Require GL_EXT_samplerless_texture_functions only if needed (#5527)

* Require GL_EXT_samplerless_texture_functions only if needed

This extension is only necessary when using texture functions
on non-combined texture/samplers.

Fixes #5518

1 files changed, 18 insertions, 0 deletions

diff --git a/tests/bugs/gh-5518.slang b/tests/bugs/gh-5518.slang
new file mode 100644
index 000000000..18a987afd
--- /dev/null
+++ b/tests/bugs/gh-5518.slang
@@ -0,0 +1,18 @@
+//TEST:SIMPLE(filecheck=GLSL): -profile spirv_1_5+fragment -entry fragmentMain -target glsl
+
+// Ensure that the use of combined samplers does not needlessly require
+// GL_EXT_samplerless_texture_functions
+
+// GLSL-NOT: #extension GL_EXT_samplerless_texture_functions : require
+
+layout(binding=1) Sampler3D sampler;
+
+[shader("fragment")]
+float4 fragmentMain() : SV_Target
+{
+	int sizeX;
+	int sizeY;
+	int sizeZ;
+	sampler.GetDimensions(sizeX, sizeY, sizeZ);
+	return float4(sizeX, sizeY, sizeZ, 1.0);
+}