test/Transforms/InstCombine/non-integral-pointers.ll

; RUN: opt -instcombine -S < %s | FileCheck %s

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:4"
target triple = "x86_64-unknown-linux-gnu"

define i8 addrspace(4)* @f_0() {
; CHECK-LABEL: @f_0(
; CHECK: ret i8 addrspace(4)* getelementptr (i8, i8 addrspace(4)* null, i64 50)
  %result = getelementptr i8, i8 addrspace(4)* null, i64 50
  ret i8 addrspace(4)* %result
}

define i8 addrspace(3)* @f_1() {
; inttoptr is fine here since addrspace(3) is integral.

; CHECK-LABEL: @f_1(
; CHECK: ret i8 addrspace(3)* inttoptr (i64 50 to i8 addrspace(3)*)
  %result = getelementptr i8, i8 addrspace(3)* null, i64 50
  ret i8 addrspace(3)* %result
}

define void @f_2(i8 addrspace(4)** %ptr0, i8 addrspace(4)** %ptr1) {
; It is not okay to convert the load/store pair to load and store
; integers, since pointers in address space 4 are non-integral.

; CHECK-LABEL: @f_2(
entry:
; CHECK:  %val = load i8 addrspace(4)*, i8 addrspace(4)** %ptr0, align 8
; CHECK:  store i8 addrspace(4)* %val, i8 addrspace(4)** %ptr1, align 8
; CHECK-NOT: load i64
; CHECK-NOT: store i64
  %val = load i8 addrspace(4)*, i8 addrspace(4)** %ptr0
  store i8 addrspace(4)* %val, i8 addrspace(4)** %ptr1
  ret void
}

define void @f_3(i8 addrspace(3)** %ptr0, i8 addrspace(3)** %ptr1) {
; It *is* okay to convert the load/store pair to load and store
; integers, since pointers in address space 3 are integral.

; CHECK-LABEL: @f_3(
entry:
; CHECK: load i64
; CHECK:  store i64
  %val = load i8 addrspace(3)*, i8 addrspace(3)** %ptr0
  store i8 addrspace(3)* %val, i8 addrspace(3)** %ptr1
  ret void
}

define i64 @g(i8 addrspace(4)** %gp) {
  ; CHECK-LABEL: @g(
  ; CHECK: load
  %.pre = load i8 addrspace(4)*, i8 addrspace(4)** %gp, align 8
  %v74 = call i8 addrspace(4)* @alloc()
  %v75 = addrspacecast i8 addrspace(4)* %v74 to i8*
  %v76 = bitcast i8* %v75 to i8 addrspace(4)**
  %v77 = getelementptr i8 addrspace(4)*, i8 addrspace(4)** %v76, i64 -1
  ; CHECK: store
  store i8 addrspace(4)* %.pre, i8 addrspace(4)** %v77, align 8
  %v80 = bitcast i8 addrspace(4)** %v77 to i64*
  ; CHECK: load
  ; CHECK-NOT: ptrtoint
  %v81 = load i64, i64* %v80, align 8
  ret i64 %v81
}

define i64 @g2(i8* addrspace(4)* %gp) {
  ; CHECK-LABEL: @g2(
  ; CHECK: load
  %.pre = load i8*, i8* addrspace(4)* %gp, align 8
  %v74 = call i8 addrspace(4)* @alloc()
  %v76 = bitcast i8 addrspace(4)* %v74 to i8* addrspace(4)*
  %v77 = getelementptr i8*, i8* addrspace(4)* %v76, i64 -1
  ; CHECK: store
  store i8* %.pre, i8* addrspace(4)* %v77, align 8
  %v80 = bitcast i8* addrspace(4)* %v77 to i64 addrspace(4)*
  ; CHECK-NOT: store
  %v81 = load i64, i64 addrspace(4)* %v80, align 8
  ret i64 %v81
}

declare i8 addrspace(4)* @alloc()

define i64 @f_4(i8 addrspace(4)* %v0) {
  ; CHECK-LABEL: @f_4(
  ; CHECK-NOT: ptrtoint
  %v5 = bitcast i64 (i64)* @f_5 to i64 (i8 addrspace(4)*)*
  %v6 = call i64 %v5(i8 addrspace(4)* %v0)
  ret i64 %v6
}

declare i64 @f_5(i64)