llvm-svn: 130984

Patch by Wei-Ren Chen

llvm-svn: 130980

return the pointer being dereferenced, it returns the pointee, but a call
might return the pointer itself.

llvm-svn: 130979

possibly related to cbnz formation.

llvm-svn: 130977

llvm-svn: 130967

llvm-svn: 130964

llvm-svn: 130959

llvm-svn: 130957

llvm-svn: 130955

PR9838: Fix transform introduced in r127064 to not trigger when only one side of the icmp is an exact shift.

llvm-svn: 130954

llvm-svn: 130951

llvm-svn: 130949

llvm-svn: 130947

llvm-svn: 130944

BuildSchedGraph was quadratic in the number of calls in the basic
block. After this fix, it keeps only a single call at the top of the
DefList so compile time doesn't blow up on large blocks. This reduces
postRA sched time on an external test case from 81s to 0.3s.  Although
r130800 (reduced ARM register alias defs) also partially fixes the
issue by reducing the constant overhead of checking call interference
by an order of magnitude.

Fixes <rdar://problem/7662664> very poor compile time with post RA scheduling.

llvm-svn: 130943

llvm-svn: 130942

I tested both gdb on a bootstrapped clang and and the gdb testsuite on OS X (snow leopard)
and both are happy using __eh_frame.

llvm-svn: 130937

Many LLVM tests relies on standard output stream be in the binary mode. Which is not always the case (on Windows in particular). The patch adds a test to verify that the standard output stream is actually in the binary mode.

llvm-svn: 130936

llvm-svn: 130934

llvm-svn: 130933

No test because I can't think of any way to write one that won't break quickly.

llvm-svn: 130932

llvm-svn: 130931

Avoid extra vreg copies for arguments passed in registers.  Specifically, this can make MachineCSE more effective in some cases (especially in small functions).  PR8361 / part of rdar://problem/8259436 .

llvm-svn: 130928

This should unbreak llvm-gcc-i386-linux-selfhost.

llvm-svn: 130927

llvm-svn: 130926

llvm-svn: 130925

llvm-svn: 130920

who used this flag, and it now emits CFI and doesn't emit this anymore. All
other targets left this flag "false".
<rdar://problem/8486371>

llvm-svn: 130918

llvm-svn: 130915

llvm-svn: 130914

crash.

llvm-svn: 130911

llvm-svn: 130903

filename.

llvm-svn: 130897

Joining physregs is inherently dangerous because it uses a heuristic to avoid
creating invalid code. Linear scan had an emergency spilling mechanism to deal
with those rare cases. The new greedy allocator does not.

The greedy register allocator is much better at taking hints, so this has almost
no impact on code size and quality. The few cases where it matters show up as
unit tests that now have -join-physregs enabled explicitly.

llvm-svn: 130896

llvm-svn: 130895

llvm-svn: 130894

llvm-svn: 130893

It is OK for B to be any GR8_ABCD_H superclass, the returned register class
doesn't have to map surjectively onto B.

llvm-svn: 130892

Most of these tests require a single mov instruction that can come either before
or after a 2-addr instruction. -join-physregs changes the behavior, but the
results are equivalent.

llvm-svn: 130891

llvm-svn: 130889