[clang] [llvm] [mlir] [AMDGPU] add clamp immediate operand to WMMA iu8 intrinsic (PR #171069)

[Muhammad Abdul via cfe-commits]

================
@@ -108,10 +108,16 @@ void test_amdgcn_wmma_f16_16x16x64_bf8_bf8(global v8h* 
out, v8i a, v8i b, v8h c,
 
 void test_amdgcn_wmma_i32_16x16x64_iu8(global v8i* out, v8i a, v8i b, v8i c, 
int mod)
 {
-  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(mod, a, 0, b, c, false, 
false); // expected-error {{'__builtin_amdgcn_wmma_i32_16x16x64_iu8' must be a 
constant integer}}
-  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(0, a, mod, b, c, false, 
false); // expected-error {{'__builtin_amdgcn_wmma_i32_16x16x64_iu8' must be a 
constant integer}}
-  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(0, a, 0, b, c, mod, false); // 
expected-error {{'__builtin_amdgcn_wmma_i32_16x16x64_iu8' must be a constant 
integer}}
-  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(0, a, 0, b, c, false, mod); // 
expected-error {{'__builtin_amdgcn_wmma_i32_16x16x64_iu8' must be a constant 
integer}}
+  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(mod, a, 0, b, c, false, false, 
false); // expected-error {{'__builtin_amdgcn_wmma_i32_16x16x64_iu8' must be a 
constant integer}}
+  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(0, a, mod, b, c, false, false, 
false); // expected-error {{'__builtin_amdgcn_wmma_i32_16x16x64_iu8' must be a 
constant integer}}
+  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(0, a, 0, b, c, mod, false, 
false); // expected-error {{'__builtin_amdgcn_wmma_i32_16x16x64_iu8' must be a 
constant integer}}
+  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(0, a, 0, b, c, false, mod, 
false); // expected-error {{'__builtin_amdgcn_wmma_i32_16x16x64_iu8' must be a 
constant integer}}
+  *out = __builtin_amdgcn_wmma_i32_16x16x64_iu8(0, a, 0, b, c, false, false, 
mod);
----------------
0xzre wrote:

My implementation is following just like the other WMMA/SWMMAC reuse flags, 
which are allowed to be non-literal. Though I can add `BuiltinConstantArg` on 
`SemaAMDGPU` if needed 👍 

https://github.com/llvm/llvm-project/pull/171069
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