Fix race-condition and visual artifacts issues (#4152)

* Fix race-condition and visual artifacts issues

In PerformanceProfiler::getProfiler() we return a static object
for the profiler implementation, this is not thread-safe, so change
it to thead_local.

There is still some visual artifacts when using slang as the shading
language. We don't know the root cause yet, but found out it's related
to our loop inversion algorithm. So stage this feature for now, and turn
it into an internal option and default off. We will re-enable it after
more investigation on this optimization.

File an new issue 4151 to track it.

* Add '-loop-inversion' to the few tests

4 files changed, 8 insertions, 8 deletions

diff --git a/tests/autodiff/path-tracer/pt-loop.slang b/tests/autodiff/path-tracer/pt-loop.slang
index 2e865b80a..ac8bf763d 100644
--- a/tests/autodiff/path-tracer/pt-loop.slang
+++ b/tests/autodiff/path-tracer/pt-loop.slang
@@ -1,7 +1,7 @@
 //Tests automatic synthesis of Differential type requirement.
 
-//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
-//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type -Xslang -loop-inversion
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type -Xslang -loop-inversion
 
 //TEST_INPUT:ubuffer(data=[0 0 0], stride=4):out,name=outputBuffer
 RWStructuredBuffer<float> outputBuffer;
diff --git a/tests/autodiff/reverse-while-loop-2.slang b/tests/autodiff/reverse-while-loop-2.slang
index 9ad9ac466..70b9d5a13 100644
--- a/tests/autodiff/reverse-while-loop-2.slang
+++ b/tests/autodiff/reverse-while-loop-2.slang
@@ -1,6 +1,6 @@
-//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
-//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
-//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type -Xslang -loop-inversion
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type -Xslang -loop-inversion
+//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj -Xslang -loop-inversion
 
 //TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
 RWStructuredBuffer<float> outputBuffer;
diff --git a/tests/cross-compile/loop-attribs.slang b/tests/cross-compile/loop-attribs.slang
index 4336698c0..dca3f2331 100644
--- a/tests/cross-compile/loop-attribs.slang
+++ b/tests/cross-compile/loop-attribs.slang
@@ -1,7 +1,7 @@
 // loop-attribs.slang
 // Test that loop attributes are correctly emitted to the resulting HLSL.
 
-//TEST:CROSS_COMPILE:-target dxil-assembly  -entry main -stage fragment -profile sm_6_0 
+//TEST:CROSS_COMPILE:-target dxil-assembly  -entry main -stage fragment -profile sm_6_0 -loop-inversion
 
 float4 main() : SV_Target
 {
@@ -16,4 +16,4 @@ float4 main() : SV_Target
         sum += float(j);
 
     return float4(sum, 0, 0, 0);
-}
\ No newline at end of file
+}
diff --git a/tests/ir/loop-inversion.slang b/tests/ir/loop-inversion.slang
index 7e218a62a..7611c4062 100644
--- a/tests/ir/loop-inversion.slang
+++ b/tests/ir/loop-inversion.slang
@@ -1,4 +1,4 @@
-//TEST():SIMPLE(filecheck=CHECK):-entry computeMain -stage compute -line-directive-mode none -target hlsl
+//TEST():SIMPLE(filecheck=CHECK):-entry computeMain -stage compute -line-directive-mode none -target hlsl -loop-inversion
 //TEST(compute):COMPARE_COMPUTE(filecheck-buffer=OUT):-shaderobj -output-using-type
 //TEST(compute):COMPARE_COMPUTE(filecheck-buffer=OUT):-dx12 -use-dxil -shaderobj -output-using-type
 //TEST(compute):COMPARE_COMPUTE(filecheck-buffer=OUT):-cpu -shaderobj -output-using-type