llvm/test/Transforms/Attributor/IPConstantProp/dangling-block-address.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals
; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal  -attributor-annotate-decl-cs  -S < %s | FileCheck %s --check-prefixes=CHECK,TUNIT
; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,CGSCC
; PR5569

; IPSCCP should prove that the blocks are dead and delete them, and
; properly handle the dangling blockaddress constants.

@code = global [5 x i32] [i32 0, i32 0, i32 0, i32 0, i32 1], align 4 ; <ptr> [#uses=0]
@bar.l = internal constant [2 x ptr] [ptr blockaddress(@bar, %lab0), ptr blockaddress(@bar, %end)] ; <ptr> [#uses=1]

;.
; TUNIT: @code = global [5 x i32] [i32 0, i32 0, i32 0, i32 0, i32 1], align 4
; TUNIT: @bar.l = internal constant [2 x ptr] [ptr inttoptr (i32 1 to ptr), ptr inttoptr (i32 1 to ptr)]
;.
; CGSCC: @code = global [5 x i32] [i32 0, i32 0, i32 0, i32 0, i32 1], align 4
; CGSCC: @bar.l = internal constant [2 x ptr] [ptr blockaddress(@bar, %lab0), ptr blockaddress(@bar, %end)]
;.
define internal void @foo(i32 %x) nounwind readnone {
; CGSCC: Function Attrs: nounwind memory(none)
; CGSCC-LABEL: define {{[^@]+}}@foo
; CGSCC-SAME: (i32 [[X:%.*]]) #[[ATTR0:[0-9]+]] {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    [[B:%.*]] = alloca i32, align 4
; CGSCC-NEXT:    store volatile i32 -1, ptr [[B]], align 4
; CGSCC-NEXT:    ret void
;
entry:
  %b = alloca i32, align 4                        ; <ptr> [#uses=1]
  store volatile i32 -1, ptr %b
  ret void
}

define internal void @bar(ptr nocapture %pc) nounwind readonly {
; CGSCC: Function Attrs: nounwind memory(read)
; CGSCC-LABEL: define {{[^@]+}}@bar
; CGSCC-SAME: (ptr captures(none) [[PC:%.*]]) #[[ATTR1:[0-9]+]] {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    br label [[INDIRECTGOTO:%.*]]
; CGSCC:       lab0:
; CGSCC-NEXT:    [[INDVAR_NEXT:%.*]] = add i32 [[INDVAR:%.*]], 1
; CGSCC-NEXT:    br label [[INDIRECTGOTO]]
; CGSCC:       end:
; CGSCC-NEXT:    ret void
; CGSCC:       indirectgoto:
; CGSCC-NEXT:    [[INDVAR]] = phi i32 [ [[INDVAR_NEXT]], [[LAB0:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CGSCC-NEXT:    [[PC_ADDR_0:%.*]] = getelementptr i32, ptr [[PC]], i32 [[INDVAR]]
; CGSCC-NEXT:    [[TMP1_PN:%.*]] = load i32, ptr [[PC_ADDR_0]], align 4
; CGSCC-NEXT:    [[INDIRECT_GOTO_DEST_IN:%.*]] = getelementptr inbounds [2 x ptr], ptr @bar.l, i32 0, i32 [[TMP1_PN]]
; CGSCC-NEXT:    [[INDIRECT_GOTO_DEST:%.*]] = load ptr, ptr [[INDIRECT_GOTO_DEST_IN]], align 8
; CGSCC-NEXT:    indirectbr ptr [[INDIRECT_GOTO_DEST]], [label [[LAB0]], label %end]
;
entry:
  br label %indirectgoto

lab0:                                             ; preds = %indirectgoto
  %indvar.next = add i32 %indvar, 1               ; <i32> [#uses=1]
  br label %indirectgoto

end:                                              ; preds = %indirectgoto
  ret void

indirectgoto:                                     ; preds = %lab0, %entry
  %indvar = phi i32 [ %indvar.next, %lab0 ], [ 0, %entry ] ; <i32> [#uses=2]
  %pc.addr.0 = getelementptr i32, ptr %pc, i32 %indvar ; <ptr> [#uses=1]
  %tmp1.pn = load i32, ptr %pc.addr.0                 ; <i32> [#uses=1]
  %indirect.goto.dest.in = getelementptr inbounds [2 x ptr], ptr @bar.l, i32 0, i32 %tmp1.pn ; <ptr> [#uses=1]
  %indirect.goto.dest = load ptr, ptr %indirect.goto.dest.in ; <ptr> [#uses=1]
  indirectbr ptr %indirect.goto.dest, [label %lab0, label %end]
}

define i32 @main() nounwind readnone {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@main
; TUNIT-SAME: () #[[ATTR0:[0-9]+]] {
; TUNIT-NEXT:  entry:
; TUNIT-NEXT:    ret i32 0
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@main
; CGSCC-SAME: () #[[ATTR2:[0-9]+]] {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    ret i32 0
;
entry:
  ret i32 0
}
;.
; TUNIT: attributes #[[ATTR0]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) }
;.
; CGSCC: attributes #[[ATTR0]] = { nounwind memory(none) }
; CGSCC: attributes #[[ATTR1]] = { nounwind memory(read) }
; CGSCC: attributes #[[ATTR2]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) }
;.
;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
; CHECK: {{.*}}