[clang] [llvm] [AMDGPU] Add per-kernel kernarg preload count (PR #211059)

[Aaron Ballman via llvm-commits]

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@@ -45,6 +45,10 @@ __attribute__((amdgpu_num_vgpr(64))) // expected-no-diagnostics
 __global__ void num_vgpr_64() {
 // CHECK: define{{.*}} amdgpu_kernel void @_Z11num_vgpr_64v() [[NUM_VGPR_64:#[0-9]+]]
 }
+__attribute__((amdgpu_kernarg_preload_count(2))) // expected-no-diagnostics
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AaronBallman wrote:

I see this pattern is used elsewhere in the test but FWIW, `// expected-no-diagnostics` is confusing because there's no `-verify` on the `RUN` line and that's the usual comment to check that. That we repeat it all over the test file is a bit odd, the comment doesn't really help clarify anything.

(Might be worth stripping all those comments as an NFC change.)

https://github.com/llvm/llvm-project/pull/211059