llvm/test/Transforms/GVN/constexpr-vector-constainsundef-crash.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=gvn -S %s | FileCheck %s

; Reduced test case from
; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24278

; Make sure we do not crash when dealing with a vector constant expression.
define <4 x ptr> @test(ptr %ptr) null_pointer_is_valid {
; CHECK-LABEL: @test(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[L3:%.*]] = load i64, ptr [[PTR:%.*]], align 4
; CHECK-NEXT:    [[I6:%.*]] = insertelement <4 x ptr> getelementptr inbounds (i64, ptr null, <4 x i64> <i64 0, i64 0, i64 0, i64 -128>), ptr undef, i64 [[L3]]
; CHECK-NEXT:    ret <4 x ptr> [[I6]]
;
entry:
  %B9 = sdiv i16 -32768, 256
  %L3 = load i64, ptr %ptr, align 4
  %B3 = sub i16 0, %B9
  %0 = insertelement <4 x i16> undef, i16 %B3, i32 3
  %1 = sub <4 x i16> zeroinitializer, %0
  %2 = sext <4 x i16> %1 to <4 x i32>
  %3 = getelementptr inbounds i64, ptr null, <4 x i32> %2
  %I6 = insertelement <4 x ptr> %3, ptr undef, i64 %L3
  ret <4 x ptr> %I6
}