[Mlir-commits] [mlir] [mlir][spirv] Fix a crash of typeConverter with non supported type (PR #79955)

[llvmlistbot at llvm.org]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-mlir

Author: Kohei Yamaguchi (sott0n)

<details>
<summary>Changes</summary>

Fixes a crash in the `convert-to-spirv-llvm` pass caused by unsupported types (e.g., 
 `spirv.matrix` ). This PR fixes it by checking the converted type.

Fixes #<!-- -->60017

---
Full diff: https://github.com/llvm/llvm-project/pull/79955.diff


1 Files Affected:

- (modified) mlir/lib/Conversion/SPIRVToLLVM/SPIRVToLLVM.cpp (+7-6) 


``````````diff
diff --git a/mlir/lib/Conversion/SPIRVToLLVM/SPIRVToLLVM.cpp b/mlir/lib/Conversion/SPIRVToLLVM/SPIRVToLLVM.cpp
index c62e676efc159..c7c67c04c8919 100644
--- a/mlir/lib/Conversion/SPIRVToLLVM/SPIRVToLLVM.cpp
+++ b/mlir/lib/Conversion/SPIRVToLLVM/SPIRVToLLVM.cpp
@@ -367,12 +367,13 @@ class AccessChainPattern : public SPIRVToLLVMConversion<spirv::AccessChainOp> {
     Value zero = rewriter.create<LLVM::ConstantOp>(
         op.getLoc(), llvmIndexType, rewriter.getIntegerAttr(indexType, 0));
     indices.insert(indices.begin(), zero);
-    rewriter.replaceOpWithNewOp<LLVM::GEPOp>(
-        op, dstType,
-        typeConverter.convertType(
-            cast<spirv::PointerType>(op.getBasePtr().getType())
-                .getPointeeType()),
-        adaptor.getBasePtr(), indices);
+
+    auto elementType = typeConverter.convertType(
+        cast<spirv::PointerType>(op.getBasePtr().getType()).getPointeeType());
+    if (!elementType)
+      return failure();
+    rewriter.replaceOpWithNewOp<LLVM::GEPOp>(op, dstType, elementType,
+                                             adaptor.getBasePtr(), indices);
     return success();
   }
 };

``````````

</details>


https://github.com/llvm/llvm-project/pull/79955