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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=internalize,ipsccp %s | FileCheck %s
; PR5569
; If BasicBlocks are unreachable, IPSCCP should convert them to unreachable.
; Unless they have their address taken, delete them. If they do have their
; address taken, let other passes replace these "dead" blockaddresses with some
; other Constant.
; CHECK: @bar.l = internal constant [2 x ptr] [ptr blockaddress(@bar, %lab0), ptr blockaddress(@bar, %end)]
@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]
define void @foo(i32 %x) nounwind readnone {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: unreachable
;
entry:
%b = alloca i32, align 4 ; <ptr> [#uses=1]
store volatile i32 -1, ptr %b
ret void
}
define void @bar(ptr nocapture %pc) nounwind readonly {
; CHECK-LABEL: @bar(
; CHECK-NEXT: entry:
; CHECK-NEXT: unreachable
; CHECK: lab0:
; CHECK-NEXT: unreachable
; CHECK: end:
; CHECK-NEXT: unreachable
;
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 {
; CHECK-LABEL: @main(
; CHECK-NEXT: entry:
; CHECK-NEXT: unreachable
;
entry:
ret i32 0
}
; https://github.com/llvm/llvm-project/issues/54238
; https://github.com/llvm/llvm-project/issues/54251
; https://github.com/llvm/llvm-project/issues/54328
define i32 @test1() {
; CHECK-LABEL: @test1(
; CHECK-NEXT: unreachable
; CHECK: redirected:
; CHECK-NEXT: unreachable
;
%1 = bitcast ptr blockaddress(@test1, %redirected) to ptr
call void @set_return_addr(ptr %1)
ret i32 0
redirected:
ret i32 0
}
define internal void @set_return_addr(ptr %addr) {
; CHECK-LABEL: @set_return_addr(
; CHECK-NEXT: unreachable
;
%addr.addr = alloca ptr, i32 0, align 8
store ptr %addr, ptr %addr.addr, align 8
ret void
}
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