+; RUN: opt -mtriple=x86_x64-pc-windows-msvc -S -winehprepare < %s | FileCheck %s
+
+declare i32 @__CxxFrameHandler3(...)
+
+declare void @f()
+declare i32 @g()
+declare void @h(i32)
+declare i1 @b()
+
+
+define void @test1() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ ; %x def colors: {entry} subset of use colors; must spill
+ %x = call i32 @g()
+ invoke void @f()
+ to label %noreturn unwind label %catch
+catch:
+ catchpad []
+ to label %noreturn unwind label %endcatch
+noreturn:
+ ; %x use colors: {entry, cleanup}
+ call void @h(i32 %x)
+ unreachable
+endcatch:
+ catchendpad unwind to caller
+}
+; Need two copies of the call to @h, one under entry and one under catch.
+; Currently we generate a load for each, though we shouldn't need one
+; for the use in entry's copy.
+; CHECK-LABEL: @test1(
+; CHECK: entry:
+; CHECK: store i32 %x, i32* [[Slot:%[^ ]+]]
+; CHECK: invoke void @f()
+; CHECK: to label %[[EntryCopy:[^ ]+]] unwind label %catch
+; CHECK: catch:
+; CHECK: catchpad [] to label %[[CatchCopy:[^ ]+]] unwind
+; CHECK: [[CatchCopy]]:
+; CHECK: [[LoadX2:%[^ ]+]] = load i32, i32* [[Slot]]
+; CHECK: call void @h(i32 [[LoadX2]]
+; CHECK: [[EntryCopy]]:
+; CHECK: [[LoadX1:%[^ ]+]] = load i32, i32* [[Slot]]
+; CHECK: call void @h(i32 [[LoadX1]]
+
+
+define void @test2() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @f()
+ to label %exit unwind label %cleanup
+cleanup:
+ cleanuppad []
+ br label %exit
+exit:
+ call void @f()
+ ret void
+}
+; Need two copies of %exit's call to @f -- the subsequent ret is only
+; valid when coming from %entry, but on the path from %cleanup, this
+; might be a valid call to @f which might dynamically not return.
+; CHECK-LABEL: @test2(
+; CHECK: entry:
+; CHECK: invoke void @f()
+; CHECK: to label %[[exit:[^ ]+]] unwind label %cleanup
+; CHECK: cleanup:
+; CHECK: cleanuppad []
+; CHECK: call void @f()
+; CHECK-NEXT: unreachable
+; CHECK: [[exit]]:
+; CHECK: call void @f()
+; CHECK-NEXT: ret void
+
+
+define void @test3() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @f()
+ to label %invoke.cont unwind label %catch
+invoke.cont:
+ invoke void @f()
+ to label %exit unwind label %cleanup
+catch:
+ catchpad [] to label %shared unwind label %endcatch
+endcatch:
+ catchendpad unwind to caller
+cleanup:
+ cleanuppad []
+ br label %shared
+shared:
+ call void @f()
+ br label %exit
+exit:
+ ret void
+}
+; Need two copies of %shared's call to @f (similar to @test2 but
+; the two regions here are siblings, not parent-child).
+; CHECK-LABEL: @test3(
+; CHECK: invoke void @f()
+; CHECK: invoke void @f()
+; CHECK: to label %[[exit:[^ ]+]] unwind
+; CHECK: catch:
+; CHECK: catchpad [] to label %[[shared:[^ ]+]] unwind
+; CHECK: cleanup:
+; CHECK: cleanuppad []
+; CHECK: call void @f()
+; CHECK-NEXT: unreachable
+; CHECK: [[shared]]:
+; CHECK: call void @f()
+; CHECK-NEXT: unreachable
+; CHECK: [[exit]]:
+; CHECK: ret void
+
+
+define void @test4() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @f()
+ to label %shared unwind label %catch
+catch:
+ catchpad []
+ to label %shared unwind label %endcatch
+endcatch:
+ catchendpad unwind to caller
+shared:
+ %x = call i32 @g()
+ %i = call i32 @g()
+ %zero.trip = icmp eq i32 %i, 0
+ br i1 %zero.trip, label %exit, label %loop
+loop:
+ %i.loop = phi i32 [ %i, %shared ], [ %i.dec, %loop.tail ]
+ %b = call i1 @b()
+ br i1 %b, label %left, label %right
+left:
+ %y = call i32 @g()
+ br label %loop.tail
+right:
+ call void @h(i32 %x)
+ br label %loop.tail
+loop.tail:
+ %i.dec = sub i32 %i.loop, 1
+ %done = icmp eq i32 %i.dec, 0
+ br i1 %done, label %exit, label %loop
+exit:
+ call void @h(i32 %x)
+ unreachable
+}
+; Make sure we can clone regions that have internal control
+; flow and SSA values. Here we need two copies of everything
+; from %shared to %exit.
+; CHECK-LABEL: @test4(
+; CHECK: entry:
+; CHECK: to label %[[shared_E:[^ ]+]] unwind label %catch
+; CHECK: catch:
+; CHECK: to label %[[shared_C:[^ ]+]] unwind label %endcatch
+; CHECK: [[shared_C]]:
+; CHECK: [[x_C:%[^ ]+]] = call i32 @g()
+; CHECK: [[i_C:%[^ ]+]] = call i32 @g()
+; CHECK: [[zt_C:%[^ ]+]] = icmp eq i32 [[i_C]], 0
+; CHECK: br i1 [[zt_C]], label %[[exit_C:[^ ]+]], label %[[loop_C:[^ ]+]]
+; CHECK: [[shared_E]]:
+; CHECK: [[x_E:%[^ ]+]] = call i32 @g()
+; CHECK: [[i_E:%[^ ]+]] = call i32 @g()
+; CHECK: [[zt_E:%[^ ]+]] = icmp eq i32 [[i_E]], 0
+; CHECK: br i1 [[zt_E]], label %[[exit_E:[^ ]+]], label %[[loop_E:[^ ]+]]
+; CHECK: [[loop_C]]:
+; CHECK: [[iloop_C:%[^ ]+]] = phi i32 [ [[i_C]], %[[shared_C]] ], [ [[idec_C:%[^ ]+]], %[[looptail_C:[^ ]+]] ]
+; CHECK: [[b_C:%[^ ]+]] = call i1 @b()
+; CHECK: br i1 [[b_C]], label %[[left_C:[^ ]+]], label %[[right_C:[^ ]+]]
+; CHECK: [[loop_E]]:
+; CHECK: [[iloop_E:%[^ ]+]] = phi i32 [ [[i_E]], %[[shared_E]] ], [ [[idec_E:%[^ ]+]], %[[looptail_E:[^ ]+]] ]
+; CHECK: [[b_E:%[^ ]+]] = call i1 @b()
+; CHECK: br i1 [[b_E]], label %[[left_E:[^ ]+]], label %[[right_E:[^ ]+]]
+; CHECK: [[left_C]]:
+; CHECK: [[y_C:%[^ ]+]] = call i32 @g()
+; CHECK br label %[[looptail_C]]
+; CHECK: [[left_E]]:
+; CHECK: [[y_E:%[^ ]+]] = call i32 @g()
+; CHECK br label %[[looptail_E]]
+; CHECK: [[right_C]]:
+; CHECK: call void @h(i32 [[x_C]])
+; CHECK: br label %[[looptail_C]]
+; CHECK: [[right_E]]:
+; CHECK: call void @h(i32 [[x_E]])
+; CHECK: br label %[[looptail_E]]
+; CHECK: [[looptail_C]]:
+; CHECK: [[idec_C]] = sub i32 [[iloop_C]], 1
+; CHECK: [[done_C:%[^ ]+]] = icmp eq i32 [[idec_C]], 0
+; CHECK: br i1 [[done_C]], label %[[exit_C]], label %[[loop_C]]
+; CHECK: [[looptail_E]]:
+; CHECK: [[idec_E]] = sub i32 [[iloop_E]], 1
+; CHECK: [[done_E:%[^ ]+]] = icmp eq i32 [[idec_E]], 0
+; CHECK: br i1 [[done_E]], label %[[exit_E]], label %[[loop_E]]
+; CHECK: [[exit_C]]:
+; CHECK: call void @h(i32 [[x_C]])
+; CHECK: unreachable
+; CHECK: [[exit_E]]:
+; CHECK: call void @h(i32 [[x_E]])
+; CHECK: unreachable
+
+
+define void @test5() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @f()
+ to label %exit unwind label %outer
+outer:
+ %o = cleanuppad []
+ %x = call i32 @g()
+ invoke void @f()
+ to label %outer.ret unwind label %inner
+inner:
+ %i = catchpad []
+ to label %inner.catch unwind label %inner.endcatch
+inner.catch:
+ catchret %i to label %outer.post-inner
+inner.endcatch:
+ catchendpad unwind to caller
+outer.post-inner:
+ call void @h(i32 %x)
+ br label %outer.ret
+outer.ret:
+ cleanupret %o unwind to caller
+exit:
+ ret void
+}
+; Simple nested case (catch-inside-cleanup). Nothing needs
+; to be cloned. The def and use of %x are both in %outer
+; and so don't need to be spilled.
+; CHECK-LABEL: @test5(
+; CHECK: outer:
+; CHECK: %x = call i32 @g()
+; CHECK-NEXT: invoke void @f()
+; CHECK-NEXT: to label %outer.ret unwind label %inner
+; CHECK: inner:
+; CHECK: to label %inner.catch unwind label %inner.endcatch
+; CHECK: inner.catch:
+; CHECK-NEXT: catchret %i to label %outer.post-inner
+; CHECK: outer.post-inner:
+; CHECK-NEXT: call void @h(i32 %x)
+; CHECK-NEXT: br label %outer.ret
+
+
+define void @test6() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @f()
+ to label %invoke.cont unwind label %left
+invoke.cont:
+ invoke void @f()
+ to label %exit unwind label %right
+left:
+ cleanuppad []
+ br label %shared
+right:
+ catchpad []
+ to label %right.catch unwind label %right.end
+right.catch:
+ br label %shared
+right.end:
+ catchendpad unwind to caller
+shared:
+ %x = call i32 @g()
+ invoke void @f()
+ to label %shared.cont unwind label %inner
+shared.cont:
+ unreachable
+inner:
+ %i = cleanuppad []
+ call void @h(i32 %x)
+ cleanupret %i unwind label %right.end
+exit:
+ ret void
+}
+; %inner is a cleanup which appears both as a child of
+; %left and as a child of %right. Since statically we
+; need each funclet to have a single parent, we need to
+; clone the entire %inner funclet so we can have one
+; copy under each parent. The cleanupret in %inner
+; unwinds to the catchendpad for %right, so the copy
+; of %inner under %right should include it; the copy
+; of %inner under %left should instead have an
+; `unreachable` inserted there, but the copy under
+; %left still needs to be created because it's possible
+; the dynamic path enters %left, then enters %inner,
+; then calls @h, and that the call to @h doesn't return.
+; CHECK-LABEL: @test6(
+; TODO: CHECKs
+
+
+define void @test7() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @f()
+ to label %invoke.cont unwind label %left
+invoke.cont:
+ invoke void @f()
+ to label %unreachable unwind label %right
+left:
+ cleanuppad []
+ invoke void @f() to label %unreachable unwind label %inner
+right:
+ catchpad []
+ to label %right.catch unwind label %right.end
+right.catch:
+ invoke void @f() to label %unreachable unwind label %inner
+right.end:
+ catchendpad unwind to caller
+inner:
+ %i = cleanuppad []
+ %x = call i32 @g()
+ call void @h(i32 %x)
+ cleanupret %i unwind label %right.end
+unreachable:
+ unreachable
+}
+; Another case of a two-parent child (like @test6), this time
+; with the join at the entry itself instead of following a
+; non-pad join.
+; CHECK-LABEL: @test7(
+; TODO: CHECKs
+
+
+define void @test8() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @f()
+ to label %invoke.cont unwind label %left
+invoke.cont:
+ invoke void @f()
+ to label %unreachable unwind label %right
+left:
+ cleanuppad []
+ br label %shared
+right:
+ catchpad []
+ to label %right.catch unwind label %right.end
+right.catch:
+ br label %shared
+right.end:
+ catchendpad unwind to caller
+shared:
+ invoke void @f()
+ to label %unreachable unwind label %inner
+inner:
+ cleanuppad []
+ invoke void @f()
+ to label %unreachable unwind label %inner.child
+inner.child:
+ cleanuppad []
+ %x = call i32 @g()
+ call void @h(i32 %x)
+ unreachable
+unreachable:
+ unreachable
+}
+; %inner is a two-parent child which itself has a child; need
+; to make two copies of both the %inner and %inner.child.
+; CHECK-LABEL: @test8(
+; TODO: CHECKs
+
+
+define void @test9() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @f()
+ to label %invoke.cont unwind label %left
+invoke.cont:
+ invoke void @f()
+ to label %unreachable unwind label %right
+left:
+ cleanuppad []
+ call void @h(i32 1)
+ invoke void @f()
+ to label %unreachable unwind label %right
+right:
+ cleanuppad []
+ call void @h(i32 2)
+ invoke void @f()
+ to label %unreachable unwind label %left
+unreachable:
+ unreachable
+}
+; This is an irreducible loop with two funclets that enter each other;
+; need to make two copies of each funclet (one a child of root, the
+; other a child of the opposite funclet), but also make sure not to
+; clone self-descendants (if we tried to do that we'd need to make an
+; infinite number of them). Presumably if optimizations ever generated
+; such a thing it would mean that one of the two cleanups was originally
+; the parent of the other, but that we'd somehow lost track in the CFG
+; of which was which along the way; generating each possibility lets
+; whichever case was correct execute correctly.
+; CHECK-LABEL: @test9(
+; TODO: CHECKs