[llvm] [AMDGPU] Set Convergent property for image.(getlod/sample*) intrinsics which uses WQM (PR #122908)

[Matt Arsenault via llvm-commits]

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@@ -11,7 +11,7 @@
 
 define amdgpu_ps float @sinking_img_sample() {
 main_body:
-  %i = call <3 x float> @llvm.amdgcn.image.sample.2d.v3f32.f32(i32 7, float undef, float undef, <8 x i32> undef, <4 x i32> undef, i1 false, i32 0, i32 0)
+  %i = call <3 x float> @llvm.amdgcn.image.sample.l.2d.v3f32.f32(i32 7, float undef, float undef, float undef, <8 x i32> undef, <4 x i32> undef, i1 false, i32 0, i32 0)
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arsenm wrote:

Add a new test instead of changing the operation in an old one? Presumably we should have tests for all the cases 

https://github.com/llvm/llvm-project/pull/122908