test/Transforms/ArgumentPromotion/reserve-tbaa.ll

; RUN: opt < %s -argpromotion -S

; PR17906
; When we promote two arguments in a single function with different types,
; before the fix, we used the same tag for the newly-created two loads.
; This testing case makes sure that we correctly transfer the tbaa tags from the
; original loads to the newly-created loads when promoting pointer arguments.

@a = global i32* null, align 8
@e = global i32** @a, align 8
@g = global i32 0, align 4
@c = global i64 0, align 8
@d = global i8 0, align 1

define internal fastcc void @fn(i32* nocapture readonly %p1, i64* nocapture readonly %p2) {
entry:
  %0 = load i64* %p2, align 8, !tbaa !1
  %conv = trunc i64 %0 to i32
  %1 = load i32* %p1, align 4, !tbaa !5
  %conv1 = trunc i32 %1 to i8
  store i8 %conv1, i8* @d, align 1, !tbaa !7
  ret void
}

define i32 @main() {
entry:
; CHECK-LABEL: main
; CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa ![[I32:[0-9]+]]
; CHECK: %g.val = load i32* @g, align 4, !tbaa ![[I32]]
; CHECK: %c.val = load i64* @c, align 8, !tbaa ![[LONG:[0-9]+]]
  %0 = load i32*** @e, align 8, !tbaa !8
  store i32* @g, i32** %0, align 8, !tbaa !8
  %1 = load i32** @a, align 8, !tbaa !8
  store i32 1, i32* %1, align 4, !tbaa !5
  call fastcc void @fn(i32* @g, i64* @c)

  ret i32 0
}

!1 = metadata !{metadata !2, metadata !2, i64 0}
!2 = metadata !{metadata !"long", metadata !3, i64 0}
!3 = metadata !{metadata !"omnipotent char", metadata !4, i64 0}
!4 = metadata !{metadata !"Simple C/C++ TBAA"}
!5 = metadata !{metadata !6, metadata !6, i64 0}
!6 = metadata !{metadata !"int", metadata !3, i64 0}
!7 = metadata !{metadata !3, metadata !3, i64 0}
!8 = metadata !{metadata !9, metadata !9, i64 0}
!9 = metadata !{metadata !"any pointer", metadata !3, i64 0}
; CHECK: ![[I32]] = metadata !{metadata ![[I32_TYPE:[0-9]+]], metadata ![[I32_TYPE]], i64 0}
; CHECK: ![[I32_TYPE]] = metadata !{metadata !"int", metadata !{{.*}}, i64 0}
; CHECK: ![[LONG]] = metadata !{metadata ![[LONG_TYPE:[0-9]+]], metadata ![[LONG_TYPE]], i64 0}
; CHECK: ![[LONG_TYPE]] = metadata !{metadata !"long", metadata !{{.*}}, i64 0}