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