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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
define i64 @ptrdiff(ptr %ptr) {
; CHECK-LABEL: @ptrdiff(
; CHECK-NEXT: ret i64 42
;
%last = getelementptr inbounds i8, ptr %ptr, i32 42
%first.int = ptrtoint ptr %ptr to i64
%last.int = ptrtoint ptr %last to i64
%diff = sub i64 %last.int, %first.int
ret i64 %diff
}
define i64 @ptrdiff_no_inbounds(ptr %ptr) {
; CHECK-LABEL: @ptrdiff_no_inbounds(
; CHECK-NEXT: ret i64 42
;
%last = getelementptr i8, ptr %ptr, i32 42
%first.int = ptrtoint ptr %ptr to i64
%last.int = ptrtoint ptr %last to i64
%diff = sub i64 %last.int, %first.int
ret i64 %diff
}
define i64 @ptrdiff_chain(ptr %ptr) {
; CHECK-LABEL: @ptrdiff_chain(
; CHECK-NEXT: ret i64 42
;
%first2 = getelementptr inbounds i8, ptr %ptr, i32 1
%first3 = getelementptr inbounds i8, ptr %first2, i32 2
%first4 = getelementptr inbounds i8, ptr %first3, i32 4
%last1 = getelementptr inbounds i8, ptr %first2, i32 48
%last2 = getelementptr inbounds i8, ptr %last1, i32 8
%last3 = getelementptr inbounds i8, ptr %last2, i32 -4
%last4 = getelementptr inbounds i8, ptr %last3, i32 -4
%first.int = ptrtoint ptr %first4 to i64
%last.int = ptrtoint ptr %last4 to i64
%diff = sub i64 %last.int, %first.int
ret i64 %diff
}
; Handle simple cases of vectors of pointers.
define <4 x i32> @ptrdiff_vectors(<4 x ptr> %arg) nounwind {
; CHECK-LABEL: @ptrdiff_vectors(
; CHECK-NEXT: ret <4 x i32> zeroinitializer
;
%p1 = ptrtoint <4 x ptr> %arg to <4 x i32>
%bc = bitcast <4 x ptr> %arg to <4 x ptr>
%p2 = ptrtoint <4 x ptr> %bc to <4 x i32>
%sub = sub <4 x i32> %p1, %p2
ret <4 x i32> %sub
}
%struct.ham = type { i32, [2 x [2 x i32]] }
@global = internal global %struct.ham zeroinitializer, align 4
define i32 @ptrdiff_global() nounwind {
; CHECK-LABEL: @ptrdiff_global(
; CHECK-NEXT: bb:
; CHECK-NEXT: ret i32 0
;
bb:
%tmp = getelementptr inbounds %struct.ham, ptr @global, i32 0, i32 1
%tmp3 = ptrtoint ptr %tmp to i32
%tmp4 = getelementptr inbounds %struct.ham, ptr @global, i32 0, i32 1
%tmp6 = ptrtoint ptr %tmp4 to i32
%tmp7 = sub i32 %tmp3, %tmp6
ret i32 %tmp7
}
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