llvm-svn: 156579

Patch by Jack Carter.

llvm-svn: 156577

llvm-svn: 156576

llvm-svn: 156575

Prioritize the instruction that comes closest to keeping pressure
under the target's limit. Then prioritize instructions that avoid
increasing the max pressure in the scheduled region. The max pressure
heuristic is a tad aggressive. Later I'll fix it to consider the
unscheduled pressure as well.

WIP: This is mostly functional but untested and not likely to do much good yet.
llvm-svn: 156574

llvm-svn: 156573

llvm-svn: 156572

llvm-svn: 156571

llvm-svn: 156569

llvm-svn: 156568

Added getMaxExcessUpward/DownwardPressure. They somewhat abuse the
tracker by speculatively handling an instruction out of order. But it
is convenient for now. In the future, we will cache each instruction's
pressure contribution to make this efficient.

llvm-svn: 156561

llvm-svn: 156560

llvm-svn: 156558

This commit broke an external linux bot and gave a compile-time warning.

llvm-svn: 156556

of recursion, to avoid excessive stack usage on deep expressions.

llvm-svn: 156554

llvm-svn: 156553

This patch will optimize the following cases:
  sub r1, r3 | sub r1, imm
  cmp r3, r1 or cmp r1, r3 | cmp r1, imm
  bge L1

TO
  subs r1, r3
  bge  L1 or ble L1

If the branch instruction can use flag from "sub", then we can replace
"sub" with "subs" and eliminate the "cmp" instruction.

rdar: 10734411
llvm-svn: 156550

Instruction::IsIdenticalToWhenDefined.

This manifested itself when inlining two calls to the same function.  The 
inlined function had a switch statement that returned one of a set of 
global variables.  Without this modification, the two phi instructions that 
chose values from the branches of the switch instruction inlined from the 
callee were considered equivalent and jump-threading replaced a load for the 
first switch value with a phi selecting from the second switch, thereby 
producing incorrect code.

This patch has been tested with "make check-all", "lnt runteste nt", and 
llvm self-hosted, and on the original program that had this problem, 
wireshark.

<rdar://problem/11025519>

llvm-svn: 156548

llvm-svn: 156541

llvm-svn: 156540

Starting r155461 we are able to select patterns for vbroadcast even when the load op is used by other users.

Fix PR11900.

llvm-svn: 156539

Patch by Yury Mikhaylov <yury.mikhaylov@gmail.com>.

llvm-svn: 156523

end of a basic block if there's no store.

llvm-svn: 156520

refactor code a bit to enable future changes to support run-time information
add support to compute allocation sizes at run-time if penalty > 1 (e.g., malloc(x), calloc(x, y), and VLAs)

llvm-svn: 156515

llvm-svn: 156494

llvm-svn: 156492

For the Family 6 switch in sys::getHostCPUName, an unrecognized model was
reported as "i686".  That's a really bad default since it means that new
CPUs will be treated as if they can only use 32-bit code.  This just looks
at the cpuid extended feature flag for 64 bit support, and if that is set,
it uses a default x86-64 cpu.  Similar logic is already used for the Family
15 code.  <rdar://problem/11314502>

llvm-svn: 156486

llvm-svn: 156484

This new function provides a way to get the iOS version number from ios triples.
Part of rdar://11409204

llvm-svn: 156483

This lets you save the textual representation of the LLVM IR to a file.
Before this patch it could only be printed to STDERR from llvm-c.

Patch by Carlo Kok!

llvm-svn: 156479

change the objectsize intrinsic signature: add a 3rd parameter to denote the maximum runtime performance penalty that the user is willing to accept.
This commit only adds the parameter. Code taking advantage of it will follow.

llvm-svn: 156473

Patch by Andrew Wilkins!

llvm-svn: 156469

llvm-svn: 156466

llvm-svn: 156460

The getPointerRegClass() hook will return GR32_TC, or whatever is
appropriate for the current function.

Patch by Yiannis Tsiouris!

llvm-svn: 156459

allocas.

llvm-svn: 156458

llvm-svn: 156457

llvm-svn: 156456

llvm-svn: 156445

PR12731.  Patch by Meador Inge!

llvm-svn: 156444