http://www.gnu.org/software/autoconf/manual/autoconf.html#Generic-Programs

llvm-svn: 47943

llvm-svn: 47941

llvm-svn: 47940

llvm-svn: 47939

except ppc long double.  This allows us to shrink constant pool
entries for x86 long double constants, which in turn allows us to
use flds/fldl instead of fldt.

llvm-svn: 47938

all the way to float, not stopping at double.

llvm-svn: 47937

llvm-svn: 47934

llvm-svn: 47933

bug in r47928 (Int64Ty is the correct type for the constant
pool entry here) and removes the asserts, now that the code
is capable of handling i128.

llvm-svn: 47932

For x86, if sse2 is available, it's not a good idea since cvtss2sd is slower than a movsd load and it prevents load folding. On x87, it's important to shrink fp constant since fldt is very expensive.

llvm-svn: 47931

llvm-svn: 47929

llvm-svn: 47928

findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies.

llvm-svn: 47927

llvm-svn: 47924

llvm-svn: 47922

llvm-svn: 47918

class (cosmetic).  First piece of byval implementation;
this doesn't work yet.  No functional change.

llvm-svn: 47917

llvm-svn: 47916

llvm-svn: 47915

llvm-svn: 47911

llvm-svn: 47909

llvm-svn: 47908

Update test to use multiple return value directly, instead of relying on -sretpromotion.

llvm-svn: 47907

llvm-svn: 47906

llvm-svn: 47904

llvm-svn: 47903

llvm-svn: 47900

llvm-svn: 47899

llvm-svn: 47897

new function and new call sites.

llvm-svn: 47896

llvm-svn: 47895

llvm-svn: 47892

llvm-svn: 47890

llvm-svn: 47889

llvm-svn: 47888

llvm-svn: 47886

The basic idea is that all these algorithms are computing the longest paths from the root node or to the exit node. Therefore the existing implementation that uses and iterative and potentially
exponential algorithm was changed to a well-known graph algorithm based on dynamic programming. It has a linear run-time.

llvm-svn: 47884

Refactor ExpandConstantFP so it can optimize load from constpool of types larger than f64 into extload from smaller types.

llvm-svn: 47883

llvm-svn: 47882

llvm-svn: 47881