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[SPIRV][NFC] Add test that triggers ASAN failure #182550

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[SPIRV][NFC] Add test that triggers ASAN failure #182550

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33 changes: 33 additions & 0 deletions llvm/test/CodeGen/SPIRV/pointers/fun-ptr-to-itself.ll
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; XFAIL: asan
; RUN: llc -mtriple=spirv32-unknown-unknown < %s --spirv-ext=+SPV_INTEL_function_pointers | FileCheck %s
; RUN: %if spirv-tools %{ llc -mtriple=spirv32-unknown-unknown < %s -filetype=obj | not spirv-val 2>&1 | FileCheck --check-prefix=SPIRV-VAL %s %}

; spirv-val poorly supports the SPV_INTEL_function_pointers extension.
; In this case the function type used in a pointer type fails.
; SPIRV-VAL: Invalid use of function type result id '[[#ID:]][%{{.*}}]'.
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@sarnex sarnex Feb 23, 2026

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Similar to my response on the other PR I don't think we should do this spirv-val output checking, but otherwise LGTM.

; SPIRV-VAL: %_ptr_Generic_4 = OpTypePointer Generic %[[#ID]]

; CHECK-DAG: OpCapability FunctionPointersINTEL
; CHECK-DAG: OpExtension "SPV_INTEL_function_pointers"
; CHECK-DAG: %[[#Void:]] = OpTypeVoid
; CHECK-DAG: %[[#FnTy:]] = OpTypeFunction %[[#Void]]
; CHECK-DAG: %[[#GenPtrTy:]] = OpTypePointer Generic %[[#FnTy]]
; CHECK-DAG: %[[#GenPtrPtrTy:]] = OpTypePointer Function %[[#GenPtrTy]]
; CHECK-DAG: %[[#Int8:]] = OpTypeInt 8 0
; CHECK-DAG: %[[#Int8PtrTy:]] = OpTypePointer Function %[[#Int8]]
; CHECK-DAG: %[[#CodePtrTy:]] = OpTypePointer CodeSectionINTEL %[[#FnTy]]
; CHECK-DAG: %[[#Null:]] = OpConstantNull %[[#Int8PtrTy]]
; CHECK-DAG: %[[#FnPtr:]] = OpConstantFunctionPointerINTEL %[[#CodePtrTy]] %[[#FnDef:]]
; CHECK: %[[#FnDef]] = OpFunction %[[#Void]] None %[[#FnTy]]
; CHECK: %[[#Cast:]] = OpPtrCastToGeneric %[[#GenPtrTy]] %[[#FnPtr]]
; CHECK: %[[#BC:]] = OpBitcast %[[#GenPtrPtrTy]] %[[#Null]]
; CHECK: OpStore %[[#BC]] %[[#Cast]] Aligned 8
; CHECK: OpReturn
; CHECK: OpFunctionEnd

define void @foo() {
entry:
store ptr addrspace(4) addrspacecast (ptr @foo to ptr addrspace(4)), ptr null, align 8
ret void
}

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