5d6cd61904
In addition to removing phi nodes this patch removes any landing pad that the dead exit block might have. Without this fix Verifier complains about a new switch instruction jumps to a block with a landing pad. Differential Revision: https://reviews.llvm.org/D84320
89 lines
1.8 KiB
LLVM
89 lines
1.8 KiB
LLVM
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -loop-simplifycfg %s | FileCheck %s
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; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes='require<domtree>,loop(simplify-cfg)' %s | FileCheck %s
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declare i32* @fake_personality_function()
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declare void @foo()
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define i32 @test_remove_lpad(i1 %exitcond) personality i32* ()* @fake_personality_function {
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; CHECK-LABEL: @test_remove_lpad(
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entry:
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br label %for.body
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for.body:
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br i1 0, label %never, label %next
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next:
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br label %latch
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latch:
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br i1 %exitcond, label %exit, label %for.body
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exit:
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ret i32 0
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never:
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invoke void @foo() to label %next unwind label %never-unwind
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never-unwind:
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; CHECK: never-unwind:
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; CHECK-NEXT: unreachable
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%res = landingpad token cleanup
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unreachable
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}
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define i32 @test_remove_phi_lpad(i1 %exitcond) personality i32* ()* @fake_personality_function {
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; CHECK-LABEL: @test_remove_phi_lpad(
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entry:
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br label %for.body
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for.body:
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br i1 0, label %never, label %next
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next:
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br label %latch
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latch:
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br i1 %exitcond, label %exit, label %for.body
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exit:
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ret i32 0
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never:
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invoke void @foo() to label %next unwind label %never-unwind
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never-unwind:
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; CHECK: never-unwind:
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; CHECK-NEXT: ret i32 undef
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%p = phi i32 [1, %never]
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%res = landingpad token cleanup
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ret i32 %p
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}
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define i32 @test_split_remove_phi_lpad_(i1 %exitcond) personality i32* ()* @fake_personality_function {
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; CHECK-LABEL: @test_split_remove_phi_lpad_(
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entry:
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invoke void @foo() to label %for.body unwind label %unwind-bb
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for.body:
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br i1 0, label %never, label %next
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next:
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br label %latch
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latch:
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br i1 %exitcond, label %exit, label %for.body
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exit:
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ret i32 0
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never:
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invoke void @foo() to label %next unwind label %unwind-bb
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unwind-bb:
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; CHECK: unwind-bb.loopexit:
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; CHECK-NEXT: br label %unwind-bb
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%p = phi i32 [1, %never], [2, %entry]
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%res = landingpad token cleanup
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ret i32 %p
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}
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