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56 lines
1022 B
56 lines
1022 B
; RUN: opt -S -gvn-hoist < %s | FileCheck %s
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%struct.__jmp_buf_tag = type { [8 x i64], i32 }
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; Check that hoisting only happens when the expression is very busy.
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; CHECK: store
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; CHECK: store
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@test_exit_buf = global %struct.__jmp_buf_tag zeroinitializer
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@G = global i32 0
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define void @test_command(i32 %c1) {
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entry:
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switch i32 %c1, label %exit [
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i32 0, label %sw0
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i32 1, label %sw1
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]
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sw0:
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store i32 1, i32* @G
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br label %exit
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sw1:
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store i32 1, i32* @G
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br label %exit
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exit:
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call void @longjmp(%struct.__jmp_buf_tag* @test_exit_buf, i32 1) #0
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unreachable
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}
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declare void @longjmp(%struct.__jmp_buf_tag*, i32) #0
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attributes #0 = { noreturn nounwind }
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; Check that the store is hoisted.
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; CHECK-LABEL: define void @fun(
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; CHECK: store
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; CHECK-NOT: store
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define void @fun() {
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entry:
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br label %if.then
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if.then: ; preds = %entry
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br i1 undef, label %sw0, label %sw1
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sw0:
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store i32 1, i32* @G
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unreachable
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sw1:
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store i32 1, i32* @G
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ret void
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}
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