It seems that the run time for Windows has changed and supports more math
functions than it used to, especially on AArch64, ARM, and AMD64.

Fixes PR40541.

Differential revision: https://reviews.llvm.org/D57625

llvm-svn: 353733

This reverts accidental commit ff552771.

llvm-svn: 353118

It seems that the run time for Windows has changed and supports more math
functions than before.  Since LLVM requires at least VS2015, I assume that
this is the run time that would be redistributed with programs built with
Clang.  Thus, I based this update on the header file `math.h` that
accompanies it.

This patch addresses the PR40541.  Unfortunately, I have no access to a
Windows development environment to validate it.

llvm-svn: 353114

Added the checks to the existing cases when the target is Win64.

llvm-svn: 352714

llvm-svn: 352707

Generalize the simplification of `pow(2.0, y)` to `pow(2.0 ** n, y)` for all
scalar and vector types.

This improvement helps some benchmarks in SPEC CPU2000 and CPU2006, such as
252.eon, 447.dealII, 453.povray.  Otherwise, no significant regressions on
x86-64 or A64.

Differential revision: https://reviews.llvm.org/D49273

llvm-svn: 341095

It broke the clang-cl self-host.

llvm-svn: 340991

Generalize the simplification of `pow(2.0, y)` to `pow(2.0 ** n, y)` for all
scalar and vector types.

This improvement helps some benchmarks in SPEC CPU2000 and CPU2006, such as
252.eon, 447.dealII, 453.povray.  Otherwise, no significant regressions on
x86-64 or A64.

Differential revision: https://reviews.llvm.org/D49273

llvm-svn: 340947

In prepatration for the improvements that D49273 enables.

llvm-svn: 340060

llvm-svn: 339900

Expand the number of cases when `pow(x, 0.5)` is simplified into `sqrt(x)`
by considering the math semantics with more granularity.

Differential revision: https://reviews.llvm.org/D50036

llvm-svn: 339887

llvm-svn: 339681

Also consider vector constants when simplifying `pow()`.

Differential revision: https://reviews.llvm.org/D50035

llvm-svn: 339578

Add test case for the simplification of `pow()` for vector types that D50035
enables.

llvm-svn: 338463

Follow-up for a bug that's similar to:
https://bugs.llvm.org/show_bug.cgi?id=35601

llvm-svn: 320312

llvm-svn: 320311

This should fix the larger problem with sqrt shown in:
https://bugs.llvm.org/show_bug.cgi?id=35601

llvm-svn: 320310

llvm-svn: 320309

llvm-svn: 318006

Add missing fabs(fpext) optimzation that worked with the call,
and also fixes it creating a second fpext when there were multiple
uses.

llvm-svn: 292172

Differential Revision:  https://reviews.llvm.org/D22104

llvm-svn: 277963

llvm-svn: 251811

are operations that do not access memory but may be sensitive
to floating-point environment changes. LLVM does not attempt
to model FP environment changes, so this was unnecessarily conservative
and was getting on the way of some optimizations, in particular
SLP vectorization.

llvm-svn: 203037

llvm-svn: 197348

llvm-svn: 197109

llvm-svn: 196732

llvm-svn: 196544

* pow(x, 0.5) -> fabs(sqrt(x)) 
* pow(2.0, x) -> exp2(x)

llvm-svn: 188656

This update was done with the following bash script:

  find test/Transforms -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc" $NAME; then
      TEMP=`mktemp -t temp`
      cp $NAME $TEMP
      sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \
      while read FUNC; do
        sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP
      done
      mv $TEMP $NAME
    fi
  done

llvm-svn: 186268

Listing all of the attributes for the callee of a call/invoke instruction is way
too much and makes the IR unreadable. Use references to attributes instead.

llvm-svn: 175877

This patch migrates the math library call simplifications from the
simplify-libcalls pass into the instcombine library call simplifier.

I have typically migrated just one simplifier at a time, but the math
simplifiers are interdependent because:

   1. CosOpt, PowOpt, and Exp2Opt all depend on UnaryDoubleFPOpt.
   2. CosOpt, PowOpt, Exp2Opt, and UnaryDoubleFPOpt all depend on
      the option -enable-double-float-shrink.

These two factors made migrating each of these simplifiers individually
more of a pain than it would be worth.  So, I migrated them all together.

llvm-svn: 167815