[Mlir-commits] [mlir] [mlir][scf] ExecuteRegionOp folders to consider no_inline attribute (PR #158083)

[Dor Arad]

https://github.com/undor created https://github.com/llvm/llvm-project/pull/158083

Fix missing handling of no_inline existence in ExecuteRegionOp  folders.

>From 8fd7a2804002808afd8ce61fe8790bd656ec54c5 Mon Sep 17 00:00:00 2001
From: Dor Arad <dor.arad at mobileye.com>
Date: Thu, 11 Sep 2025 16:58:24 +0300
Subject: [PATCH] [mlir][scf] ExecuteRegionOp folders to consider no_inline
 attribute

---
 mlir/lib/Dialect/SCF/IR/SCF.cpp         |  2 ++
 mlir/test/Dialect/SCF/canonicalize.mlir | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/mlir/lib/Dialect/SCF/IR/SCF.cpp b/mlir/lib/Dialect/SCF/IR/SCF.cpp
index 84f9777a443fd..c2dfd7a8a4e5f 100644
--- a/mlir/lib/Dialect/SCF/IR/SCF.cpp
+++ b/mlir/lib/Dialect/SCF/IR/SCF.cpp
@@ -236,6 +236,8 @@ struct MultiBlockExecuteInliner : public OpRewritePattern<ExecuteRegionOp> {
 
   LogicalResult matchAndRewrite(ExecuteRegionOp op,
                                 PatternRewriter &rewriter) const override {
+    if (op.getNoInline())
+      return failure();
     if (!isa<FunctionOpInterface, ExecuteRegionOp>(op->getParentOp()))
       return failure();
 
diff --git a/mlir/test/Dialect/SCF/canonicalize.mlir b/mlir/test/Dialect/SCF/canonicalize.mlir
index 2752c492cb2be..4ad2da8388eb7 100644
--- a/mlir/test/Dialect/SCF/canonicalize.mlir
+++ b/mlir/test/Dialect/SCF/canonicalize.mlir
@@ -1483,6 +1483,24 @@ func.func @execute_region_no_inline() {
 
 // -----
 
+// CHECK-LABEL: func @execute_region_under_func_no_inline
+func.func @execute_region_under_func_no_inline() {
+    "test.foo"() : () -> ()
+    %v = scf.execute_region -> i64 no_inline {
+      %x = "test.val"() : () -> i64
+      scf.yield %x : i64
+    }
+    "test.bar"(%v) : (i64) -> ()
+  return
+}
+
+// CHECK-NEXT:       "test.foo"() : () -> ()
+// CHECK-NEXT:       scf.execute_region
+// CHECK-NEXT:       %[[VAL:.*]] = "test.val"() : () -> i64
+// CHECK-NEXT:       scf.yield %[[VAL]] : i64
+
+// -----
+
 // CHECK-LABEL: func @func_execute_region_inline
 func.func @func_execute_region_inline() {
     "test.foo"() : () -> ()