llvm/test/Transforms/InstSimplify/ConstProp/inttoptr-gep-nonintegral.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
;; Check that we do not create new inttoptr instructions for unstable pointers
;; or pointers with external state (even if the values are all constants).
;; NOTE: for all but the zero address space, the GEP should only modify the
;; low 8 bits of the pointer.
target datalayout = "p:16:16:16:16-p1:16:16:16:8-pu2:16:16:16:8-pe3:16:16:16:8"

define ptr @test_null_base_normal() {
; CHECK-LABEL: define ptr @test_null_base_normal() {
; CHECK-NEXT:    ret ptr inttoptr (i16 -2 to ptr)
;
  %gep = getelementptr i8, ptr null, i8 -2
  ret ptr %gep
}
define ptr @test_inttoptr_base_normal() {
; CHECK-LABEL: define ptr @test_inttoptr_base_normal() {
; CHECK-NEXT:    ret ptr null
;
  %base = inttoptr i16 -1 to ptr
  %gep = getelementptr i8, ptr %base, i8 1
  ret ptr %gep
}

;; Transformation is fine for non-integral address space, but we can only change
;; the index bits: (i8 -2 == i16 254)
define ptr addrspace(1) @test_null_base_nonintegral() {
; CHECK-LABEL: define ptr addrspace(1) @test_null_base_nonintegral() {
; CHECK-NEXT:    ret ptr addrspace(1) inttoptr (i16 254 to ptr addrspace(1))
;
  %gep = getelementptr i8, ptr addrspace(1) null, i8 -2
  ret ptr addrspace(1) %gep
}
define ptr addrspace(1) @test_inttoptr_base_nonintegral() {
; CHECK-LABEL: define ptr addrspace(1) @test_inttoptr_base_nonintegral() {
; CHECK-NEXT:    ret ptr addrspace(1) inttoptr (i16 -256 to ptr addrspace(1))
;
  %base = inttoptr i16 -1 to ptr addrspace(1)
  %gep = getelementptr i8, ptr addrspace(1) %base, i8 1
  ret ptr addrspace(1) %gep
}

;; For unstable pointers we should avoid any introduction of inttoptr
define ptr addrspace(2) @test_null_base_unstable() {
; CHECK-LABEL: define ptr addrspace(2) @test_null_base_unstable() {
; CHECK-NEXT:    ret ptr addrspace(2) getelementptr (i8, ptr addrspace(2) null, i8 -2)
;
  %gep = getelementptr i8, ptr addrspace(2) null, i8 -2
  ret ptr addrspace(2) %gep
}
define ptr addrspace(2) @test_inttoptr_base_unstable() {
; CHECK-LABEL: define ptr addrspace(2) @test_inttoptr_base_unstable() {
; CHECK-NEXT:    ret ptr addrspace(2) getelementptr (i8, ptr addrspace(2) inttoptr (i16 -1 to ptr addrspace(2)), i8 1)
;
  %base = inttoptr i16 -1 to ptr addrspace(2)
  %gep = getelementptr i8, ptr addrspace(2) %base, i8 1
  ret ptr addrspace(2) %gep
}

;; The same is true for pointers with external state: no new inttoptr
define ptr addrspace(3) @test_null_base_external() {
; CHECK-LABEL: define ptr addrspace(3) @test_null_base_external() {
; CHECK-NEXT:    ret ptr addrspace(3) getelementptr (i8, ptr addrspace(3) null, i8 -2)
;
  %gep = getelementptr i8, ptr addrspace(3) null, i8 -2
  ret ptr addrspace(3) %gep
}

define ptr addrspace(3) @test_inttoptr_base_external() {
; CHECK-LABEL: define ptr addrspace(3) @test_inttoptr_base_external() {
; CHECK-NEXT:    ret ptr addrspace(3) getelementptr (i8, ptr addrspace(3) inttoptr (i16 -1 to ptr addrspace(3)), i8 1)
;
  %base = inttoptr i16 -1 to ptr addrspace(3)
  %gep = getelementptr i8, ptr addrspace(3) %base, i8 1
  ret ptr addrspace(3) %gep
}

define <2 x ptr> @test_vec_null_base_normal() {
; CHECK-LABEL: define <2 x ptr> @test_vec_null_base_normal() {
; CHECK-NEXT:    ret <2 x ptr> getelementptr (i8, <2 x ptr> zeroinitializer, <2 x i16> <i16 -2, i16 -3>)
;
  %gep = getelementptr i8, <2 x ptr> <ptr null, ptr null>, <2 x i8> <i8 -2, i8 -3>
  ret <2 x ptr> %gep
}
define <2 x ptr> @test_vec_inttoptr_base_normal() {
; CHECK-LABEL: define <2 x ptr> @test_vec_inttoptr_base_normal() {
; CHECK-NEXT:    ret <2 x ptr> getelementptr (i8, <2 x ptr> <ptr inttoptr (i16 -1 to ptr), ptr inttoptr (i16 -2 to ptr)>, <2 x i16> <i16 1, i16 2>)
;
  %base = inttoptr <2 x i16> <i16 -1, i16 -2> to <2 x ptr>
  %gep = getelementptr i8, <2 x ptr> %base, <2 x i8> <i8 1, i8 2>
  ret <2 x ptr> %gep
}

;; Transformation is fine for non-integral address space, but we can only change
;; the index bits: (i8 -2 == i16 254)
define <2 x ptr addrspace(1)> @test_vec_null_base_nonintegral() {
; CHECK-LABEL: define <2 x ptr addrspace(1)> @test_vec_null_base_nonintegral() {
; CHECK-NEXT:    ret <2 x ptr addrspace(1)> getelementptr (i8, <2 x ptr addrspace(1)> zeroinitializer, <2 x i8> <i8 -2, i8 -3>)
;
  %gep = getelementptr i8, <2 x ptr addrspace(1)> <ptr addrspace(1) null, ptr addrspace(1) null>, <2 x i8> <i8 -2, i8 -3>
  ret <2 x ptr addrspace(1)> %gep
}
define <2 x ptr addrspace(1)> @test_vec_inttoptr_base_nonintegral() {
; CHECK-LABEL: define <2 x ptr addrspace(1)> @test_vec_inttoptr_base_nonintegral() {
; CHECK-NEXT:    ret <2 x ptr addrspace(1)> getelementptr (i8, <2 x ptr addrspace(1)> <ptr addrspace(1) inttoptr (i16 -1 to ptr addrspace(1)), ptr addrspace(1) inttoptr (i16 -2 to ptr addrspace(1))>, <2 x i8> <i8 1, i8 2>)
;
  %base = inttoptr <2 x i16> <i16 -1, i16 -2> to <2 x ptr addrspace(1)>
  %gep = getelementptr i8, <2 x ptr addrspace(1)> %base, <2 x i8> <i8 1, i8 2>
  ret <2 x ptr addrspace(1)> %gep
}

;; For unstable pointers we should avoid any introduction of inttoptr
define <2 x ptr addrspace(2)> @test_vec_null_base_unstable() {
; CHECK-LABEL: define <2 x ptr addrspace(2)> @test_vec_null_base_unstable() {
; CHECK-NEXT:    ret <2 x ptr addrspace(2)> getelementptr (i8, <2 x ptr addrspace(2)> zeroinitializer, <2 x i8> <i8 -2, i8 -3>)
;
  %gep = getelementptr i8, <2 x ptr addrspace(2)> <ptr addrspace(2) null, ptr addrspace(2) null>, <2 x i8> <i8 -2, i8 -3>
  ret <2 x ptr addrspace(2)> %gep
}
define <2 x ptr addrspace(2)> @test_vec_inttoptr_base_unstable() {
; CHECK-LABEL: define <2 x ptr addrspace(2)> @test_vec_inttoptr_base_unstable() {
; CHECK-NEXT:    ret <2 x ptr addrspace(2)> getelementptr (i8, <2 x ptr addrspace(2)> <ptr addrspace(2) inttoptr (i16 -1 to ptr addrspace(2)), ptr addrspace(2) inttoptr (i16 -2 to ptr addrspace(2))>, <2 x i8> <i8 1, i8 2>)
;
  %base = inttoptr <2 x i16> <i16 -1, i16 -2> to <2 x ptr addrspace(2)>
  %gep = getelementptr i8, <2 x ptr addrspace(2)> %base, <2 x i8> <i8 1, i8 2>
  ret <2 x ptr addrspace(2)> %gep
}

;; The same is true for pointers with external state: no new inttoptr
define <2 x ptr addrspace(3)> @test_vec_null_base_external() {
; CHECK-LABEL: define <2 x ptr addrspace(3)> @test_vec_null_base_external() {
; CHECK-NEXT:    ret <2 x ptr addrspace(3)> getelementptr (i8, <2 x ptr addrspace(3)> zeroinitializer, <2 x i8> <i8 -2, i8 -3>)
;
  %gep = getelementptr i8, <2 x ptr addrspace(3)> <ptr addrspace(3) null, ptr addrspace(3) null>, <2 x i8> <i8 -2, i8 -3>
  ret <2 x ptr addrspace(3)> %gep
}

define <2 x ptr addrspace(3)> @test_vec_inttoptr_base_external() {
; CHECK-LABEL: define <2 x ptr addrspace(3)> @test_vec_inttoptr_base_external() {
; CHECK-NEXT:    ret <2 x ptr addrspace(3)> getelementptr (i8, <2 x ptr addrspace(3)> <ptr addrspace(3) inttoptr (i16 -1 to ptr addrspace(3)), ptr addrspace(3) inttoptr (i16 -2 to ptr addrspace(3))>, <2 x i8> <i8 1, i8 2>)
;
  %base = inttoptr <2 x i16> <i16 -1, i16 -2> to <2 x ptr addrspace(3)>
  %gep = getelementptr i8, <2 x ptr addrspace(3)> %base, <2 x i8> <i8 1, i8 2>
  ret <2 x ptr addrspace(3)> %gep
}