derek.holloway
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89 lines
2.7 KiB
LLVM
89 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=internalize,ipsccp %s | FileCheck %s
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; PR5569
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; If BasicBlocks are unreachable, IPSCCP should convert them to unreachable.
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; Unless they have their address taken, delete them. If they do have their
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; address taken, let other passes replace these "dead" blockaddresses with some
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; other Constant.
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; CHECK: @bar.l = internal constant [2 x ptr] [ptr blockaddress(@bar, %lab0), ptr blockaddress(@bar, %end)]
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@code = global [5 x i32] [i32 0, i32 0, i32 0, i32 0, i32 1], align 4 ; <ptr> [#uses=0]
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@bar.l = internal constant [2 x ptr] [ptr blockaddress(@bar, %lab0), ptr blockaddress(@bar, %end)] ; <ptr> [#uses=1]
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define void @foo(i32 %x) nounwind readnone {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: unreachable
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;
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entry:
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%b = alloca i32, align 4 ; <ptr> [#uses=1]
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store volatile i32 -1, ptr %b
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ret void
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}
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define void @bar(ptr nocapture %pc) nounwind readonly {
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: unreachable
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; CHECK: lab0:
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; CHECK-NEXT: unreachable
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; CHECK: end:
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; CHECK-NEXT: unreachable
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;
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entry:
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br label %indirectgoto
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lab0: ; preds = %indirectgoto
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%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
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br label %indirectgoto
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end: ; preds = %indirectgoto
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ret void
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indirectgoto: ; preds = %lab0, %entry
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%indvar = phi i32 [ %indvar.next, %lab0 ], [ 0, %entry ] ; <i32> [#uses=2]
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%pc.addr.0 = getelementptr i32, ptr %pc, i32 %indvar ; <ptr> [#uses=1]
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%tmp1.pn = load i32, ptr %pc.addr.0 ; <i32> [#uses=1]
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%indirect.goto.dest.in = getelementptr inbounds [2 x ptr], ptr @bar.l, i32 0, i32 %tmp1.pn ; <ptr> [#uses=1]
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%indirect.goto.dest = load ptr, ptr %indirect.goto.dest.in ; <ptr> [#uses=1]
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indirectbr ptr %indirect.goto.dest, [label %lab0, label %end]
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}
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define i32 @main() nounwind readnone {
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; CHECK-LABEL: @main(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: unreachable
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;
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entry:
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ret i32 0
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}
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; https://github.com/llvm/llvm-project/issues/54238
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; https://github.com/llvm/llvm-project/issues/54251
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; https://github.com/llvm/llvm-project/issues/54328
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define i32 @test1() {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: unreachable
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; CHECK: redirected:
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; CHECK-NEXT: unreachable
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;
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%1 = bitcast ptr blockaddress(@test1, %redirected) to ptr
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call void @set_return_addr(ptr %1)
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ret i32 0
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redirected:
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ret i32 0
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}
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define internal void @set_return_addr(ptr %addr) {
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; CHECK-LABEL: @set_return_addr(
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; CHECK-NEXT: unreachable
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;
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%addr.addr = alloca ptr, i32 0, align 8
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store ptr %addr, ptr %addr.addr, align 8
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ret void
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}
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