[llvm-bugs] [Bug 49315] New: ICE when assigning a function to a pointer.

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Feb 22 07:09:48 PST 2021


            Bug ID: 49315
           Summary: ICE when assigning a function to a pointer.
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: OpenCL
          Assignee: unassignedclangbugs at nondot.org
          Reporter: anastasia.stulova at arm.com
                CC: anastasia.stulova at arm.com, llvm-bugs at lists.llvm.org

When the extension for the function pointers is used

#pragma OPENCL EXTENSION __cl_clang_function_pointers : enable
void foo();

void bar(){
 void (*f)() = foo;

frontend fails to compile it failing in the incorrect address space conversion

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index e03183c1a42f..8aece0b63037 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -15823,6 +15823,7 @@ bool Sema::DiagnoseAssignmentResult(AssignConvertType

     isInvalid = true;

+    // FIXME: On function types we should not be taking a pointee.
     Qualifiers lhq = SrcType->getPointeeType().getQualifiers();
     Qualifiers rhq = DstType->getPointeeType().getQualifiers();
+    // FIXME: The right check should take the address space compatibility into
     if (lhq.getAddressSpace() != rhq.getAddressSpace()) {

This issue is not triggered in C++ for OpenCL mode that seems to follow
different conversion path.

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