handle_dead_exits.ll
1.85 KB
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; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -loop-simplifycfg %s | FileCheck %s
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes='require<domtree>,loop(loop-simplifycfg)' %s | FileCheck %s
declare i32* @fake_personality_function()
declare void @foo()
define i32 @test_remove_lpad(i1 %exitcond) personality i32* ()* @fake_personality_function {
; CHECK-LABEL: @test_remove_lpad(
entry:
br label %for.body
for.body:
br i1 0, label %never, label %next
next:
br label %latch
latch:
br i1 %exitcond, label %exit, label %for.body
exit:
ret i32 0
never:
invoke void @foo() to label %next unwind label %never-unwind
never-unwind:
; CHECK: never-unwind:
; CHECK-NEXT: unreachable
%res = landingpad token cleanup
unreachable
}
define i32 @test_remove_phi_lpad(i1 %exitcond) personality i32* ()* @fake_personality_function {
; CHECK-LABEL: @test_remove_phi_lpad(
entry:
br label %for.body
for.body:
br i1 0, label %never, label %next
next:
br label %latch
latch:
br i1 %exitcond, label %exit, label %for.body
exit:
ret i32 0
never:
invoke void @foo() to label %next unwind label %never-unwind
never-unwind:
; CHECK: never-unwind:
; CHECK-NEXT: ret i32 undef
%p = phi i32 [1, %never]
%res = landingpad token cleanup
ret i32 %p
}
define i32 @test_split_remove_phi_lpad_(i1 %exitcond) personality i32* ()* @fake_personality_function {
; CHECK-LABEL: @test_split_remove_phi_lpad_(
entry:
invoke void @foo() to label %for.body unwind label %unwind-bb
for.body:
br i1 0, label %never, label %next
next:
br label %latch
latch:
br i1 %exitcond, label %exit, label %for.body
exit:
ret i32 0
never:
invoke void @foo() to label %next unwind label %unwind-bb
unwind-bb:
; CHECK: unwind-bb.loopexit:
; CHECK-NEXT: br label %unwind-bb
%p = phi i32 [1, %never], [2, %entry]
%res = landingpad token cleanup
ret i32 %p
}