[mlir][EmitC] Fix call ops with zero arguments in func to emitc conversion

[simon-camp]

No description provided.

[llvmbot]

@llvm/pr-subscribers-mlir-emitc

@llvm/pr-subscribers-mlir

Author: Simon Camphausen (simon-camp)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/94936.diff

2 Files Affected:

• (modified) mlir/lib/Conversion/FuncToEmitC/FuncToEmitC.cpp (+1-1)
• (modified) mlir/test/Conversion/FuncToEmitC/func-to-emitc.mlir (+16)

diff --git a/mlir/lib/Conversion/FuncToEmitC/FuncToEmitC.cpp b/mlir/lib/Conversion/FuncToEmitC/FuncToEmitC.cpp
index 6a8ecb7b00473..f0bb2093af277 100644
--- a/mlir/lib/Conversion/FuncToEmitC/FuncToEmitC.cpp
+++ b/mlir/lib/Conversion/FuncToEmitC/FuncToEmitC.cpp
@@ -38,7 +38,7 @@ class CallOpConversion final : public OpConversionPattern<func::CallOp> {
 
     rewriter.replaceOpWithNewOp<emitc::CallOp>(
         callOp,
-        callOp.getNumResults() ? callOp.getResult(0).getType() : nullptr,
+        callOp.getNumResults() ? callOp.getResult(0).getType() : TypeRange{},
         adaptor.getOperands(), callOp->getAttrs());
 
     return success();
diff --git a/mlir/test/Conversion/FuncToEmitC/func-to-emitc.mlir b/mlir/test/Conversion/FuncToEmitC/func-to-emitc.mlir
index 5c96cf1ce0d34..5730f7a4814fa 100644
--- a/mlir/test/Conversion/FuncToEmitC/func-to-emitc.mlir
+++ b/mlir/test/Conversion/FuncToEmitC/func-to-emitc.mlir
@@ -58,3 +58,19 @@ func.func @call(%arg0: i32) -> i32 {
 
 // CHECK-LABEL: emitc.func private @return_i32(i32) -> i32 attributes {specifiers = ["extern"]}
 func.func private @return_i32(%arg0: i32) -> i32
+
+// -----
+
+// CHECK-LABEL: emitc.func private @return_void() attributes {specifiers = ["static"]}
+// CHECK-NEXT: emitc.return
+func.func private @return_void() {
+  return
+}
+
+// CHECK-LABEL: emitc.func @call()
+// CHECK-NEXT: emitc.call @return_void() : () -> ()
+// CHECK-NEXT: emitc.return
+func.func @call() {
+  call @return_void() : () -> ()
+  return
+}

[mgehre-amd]

Thanks for the fix!