R600: Don't compare iterators of different maps.

Found be libstdc's debug mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183549 91177308-0d34-0410-b5e6-96231b3b80d8
ARM FastISel integer sext/zext improvements

My recent ARM FastISel patch exposed this bug:
  http://llvm.org/bugs/show_bug.cgi?id=16178
The root cause is that it can't select integer sext/zext pre-ARMv6 and
asserts out.

The current integer sext/zext code doesn't handle other cases gracefully
either, so this patch makes it handle all sext and zext from i1/i8/i16
to i8/i16/i32, with and without ARMv6, both in Thumb and ARM mode. This
should fix the bug as well as make FastISel faster because it bails to
SelectionDAG less often. See fastisel-ext.patch for this.

fastisel-ext-tests.patch changes current tests to always use reg-imm AND
for 8-bit zext instead of UXTB. This simplifies code since it is
supported on ARMv4t and later, and at least on A15 both should perform
exactly the same (both have exec 1 uop 1, type I).

2013-05-31-char-shift-crash.ll is a bitcode version of the above bug
16178 repro.

fast-isel-ext.ll tests all sext/zext combinations that ARM FastISel
should now handle.

Note that my ARM FastISel enabling patch was reverted due to a separate
failure when dealing with MCJIT, I'll fix this second failure and then
turn FastISel on again for non-iOS ARM targets.

I've tested "make check-all" on my x86 box, and "lnt test-suite" on A15
hardware.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183551 91177308-0d34-0410-b5e6-96231b3b80d8
Add a backend option to warn on a given stack size limit.
Option: -mllvm -warn-stack-size=<limit>
Output (if limit is exceeded):
warning: Stack size limit exceeded (<actual size>) in <functionName>.

The longer term plan is to hook that to a clang warning.
PR:4072
<rdar://problem/13987214>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183552 91177308-0d34-0410-b5e6-96231b3b80d8
Add more explicit link targets to headers in LangRef.rst


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183555 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Remove unnecessary include

Reviewed-by: Vincent Lejeune <vljn@ovi.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183558 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Move Subtarget feature definitions into AMDGPU.td

This is the convention used by the other targets.

Reviewed-by: Vincent Lejeune <vljn@ovi.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183559 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Fix the fetch limits for R600 generation GPUs

Reviewed-by: Vincent Lejeune <vljn@ovi.com>

https://bugs.freedesktop.org/show_bug.cgi?id=64257

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183560 91177308-0d34-0410-b5e6-96231b3b80d8
Don't cache the instruction and register info from the TargetMachine, because
the internals of TargetMachine could change.

No functionality change intended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183561 91177308-0d34-0410-b5e6-96231b3b80d8
[docs] Add link to Microsoft PE/COFF Spec.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183562 91177308-0d34-0410-b5e6-96231b3b80d8
Don't cache the instruction and register info from the TargetMachine, because
the internals of TargetMachine could change.

No functionality change intended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183565 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Rework subtarget info and remove AMDILDevice classes

This should simplify the subtarget definitions and make it easier to
add new ones.

Reviewed-by: Vincent Lejeune <vljn@ovi.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183566 91177308-0d34-0410-b5e6-96231b3b80d8
Don't cache the instruction and register info from the TargetMachine, because
the internals of TargetMachine could change.

No functionality change intended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183567 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Fix calculation of stack offset in AMDGPUFrameLowering

We weren't computing structure size correctly and we were relying on
the original alloca instruction to compute the offset, which isn't
always reliable.

Reviewed-by: Vincent Lejeune <vljn@ovi.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183568 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused c'tor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183570 91177308-0d34-0410-b5e6-96231b3b80d8