of LCSSA.  This results several times the number of unswitchings occurring on
tests such and timberwolfmc, unix-tbl, and ldecod.

llvm-svn: 28912

Simplify X86CompilationCallback: always align to 16-byte boundary; don't save EAX/EDX if unnecessary.

llvm-svn: 28910

code in sections other than ".text", including weak sections like ctors and
dtors.

llvm-svn: 28909

llvm-svn: 28908

llvm-svn: 28907

llvm-svn: 28906

llvm-svn: 28905

when compiling with -pedantic. Passes regression tests on Linux.

llvm-svn: 28904

llvm-svn: 28903

llvm-svn: 28902

llvm-svn: 28901

llvm-svn: 28900

Don't both with the "C" and "cc" extensions as they aren't common and they
the "C" extension conflicts with the "c" extension on operating systems
that have case insensitive file names.

llvm-svn: 28899

vtables for (e.g.) Instruction from being emitted into every .o file.

llvm-svn: 28898

llvm-svn: 28897

llvm-svn: 28896

llvm-svn: 28895

llvm-svn: 28894

llvm-svn: 28893

llvm-svn: 28892

llvm-svn: 28891

llvm-svn: 28890

llvm-svn: 28889

llvm-svn: 28888

llvm-svn: 28887

llvm-svn: 28886

void test6() {
  Y = 0xABCD0123BCDE4567;
}

into:

_test6:
        lis r2, -21555
        lis r3, ha16(_Y)
        ori r2, r2, 291
        rldicr r2, r2, 32, 31
        oris r2, r2, 48350
        ori r2, r2, 17767
        std r2, lo16(_Y)(r3)
        blr

llvm-svn: 28885

set, so disable the pattern in that case.

llvm-svn: 28884

Split imm16Shifted into a sext/zext form for 64-bit support.
Add some patterns for immediate formation.  For example, we now compile this:

static unsigned long long Y;
void test3() {
  Y = 0xF0F00F00;
}

into:

_test3:
        li r2, 3840
        lis r3, ha16(_Y)
        xoris r2, r2, 61680
        std r2, lo16(_Y)(r3)
        blr

GCC produces:

_test3:
        li r0,0
        lis r2,ha16(_Y)
        ori r0,r0,61680
        sldi r0,r0,16
        ori r0,r0,3840
        std r0,lo16(_Y)(r2)
        blr

llvm-svn: 28883

llvm-svn: 28882

llvm-svn: 28881

llvm-svn: 28880

static unsigned long long X, Y;
void test1() {
  X = Y;
}

into:

_test1:
        lis r2, ha16(_Y)
        lis r3, ha16(_X)
        ld r2, lo16(_Y)(r2)
        std r2, lo16(_X)(r3)
        blr

llvm-svn: 28879

llvm-svn: 28878

llvm-svn: 28877

llvm-svn: 28876

llvm-svn: 28875

llvm-svn: 28874

llvm-svn: 28873

llvm-svn: 28872