Commit Graph

15 Commits

Author SHA1 Message Date
Tom Stellard 348273df97 R600: Recommit 199842: Add work-around for the CF stack entry HW bug
The unit test is now disabled on non-asserts builds.

The CF stack can be corrupted if you use CF_ALU_PUSH_BEFORE,
CF_ALU_ELSE_AFTER, CF_ALU_BREAK, or CF_ALU_CONTINUE when the number of
sub-entries on the stack is greater than or equal to the stack entry
size and sub-entries modulo 4 is either 0 or 3 (on cedar the bug is
present when number of sub-entries module 8 is either 7 or 0)

We choose to be conservative and always apply the work-around when the
number of sub-enries is greater than or equal to the stack entry size,
so that we can safely over-allocate the stack when we are unsure of the
stack allocation rules.

reviewed-by: Vincent Lejeune <vljn at ovi.com>
llvm-svn: 199905
2014-01-23 16:18:02 +00:00
Tom Stellard 31e16388d7 Revert "R600: Add work-around for the CF stack entry HW bug"
This reverts commit 35b8331cad6eb512a2506adbc394201181da94ba.

The -debug-only flag for llc doesn't appear to be available in
all build configurations.

llvm-svn: 199845
2014-01-22 22:20:54 +00:00
Tom Stellard e89373e062 R600: Add work-around for the CF stack entry HW bug
The CF stack can be corrupted if you use CF_ALU_PUSH_BEFORE,
CF_ALU_ELSE_AFTER, CF_ALU_BREAK, or CF_ALU_CONTINUE when the number of
sub-entries on the stack is greater than or equal to the stack entry
size and sub-entries modulo 4 is either 0 or 3 (on cedar the bug is
present when number of sub-entries module 8 is either 7 or 0)

We choose to be conservative and always apply the work-around when the
number of sub-enries is greater than or equal to the stack entry size,
so that we can safely over-allocate the stack when we are unsure of the
stack allocation rules.

reviewed-by: Vincent Lejeune <vljn at ovi.com>
llvm-svn: 199842
2014-01-22 21:55:46 +00:00
Tom Stellard 8c347b024e R600: Add wavefront size property to the subtargets v2
v2:
  - Initialize wavefront size to 0

reviewed-by: Vincent Lejeune <vljn at ovi.com>
llvm-svn: 199838
2014-01-22 21:55:40 +00:00
Rafael Espindola 50712a456d Change the default of AsmWriterClassName and isMCAsmWriter.
llvm-svn: 196065
2013-12-02 04:55:42 +00:00
Tom Stellard 66df8a2c0a R600: Enable the IR structurizer by default
llvm-svn: 195031
2013-11-18 19:43:44 +00:00
Tom Stellard 783893a893 R600: Add a SubtargetFeatture for disabling the ifcvt pass.
This is useful when writing test cases for the AMDIL structurizer.

llvm-svn: 195029
2013-11-18 19:43:33 +00:00
Tom Stellard f1e3f77507 R600: Use lower-case for EnableIRStructurizer feature
llc converts all values passed to -mattr= to lowercase, so this
enables us to toggle this feature when using llc.

llvm-svn: 195028
2013-11-18 19:43:29 +00:00
Tom Stellard 6e1ee476ab R600/SI: Add compute support for CI v2
v2:
  - Fix LDS size calculation

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
llvm-svn: 193621
2013-10-29 16:37:28 +00:00
Tom Stellard ed0ceec1c1 R600: Use StructurizeCFGPass for non SI targets
StructurizeCFG pass allows to make complex cfg reducible ; it allows a lot of
shader from shadertoy (which exhibits complex control flow constructs) to works
correctly with respect to CFG handling (and allow us to detect potential bug in
other part of the backend).

We provide a cmd line argument to disable the pass for debug purpose.

Patch by: Vincent Lejeune

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 192363
2013-10-10 17:11:12 +00:00
Tom Stellard a6c6e1bfc2 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>
llvm-svn: 183566
2013-06-07 20:37:48 +00:00
Tom Stellard 3498e4ff1d 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

llvm-svn: 183560
2013-06-07 20:28:55 +00:00
Tom Stellard 99792774a4 R600: Move Subtarget feature definitions into AMDGPU.td
This is the convention used by the other targets.

Reviewed-by: Vincent Lejeune <vljn@ovi.com>
llvm-svn: 183559
2013-06-07 20:28:49 +00:00
Christian Konig 2c8f6d5376 R600/SI: add proper formal parameter handling for SI
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 176623
2013-03-07 09:03:52 +00:00
Tom Stellard 75aadc2813 Add R600 backend
A new backend supporting AMD GPUs: Radeon HD2XXX - HD7XXX

llvm-svn: 169915
2012-12-11 21:25:42 +00:00