@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -992,6 +993,8 @@ void AMDGPUPassConfig::addIRPasses() {
if (isPassEnabled(EnableImageIntrinsicOptimizer))
addPass(createAMDGPUImageIntrinsicOptimizerPass(&TM));
+ addPass(createExpandVariadicsPass(ExpandVariadicsMode::Lowering));
JonChesterfield wrot
https://github.com/Pierre-vh approved this pull request.
LGTM if a kill switch is added, I would wait a day more before landing in case
anyone else has concerns
https://github.com/llvm/llvm-project/pull/93362
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@@ -992,6 +993,8 @@ void AMDGPUPassConfig::addIRPasses() {
if (isPassEnabled(EnableImageIntrinsicOptimizer))
addPass(createAMDGPUImageIntrinsicOptimizerPass(&TM));
+ addPass(createExpandVariadicsPass(ExpandVariadicsMode::Lowering));
Pierre-vh wrote:
Pl
https://github.com/Pierre-vh edited
https://github.com/llvm/llvm-project/pull/93362
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@@ -8,10 +8,15 @@ add_custom_target(libc-long-running-tests)
add_subdirectory(UnitTest)
-if(LIBC_TARGET_OS_IS_GPU AND
jhuber6 wrote:
Done
https://github.com/llvm/llvm-project/pull/93362
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JonChesterfield wrote:
If there's no va_start and we're optimising there's no work to do. Otherwise
when lowering we still transform declarations (which have no basic blocks) and
calls to unknown pointers, so that separate compilation works. That's why
knowing it's the whole program would be u
jhuber6 wrote:
> Early exit on lack of va_start will be incorrect in the lowering case, which
> is the only one enabled by default. I believe existing comments are all
> addressed.
Figured if there's no `va_start` there's nothing for the pass to do anyway.
> Precommit the cmake diagnostic twe
@@ -8,10 +8,15 @@ add_custom_target(libc-long-running-tests)
add_subdirectory(UnitTest)
-if(LIBC_TARGET_OS_IS_GPU AND
JonChesterfield wrote:
This is helpful for me working out why libc isn't running tests but otherwise
unrelated to this PR, I'll drop it fro
JonChesterfield wrote:
Early exit on lack of va_start will be incorrect in the lowering case, which is
the only one enabled by default. I believe existing comments are all addressed.
Precommit the cmake diagnostic tweak sounds good, would you like to land that?
https://github.com/llvm/llvm-pro
@@ -8,10 +8,15 @@ add_custom_target(libc-long-running-tests)
add_subdirectory(UnitTest)
-if(LIBC_TARGET_OS_IS_GPU AND
jhuber6 wrote:
Can we precommit or move this to a separate patch
https://github.com/llvm/llvm-project/pull/93362
__
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https://github.com/llvm/llvm-project/pull/93362
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https://github.com/jhuber6 commented:
Overall I think this is good. Address the existing comments and I think we
should be able to land it. Potentially we should be able to check for the
existence of `va_start` in the module to early-exit like you said, which will
keep functional changes to a
JonChesterfield wrote:
We can check for the va_start which is a good approximation, but there can be a
variadic function pointer from another module and the only place that would
show up is a call instruction, and the only way to find that is enumeration.
Amdgpu can somewhat cheat using the wh
jhuber6 wrote:
> An offline suggestion from Pierre is that this should early-exit if there are
> no variadic functions in the module. That's a good thing, I'd like to
> consider it another of the increase-complexity-for-decreased-compile-time to
> implement after something has landed.
I thoug
JonChesterfield wrote:
An offline suggestion from Pierre is that this should early-exit if there are
no variadic functions in the module. That's a good thing, I'd like to consider
it another of the increase-complexity-for-decreased-compile-time to implement
after something has landed.
https:/
JonChesterfield wrote:
Thanks @Pierre-vh, I think those are all applied. Also removed llvm:: from some
other places, and remembered that llvm doesn't like the if () {braces} which
are so useful for git merge not introducing bugs so removed the majority of
those as well. Feel confident enough a
https://github.com/JonChesterfield edited
https://github.com/llvm/llvm-project/pull/93362
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@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
https://github.com/JonChesterfield edited
https://github.com/llvm/llvm-project/pull/93362
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@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
JonChesterfield wrote:
Majority of review comments applied. Merged 94083 (with apologies to Matt) and
rebased.
I claim the top level strategy of "turn ... into va_list then fix up known call
sites" is a reasonable strategy for optimising variadic functions. The target
specific quirks being ab
https://github.com/JonChesterfield edited
https://github.com/llvm/llvm-project/pull/93362
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@@ -33,6 +33,7 @@ static_library("IPO") {
"DeadArgumentElimination.cpp",
"ElimAvailExtern.cpp",
"EmbedBitcodePass.cpp",
+"ExpandVariadics.cpp",
JonChesterfield wrote:
Nice, I did not know what. I am indeed not a BUILD.gn user.
https://github.c
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -0,0 +1,1037 @@
+//===-- ExpandVariadicsPass.cpp *- C++ -*-=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apach
@@ -33,6 +33,7 @@ static_library("IPO") {
"DeadArgumentElimination.cpp",
"ElimAvailExtern.cpp",
"EmbedBitcodePass.cpp",
+"ExpandVariadics.cpp",
efriedma-quic wrote:
There's a bot that updates the gn files automatically... so unless you're
buil
https://github.com/efriedma-quic commented:
Left some review comments. Please land
https://github.com/llvm/llvm-project/pull/94083 first.
I agree it makes sense to land this in essentially its current form; it seems
to be the right algorithm.
https://github.com/llvm/llvm-project/pull/93362
_
https://github.com/efriedma-quic edited
https://github.com/llvm/llvm-project/pull/93362
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jhuber6 wrote:
I can confirm that it passes the tests against the `libc` targets, namely basic
`stdarg.h` implementations and `sprintf`.
https://github.com/llvm/llvm-project/pull/93362
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JonChesterfield wrote:
I wish to ship this as-is. This patch is carefully constructed to be zero risk
and landing it significantly improves the chances of zero-overhead varargs
shipping. This revision passes the amdgpu libc tests. The tests are fragile to
seemingly trivial changes to the IR ge
@@ -10,6 +10,50 @@
#include "test/UnitTest/Test.h"
+#include "src/__support/OSUtil/io.h"
+#include "src/__support/integer_to_string.h"
+using namespace LIBC_NAMESPACE;
+
+namespace {
+
+void nl() { write_to_stderr("\n"); }
+void dump(const char *s) {
+ write_to_stderr(s);
+
@@ -10,6 +10,50 @@
#include "test/UnitTest/Test.h"
+#include "src/__support/OSUtil/io.h"
+#include "src/__support/integer_to_string.h"
+using namespace LIBC_NAMESPACE;
+
+namespace {
+
+void nl() { write_to_stderr("\n"); }
+void dump(const char *s) {
+ write_to_stderr(s);
+
JonChesterfield wrote:
I've spawned #93974 in case we can land the target independent part in parallel
with me trying to debug the amdgpu/libc error. Maintaining different branches
with different variations on what subset is implemented is confusing me quite a
lot and leads to reviewers seeing
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