forked from OSchip/llvm-project
116 lines
3.5 KiB
LLVM
116 lines
3.5 KiB
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
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declare void @f()
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declare void @llvm.foo(i32) nounwind
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declare void @ProcessCLRException()
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define void @test1() personality void ()* @ProcessCLRException {
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entry:
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invoke void @f()
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to label %exit unwind label %exn.dispatch
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exn.dispatch:
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%cs = catchswitch within none [label %pad1, label %pad2] unwind to caller
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pad1:
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%cp1 = catchpad within %cs [i32 1]
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call void @llvm.foo(i32 1)
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catchret from %cp1 to label %exit
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pad2:
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%cp2 = catchpad within %cs [i32 2]
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unreachable
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exit:
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ret void
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}
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; Remove unreachble catch2, leave catch1 as-is
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; CHECK-LABEL: define void @test1()
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; CHECK: %cs = catchswitch within none [label %pad1] unwind to caller
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; CHECK-NOT: catchpad
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; CHECK: %cp1 = catchpad within %cs [i32 1]
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; CHECK-NOT: catchpad
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; Remove both catchpads and the catchswitch from exn.dispatch
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; CHECK-LABEL: define void @test2()
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define void @test2() personality void ()* @ProcessCLRException {
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entry:
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invoke void @f()
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to label %via.cleanup unwind label %exn.dispatch
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; CHECK-NOT: invoke
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; CHECK: call void @f()
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via.cleanup:
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invoke void @f()
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to label %via.catchswitch unwind label %cleanup.inner
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cleanup.inner:
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%cp.inner = cleanuppad within none []
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call void @llvm.foo(i32 0)
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cleanupret from %cp.inner unwind label %exn.dispatch
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; CHECK: cleanupret from %cp.inner unwind to caller
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via.catchswitch:
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invoke void @f()
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to label %exit unwind label %dispatch.inner
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dispatch.inner:
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%cs.inner = catchswitch within none [label %pad.inner] unwind label %exn.dispatch
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; CHECK: %cs.inner = catchswitch within none [label %pad.inner] unwind to caller
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pad.inner:
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%catch.inner = catchpad within %cs.inner [i32 0]
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; CHECK: %catch.inner = catchpad within %cs.inner
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call void @llvm.foo(i32 1)
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catchret from %catch.inner to label %exit
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exn.dispatch:
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%cs = catchswitch within none [label %pad1, label %pad2] unwind to caller
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; CHECK-NOT: catchswitch within
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; CHECK-NOT: catchpad
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pad1:
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catchpad within %cs [i32 1]
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unreachable
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pad2:
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catchpad within %cs [i32 2]
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unreachable
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exit:
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ret void
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}
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; Same as @test2, but exn.dispatch catchswitch has an unwind dest that
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; preds need to be reidrected to
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; CHECK-LABEL: define void @test3()
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define void @test3() personality void ()* @ProcessCLRException {
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entry:
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invoke void @f()
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to label %via.cleanup unwind label %exn.dispatch
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; CHECK: invoke void @f()
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; CHECK-NEXT: to label %via.cleanup unwind label %cleanup
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via.cleanup:
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invoke void @f()
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to label %via.catchswitch unwind label %cleanup.inner
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cleanup.inner:
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%cp.inner = cleanuppad within none []
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call void @llvm.foo(i32 0)
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cleanupret from %cp.inner unwind label %exn.dispatch
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; CHECK: cleanupret from %cp.inner unwind label %cleanup
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via.catchswitch:
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invoke void @f()
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to label %exit unwind label %dispatch.inner
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dispatch.inner:
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%cs.inner = catchswitch within none [label %pad.inner] unwind label %exn.dispatch
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; CHECK: %cs.inner = catchswitch within none [label %pad.inner] unwind label %cleanup
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pad.inner:
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%catch.inner = catchpad within %cs.inner [i32 0]
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; CHECK: %catch.inner = catchpad within %cs.inner
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call void @llvm.foo(i32 1)
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catchret from %catch.inner to label %exit
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exn.dispatch:
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%cs = catchswitch within none [label %pad1, label %pad2] unwind label %cleanup
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; CHECK-NOT: catchswitch within
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; CHECK-NOT: catchpad
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pad1:
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catchpad within %cs [i32 1]
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unreachable
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pad2:
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catchpad within %cs [i32 2]
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unreachable
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cleanup:
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%cp = cleanuppad within none []
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call void @llvm.foo(i32 0)
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cleanupret from %cp unwind to caller
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exit:
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ret void
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}
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