File: known-bits-from-operator-constexpr.ll

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llvm-toolchain-21 1%3A21.1.6-3
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s

; Reproducer for a crash in computeKnownBitsFromOperator due to blindly
; casting from llvm::Operator to ExtractElementInst. That does not work
; if the Operator is a ConstantExpr.
@g = global [21 x i32] zeroinitializer
define i32 @test1(i32 %a) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    [[T:%.*]] = sub i32 [[A:%.*]], ptrtoint (ptr getelementptr inbounds ([21 x i32], ptr @g, i32 0, i32 17) to i32)
; CHECK-NEXT:    ret i32 [[T]]
;
  %t = sub i32 %a, extractelement (<4 x i32> ptrtoint (<4 x ptr> getelementptr inbounds ([21 x i32], ptr @g, <4 x i32> zeroinitializer, <4 x i32> <i32 1, i32 2, i32 3, i32 17>) to <4 x i32>), i32 3)
  ret i32 %t
}