, v8i16, v4i32, and v4f32 vector
types for comparison operators ==, !=, >, >=, <, and <=.

llvm-svn: 167015

Simplify the implementation of the corresponding integer and float functions and
move them inline while there.

llvm-svn: 167014

This fixes Clang :: CodeGen/complex-builtints.c on PowerPC.

llvm-svn: 167013

When the switch-to-lookup tables transform landed in SimplifyCFG, it
was pointed out that this could be inappropriate for some targets.
Since there was no way at the time for the pass to know anything about
the target, an awkward reverse-transform was added in CodeGenPrepare
that turned lookup tables back into switches for some targets.

This patch uses the new TargetTransformInfo to determine if a
switch should be transformed, and removes
CodeGenPrepare::ConvertLoadToSwitch.

llvm-svn: 167011

getCastInstrCost had an assert prohibiting scalar to vector casts. Such casts,
however, are allowed. This should make the vectorizer buildbot happier.

llvm-svn: 166998

When the operand is a plain immediate rather than a label, print it
as [pc, #imm] like we do for the Thumb2 wide encoding variant.

rdar://12154503

llvm-svn: 166991

We will make them delay slot forms if there is something that can be
placed in the delay slot during a separate pass. Mips16 extended instructions
cannot be placed in delay slots.

llvm-svn: 166990

LoopVectorizer: change debug prints: Print the module identifier when deciding to vectorize. When deciding not to vectorize do not print the called function name because it can be null.

llvm-svn: 166989

to test it with chapni's fix (-mattr=+avx).

llvm-svn: 166985

is 24 bits not 20 and the decoding needed to correctly handle converting the
J1 and J2 bits to their I1 and I2 values to reconstruct the displacement. 

llvm-svn: 166982