89 lines
2.7 KiB
LLVM
89 lines
2.7 KiB
LLVM
; 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
|
|
}
|