Jonas Paulsson bd9bd9e500 [Stack realignment] Handling of aligned allocas. ...

This patch implements dynamic realignment of stack objects for targets
with a non-realigned stack pointer. Behaviour in FunctionLoweringInfo
is changed so that for a target that has StackRealignable set to
false, over-aligned static allocas are considered to be variable-sized
objects and are handled with DYNAMIC_STACKALLOC nodes.

It would be good to group aligned allocas into a single big alloca as
an optimization, but this is yet todo.

SystemZ benefits from this, due to its stack frame layout.

New tests SystemZ/alloca-03.ll for aligned allocas, and
SystemZ/alloca-04.ll for "no-realign-stack" attribute on functions.

Review and help from Ulrich Weigand and Hal Finkel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254227 91177308-0d34-0410-b5e6-96231b3b80d8

2015-11-28 11:02:32 +00:00

..

AArch64

[CodeGenPrepare] Create more extloads and fewer ands

2015-11-20 22:34:39 +00:00

AMDGPU

AMDGPU: Add llvm.amdgcn.dispatch.ptr intrinsic

2015-11-26 00:43:29 +00:00

ARM

[ARM] Generate ABI_optimization_goals build attribute, as described in the ARM ARM.

2015-11-27 15:30:51 +00:00

BPF

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

CPP

Fix CPP Backend for GEP API changes for opaque pointer types

2015-09-08 18:42:29 +00:00

Generic

Let SelectionDAG start to use probability-based interface to add successors.

2015-11-24 08:51:23 +00:00

Hexagon

[Hexagon] Hexagon V60 HVX intrinsic defintions

2015-11-26 16:54:33 +00:00

Inputs

DI: Reverse direction of subprogram -> function edge.

2015-11-05 22:03:56 +00:00

Mips

[mips][ias] Explicitly disable IAS on tests that depend on not assembling.

2015-11-26 11:23:03 +00:00

MIR

MachineVerifier: Add missing linebreak

2015-11-09 23:59:29 +00:00

MSP430

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

NVPTX

Have a single way for creating unique value names.

2015-11-22 00:16:24 +00:00

PowerPC

[PowerPC] Don't generate mfocrf on the e500mc

2015-11-25 10:14:31 +00:00

SPARC

Drop assert that a call with struct return goes to a function with sret

2015-10-21 20:05:01 +00:00

SystemZ

[Stack realignment] Handling of aligned allocas.

2015-11-28 11:02:32 +00:00

Thumb

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

Thumb2

Fix test case label check

2015-11-20 20:24:49 +00:00

WebAssembly

[WebAssembly] Fix inline asm support for i64 operands.

2015-11-25 22:28:50 +00:00

WinEH

[WinEH] Disable most forms of demotion

2015-11-19 23:23:33 +00:00

X86

[X86][FMA] Begun adding AVX512 FMA tests

2015-11-26 20:53:28 +00:00

XCore

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00