[MLIR] Fix gpu.launch attribution argument printing (llvm#161408)

This was broken and never tested.
Not only this could crash for stack-use-after-scope, but it also would
have printed something like:

```
value <block argument> of type 'memref<7x8xf64, #gpu.address_space<workgroup>>' at index: 12
```

insted of the SSA value.

It turns out the gpu.func already have a very similar helper that we can
reuse here.

Fixes llvm#161394

Author: joker-eph

mlir/lib/Dialect/GPU/IR/GPUDialect.cpp

@@ -535,17 +535,26 @@ parseAttributions(OpAsmParser &parser, StringRef keyword,
                                   /*allowType=*/true);
 }
 
-/// Prints a GPU function memory attribution.
 static void printAttributions(OpAsmPrinter &p, StringRef keyword,
-                              ArrayRef<BlockArgument> values) {
+                              ArrayRef<BlockArgument> values,
+                              ArrayAttr attributes = {}) {
   if (values.empty())
     return;
 
-  auto printBlockArg = [](BlockArgument v) {
-    return llvm::formatv("{} : {}", v, v.getType());
-  };
-  p << ' ' << keyword << '('
-    << llvm::interleaved(llvm::map_range(values, printBlockArg)) << ')';
+  p << ' ' << keyword << '(';
+  llvm::interleaveComma(
+      llvm::enumerate(values), p, [&p, attributes](auto pair) {
+        BlockArgument v = pair.value();
+        p << v << " : " << v.getType();
+
+        size_t attributionIndex = pair.index();
+        DictionaryAttr attrs;
+        if (attributes && attributionIndex < attributes.size())
+          attrs = llvm::cast<DictionaryAttr>(attributes[attributionIndex]);
+        if (attrs)
+          p.printOptionalAttrDict(attrs.getValue());
+      });
+  p << ')';
 }
 
 /// Verifies a GPU function memory attribution.
@@ -1649,28 +1658,6 @@ ParseResult GPUFuncOp::parse(OpAsmParser &parser, OperationState &result) {
   return parser.parseRegion(*body, entryArgs);
 }
 
-static void printAttributions(OpAsmPrinter &p, StringRef keyword,
-                              ArrayRef<BlockArgument> values,
-                              ArrayAttr attributes) {
-  if (values.empty())
-    return;
-
-  p << ' ' << keyword << '(';
-  llvm::interleaveComma(
-      llvm::enumerate(values), p, [&p, attributes](auto pair) {
-        BlockArgument v = pair.value();
-        p << v << " : " << v.getType();
-
-        size_t attributionIndex = pair.index();
-        DictionaryAttr attrs;
-        if (attributes && attributionIndex < attributes.size())
-          attrs = llvm::cast<DictionaryAttr>(attributes[attributionIndex]);
-        if (attrs)
-          p.printOptionalAttrDict(attrs.getValue());
-      });
-  p << ')';
-}
-
 void GPUFuncOp::print(OpAsmPrinter &p) {
   p << ' ';
   p.printSymbolName(getName());

mlir/test/Dialect/GPU/ops.mlir

@@ -68,6 +68,31 @@ module attributes {gpu.container_module} {
     return
   }
 
+  // CHECK-LABEL: func @launch_with_attributions(
+  func.func @launch_with_attributions(%blk : index, %thrd : index, %float : f32, %data : memref<?xf32,1>) {
+    // CHECK: gpu.launch
+    gpu.launch blocks(%bx, %by, %bz) in (%grid_x = %blk, %grid_y = %blk, %grid_z = %blk)
+               threads(%tx, %ty, %tz) in (%block_x = %thrd, %block_y = %thrd, %block_z = %thrd)
+    // CHECK-SAME: workgroup(%[[WGROUP1:.*]] : memref<42xf32, 3>, %[[WGROUP2:.*]] : memref<2xf32, 3>)
+        workgroup(%arg1: memref<42xf32, 3>, %arg2: memref<2xf32, 3>)
+    // CHECK-SAME: private(%[[PRIVATE1:.*]] : memref<2xf32, 5>, %[[PRIVATE2:.*]] : memref<1xf32, 5>)
+        private(%arg3: memref<2xf32, 5>, %arg4: memref<1xf32, 5>)
+                {
+      "use"(%float) : (f32) -> ()
+      "use"(%data) : (memref<?xf32,1>) -> ()
+      // CHECK: "use"(%[[WGROUP1]], %[[WGROUP2]])
+      "use"(%arg1, %arg2) : (memref<42xf32, 3>, memref<2xf32, 3>) -> ()
+      // CHECK: "use"(%[[PRIVATE1]])
+      "use"(%arg3) : (memref<2xf32, 5>) -> ()
+      // CHECK: "use"(%[[PRIVATE2]])
+      "use"(%arg4) : (memref<1xf32, 5>) -> ()
+      // CHECK: gpu.terminator
+      gpu.terminator
+    }
+    return
+  }
+
+
   gpu.module @kernels {
     gpu.func @kernel_1(%arg0 : f32, %arg1 : memref<?xf32, 1>) kernel {
       %tIdX = gpu.thread_id x
@@ -228,17 +253,20 @@ module attributes {gpu.container_module} {
 
   gpu.module @gpu_funcs {
     // CHECK-LABEL: gpu.func @kernel_1({{.*}}: f32)
-    // CHECK:       workgroup
-    // CHECK:       private
-    // CHECK:       attributes
     gpu.func @kernel_1(%arg0: f32)
-        workgroup(%arg1: memref<42xf32, 3>)
-        private(%arg2: memref<2xf32, 5>, %arg3: memref<1xf32, 5>)
+    // CHECK:       workgroup(%[[WGROUP1:.*]] : memref<42xf32, 3>, %[[WGROUP2:.*]] : memref<2xf32, 3>)
+        workgroup(%arg1: memref<42xf32, 3>, %arg2: memref<2xf32, 3>)
+    // CHECK:       private(%[[PRIVATE1:.*]] : memref<2xf32, 5>, %[[PRIVATE2:.*]] : memref<1xf32, 5>)
+        private(%arg3: memref<2xf32, 5>, %arg4: memref<1xf32, 5>)
         kernel
-        attributes {foo="bar"} {
-      "use"(%arg1) : (memref<42xf32, 3>) -> ()
-      "use"(%arg2) : (memref<2xf32, 5>) -> ()
-      "use"(%arg3) : (memref<1xf32, 5>) -> ()
+    // CHECK:       attributes {foo = "bar"}
+        attributes {foo = "bar"} {
+      // CHECK: "use"(%[[WGROUP1]], %[[WGROUP2]])
+      "use"(%arg1, %arg2) : (memref<42xf32, 3>, memref<2xf32, 3>) -> ()
+      // CHECK: "use"(%[[PRIVATE1]])
+      "use"(%arg3) : (memref<2xf32, 5>) -> ()
+      // CHECK: "use"(%[[PRIVATE2]])
+      "use"(%arg4) : (memref<1xf32, 5>) -> ()
       gpu.return
     }