llvm-svn: 40043

With this, the time to optimize 403.gcc is down to 15.1s.

llvm-svn: 40042

This results in a slight speedup for 403.gcc.

llvm-svn: 40040

llvm-svn: 40039

reduces the time to optimize 403.gcc from 17.6s to 16.4s.

llvm-svn: 40036

second part dominates all the blocks dominated
by original basic block. And first part dominates
second part.

llvm-svn: 40035

llvm-svn: 40034

InOperandList. This gives one piece of important information: # of results
produced by an instruction.
An example of the change:
def ADD32rr  : I<0x01, MRMDestReg, (ops GR32:$dst, GR32:$src1, GR32:$src2),
                 "add{l} {$src2, $dst|$dst, $src2}",
                 [(set GR32:$dst, (add GR32:$src1, GR32:$src2))]>;
=>
def ADD32rr  : I<0x01, MRMDestReg, (outs GR32:$dst), (ins GR32:$src1, GR32:$src2),
                 "add{l} {$src2, $dst|$dst, $src2}",
                 [(set GR32:$dst, (add GR32:$src1, GR32:$src2))]>;

llvm-svn: 40033

llvm-svn: 40030

llvm-svn: 40028

llvm-svn: 40025

This fixes PR1559.

llvm-svn: 40024

llvm-svn: 40022

Use MOV instead of LEA to restore ESP if callee-saved frame size is 0; if previous instruction updates esp, fold it in.

llvm-svn: 40018

end of a BasicBlock and have an alignment parameter.

llvm-svn: 40016

and stores that have a specified alignment of less than 16 bytes now use
instructions that support misaligned memory references.

llvm-svn: 40015

would result in calling realloc() on a null pointer.  Instead, if we encounter
this situation, make a normal call to malloc().

llvm-svn: 40014

alignment is equal to the stack alignment.

llvm-svn: 40004

llvm-svn: 39998

llvm-svn: 39984

llvm-svn: 39979

llvm-svn: 39978

llvm-svn: 39977

Missed the case where alloca is used but the stack size (not including callee-saved portion) is zero. Thanks Dan.

llvm-svn: 39974

llvm-svn: 39971

llvm-svn: 39967

llvm-svn: 39962

having that implementation file #include <cstdlib>.

llvm-svn: 39952

beyond the end of an alloca to make FastDSE faster and more aggressive.

llvm-svn: 39945

dead stores on 400.perlbench.

llvm-svn: 39929

llvm-svn: 39926

llvm-gcc build to succeed. Without this change it fails in libstdc++
compilation. This causes no regressions in dejagnu tests. However, 
someone who knows this code better might want to review it.

llvm-svn: 39924

have an error, and refector out the code for binary operators into
ConstantFoldBinaryFP and use it for all binary floating-point operations
which may have an error. These functions still rely exclusively on errno
to detect errors though.

llvm-svn: 39923

llvm-svn: 39921

llvm-svn: 39896

llvm-svn: 39894

Always pass the constant as the second parameter to HowManyLessThans.

Remove obsolete "isSigned" parameter.

llvm-svn: 39893

First teach instcombine that sign bit checks only demand the 
sign bit, this allows simplify demanded bits to hack on 
expressions better.

Second, teach instcombine that ashr is useless if only the
sign bit is demanded.

llvm-svn: 39880

(X << 31) <s 0  --> (X&1) != 0

This happens dozens of times in the CFE.

llvm-svn: 39879

llvm-svn: 39857