Added support to fold X86 load / store instructions. This allow rematerialized loads to be folded into their uses.

llvm-svn: 41599

llvm-svn: 41510

latest EH changes, and in any case it is hard to
imagine how the original bug could be reintroduced.

llvm-svn: 41497

resulting in zero matches, while llvm-gcc-4.1 manages to
remove one pointless selector changing the number of matches.

llvm-svn: 41494

offset needs to be adjusted in this test.

llvm-svn: 41490

to not alias each other, it can be translated as an llvm.memcpy.

llvm-svn: 41489

Coping 100MB array (after a warmup) shows that glibc 2.6.1 implementation on
x86-64 (core 2) is 30% faster (from 0.270917s to 0.188079s)

llvm-svn: 41479

Don't promote volatile loads/stores. This is needed (for example) to handle setjmp/longjmp properly.
This fixes PR1520.

llvm-svn: 41461

llvm-svn: 41389

know how to handle them.  This fixes 
test/CodeGen/Generic/asm-large-immediate.ll

llvm-svn: 41388

While calculating upper loop bound for first loop and lower loop bound for second loop, take care of edge cases.

llvm-svn: 41387

llvm.cttz.i64 because of the declaration of
the intrinsic.  Also, emit-llvm is automatic
and doesn't need to be specified.

llvm-svn: 41326

llvm-svn: 41289

llvm-svn: 41268

llvm-svn: 41266

llvm-svn: 41194

llvm-svn: 41187

llvm-svn: 41164

llvm-svn: 41146

llvm-svn: 41135

Update test: dynamic_stackalloc size *must* be rounded to ensure stack ptr be left in a valid state.

llvm-svn: 41134

llvm-svn: 41123

the standard error.

llvm-svn: 41116

Fix PR1287.

llvm-svn: 41112

llvm-svn: 41110

llvm-svn: 41101

llvm-svn: 41100

llvm-svn: 41099

regex used to convert all the others because the first '|' was on a
separate line.

llvm-svn: 41098

llvm-svn: 41097

llvm-svn: 41087

llvm-svn: 41085

llvm-svn: 41073

using the count script instead of wc -l

llvm-svn: 41072

llvm-svn: 41070

llvm-svn: 41068

llvm-svn: 41061

see if the base register is already occupied before assuming it can be
used. This fixes bogus code generation in the accompanying testcase.

llvm-svn: 41049

llvm-svn: 41048

llvm-svn: 41047