llvm-svn: 14151

llvm-svn: 14150

llvm-svn: 14149

comparisons.  In an 'isunordered' predicate, which looks like this at
the LLVM level:

        %a = call bool %llvm.isnan(double %X)
        %b = call bool %llvm.isnan(double %Y)
        %COM = or bool %a, %b

We used to generate this code:

        fxch %ST(1)
        fucomip %ST(0), %ST(0)
        setp %AL
        fucomip %ST(0), %ST(0)
        setp %AH
        or %AL, %AH

With this patch, we generate this code:

        fucomip %ST(0), %ST(1)
        fstp %ST(0)
        setp %AL

Which should make alkis happy.  Tested as X86/compare_folding.llx:test1

llvm-svn: 14148

for each 'COM =' line.

llvm-svn: 14147

llvm-svn: 14146

llvm-svn: 14145

we can get rid of the FpUCOM/FpUCOMi pseudo instructions, which makes stuff simpler
and faster.

llvm-svn: 14144

twoarg cases.

llvm-svn: 14143

llvm-svn: 14142

testcase

llvm-svn: 14141

llvm-svn: 14140

This makes the code much simpler, and the two cases really do belong apart.
Once we do it, it's pretty obvious how flawed the logic was for A != A case,
so I fixed it (fixing PR369).

This also uses freeStackSlotAfter instead of inserting an fxchg then
popStackAfter'ing in the case where there is a dead result (unlikely, but
possible), producing better code.

llvm-svn: 14139

doesn't break on machines with limited command line lengths.

llvm-svn: 14138

llvm-svn: 14137

llvm-svn: 14136

llvm-svn: 14135

llvm-svn: 14134

  isunordered(X, Y) === isnan(X) | isnan(Y)

Remove isunordered, add isnan.

Modernize testcase

llvm-svn: 14133

  isunordered(X, Y) === isnan(X) | isnan(Y)

Remove isunordered, add isnan.

llvm-svn: 14132

llvm-svn: 14131

llvm-svn: 14130

llvm-svn: 14129

them into the constant pool.

llvm-svn: 14128

llvm-svn: 14127

llvm-svn: 14126

needed for analysis of individual functions.

llvm-svn: 14125

a PhiNode or not. Needed by Bytecode Analyzer.

llvm-svn: 14124

llvm-svn: 14123

llvm-svn: 14122

llvm-svn: 14121

llvm-svn: 14120

llvm-svn: 14119

llvm-svn: 14117

llvm-svn: 14115

llvm-svn: 14114

llvm-svn: 14113

Don't match on $Filename (which will be unset) if we hit 'UNMATCHABLE:'.

llvm-svn: 14112

targets whose stack grows up.

Patch contributed by Vladimir Prus

llvm-svn: 14111

llvm-svn: 14110