forked from OSchip/llvm-project
455 lines
13 KiB
LLVM
455 lines
13 KiB
LLVM
; RUN: opt -mtriple=x86_x64-pc-windows-msvc -S -winehprepare < %s | FileCheck %s
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declare i32 @__CxxFrameHandler3(...)
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declare void @f()
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declare i32 @g()
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declare void @h(i32)
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declare i1 @b()
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define void @test1() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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; %x def colors: {entry} subset of use colors; must spill
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%x = call i32 @g()
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invoke void @f()
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to label %noreturn unwind label %catch
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catch:
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catchpad []
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to label %noreturn unwind label %endcatch
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noreturn:
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; %x use colors: {entry, cleanup}
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call void @h(i32 %x)
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unreachable
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endcatch:
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catchendpad unwind to caller
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}
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; Need two copies of the call to @h, one under entry and one under catch.
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; Currently we generate a load for each, though we shouldn't need one
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; for the use in entry's copy.
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; CHECK-LABEL: define void @test1(
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; CHECK: entry:
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; CHECK: store i32 %x, i32* [[Slot:%[^ ]+]]
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; CHECK: invoke void @f()
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; CHECK: to label %[[EntryCopy:[^ ]+]] unwind label %catch
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; CHECK: catch:
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; CHECK: catchpad []
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; CHECK-NEXT: to label %[[CatchCopy:[^ ]+]] unwind
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; CHECK: [[CatchCopy]]:
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; CHECK: [[LoadX2:%[^ ]+]] = load i32, i32* [[Slot]]
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; CHECK: call void @h(i32 [[LoadX2]]
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; CHECK: [[EntryCopy]]:
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; CHECK: [[LoadX1:%[^ ]+]] = load i32, i32* [[Slot]]
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; CHECK: call void @h(i32 [[LoadX1]]
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define void @test2() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %exit unwind label %cleanup
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cleanup:
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cleanuppad []
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br label %exit
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exit:
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call void @f()
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ret void
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}
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; Need two copies of %exit's call to @f -- the subsequent ret is only
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; valid when coming from %entry, but on the path from %cleanup, this
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; might be a valid call to @f which might dynamically not return.
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; CHECK-LABEL: define void @test2(
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; CHECK: entry:
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; CHECK: invoke void @f()
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; CHECK: to label %[[exit:[^ ]+]] unwind label %cleanup
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; CHECK: cleanup:
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; CHECK: cleanuppad []
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; CHECK: call void @f()
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; CHECK-NEXT: unreachable
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; CHECK: [[exit]]:
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; CHECK: call void @f()
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; CHECK-NEXT: ret void
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define void @test3() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %invoke.cont unwind label %catch
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invoke.cont:
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invoke void @f()
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to label %exit unwind label %cleanup
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catch:
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catchpad [] to label %shared unwind label %endcatch
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endcatch:
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catchendpad unwind to caller
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cleanup:
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cleanuppad []
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br label %shared
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shared:
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call void @f()
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br label %exit
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exit:
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ret void
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}
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; Need two copies of %shared's call to @f (similar to @test2 but
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; the two regions here are siblings, not parent-child).
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; CHECK-LABEL: define void @test3(
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; CHECK: invoke void @f()
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; CHECK: invoke void @f()
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; CHECK: to label %[[exit:[^ ]+]] unwind
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; CHECK: catch:
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; CHECK: catchpad []
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; CHECK-NEXT: to label %[[shared:[^ ]+]] unwind
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; CHECK: cleanup:
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; CHECK: cleanuppad []
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; CHECK: call void @f()
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; CHECK-NEXT: unreachable
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; CHECK: [[shared]]:
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; CHECK: call void @f()
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; CHECK-NEXT: unreachable
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; CHECK: [[exit]]:
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; CHECK: ret void
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define void @test4() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %shared unwind label %catch
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catch:
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catchpad []
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to label %shared unwind label %endcatch
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endcatch:
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catchendpad unwind to caller
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shared:
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%x = call i32 @g()
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%i = call i32 @g()
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%zero.trip = icmp eq i32 %i, 0
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br i1 %zero.trip, label %exit, label %loop
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loop:
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%i.loop = phi i32 [ %i, %shared ], [ %i.dec, %loop.tail ]
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%b = call i1 @b()
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br i1 %b, label %left, label %right
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left:
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%y = call i32 @g()
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br label %loop.tail
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right:
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call void @h(i32 %x)
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br label %loop.tail
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loop.tail:
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%i.dec = sub i32 %i.loop, 1
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%done = icmp eq i32 %i.dec, 0
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br i1 %done, label %exit, label %loop
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exit:
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call void @h(i32 %x)
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unreachable
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}
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; Make sure we can clone regions that have internal control
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; flow and SSA values. Here we need two copies of everything
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; from %shared to %exit.
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; CHECK-LABEL: define void @test4(
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; CHECK: entry:
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; CHECK: to label %[[shared_E:[^ ]+]] unwind label %catch
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; CHECK: catch:
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; CHECK: to label %[[shared_C:[^ ]+]] unwind label %endcatch
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; CHECK: [[shared_C]]:
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; CHECK: [[x_C:%[^ ]+]] = call i32 @g()
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; CHECK: [[i_C:%[^ ]+]] = call i32 @g()
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; CHECK: [[zt_C:%[^ ]+]] = icmp eq i32 [[i_C]], 0
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; CHECK: br i1 [[zt_C]], label %[[exit_C:[^ ]+]], label %[[loop_C:[^ ]+]]
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; CHECK: [[shared_E]]:
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; CHECK: [[x_E:%[^ ]+]] = call i32 @g()
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; CHECK: [[i_E:%[^ ]+]] = call i32 @g()
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; CHECK: [[zt_E:%[^ ]+]] = icmp eq i32 [[i_E]], 0
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; CHECK: br i1 [[zt_E]], label %[[exit_E:[^ ]+]], label %[[loop_E:[^ ]+]]
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; CHECK: [[loop_C]]:
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; CHECK: [[iloop_C:%[^ ]+]] = phi i32 [ [[i_C]], %[[shared_C]] ], [ [[idec_C:%[^ ]+]], %[[looptail_C:[^ ]+]] ]
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; CHECK: [[b_C:%[^ ]+]] = call i1 @b()
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; CHECK: br i1 [[b_C]], label %[[left_C:[^ ]+]], label %[[right_C:[^ ]+]]
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; CHECK: [[loop_E]]:
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; CHECK: [[iloop_E:%[^ ]+]] = phi i32 [ [[i_E]], %[[shared_E]] ], [ [[idec_E:%[^ ]+]], %[[looptail_E:[^ ]+]] ]
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; CHECK: [[b_E:%[^ ]+]] = call i1 @b()
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; CHECK: br i1 [[b_E]], label %[[left_E:[^ ]+]], label %[[right_E:[^ ]+]]
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; CHECK: [[left_C]]:
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; CHECK: [[y_C:%[^ ]+]] = call i32 @g()
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; CHECK: br label %[[looptail_C]]
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; CHECK: [[left_E]]:
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; CHECK: [[y_E:%[^ ]+]] = call i32 @g()
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; CHECK: br label %[[looptail_E]]
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; CHECK: [[right_C]]:
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; CHECK: call void @h(i32 [[x_C]])
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; CHECK: br label %[[looptail_C]]
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; CHECK: [[right_E]]:
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; CHECK: call void @h(i32 [[x_E]])
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; CHECK: br label %[[looptail_E]]
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; CHECK: [[looptail_C]]:
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; CHECK: [[idec_C]] = sub i32 [[iloop_C]], 1
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; CHECK: [[done_C:%[^ ]+]] = icmp eq i32 [[idec_C]], 0
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; CHECK: br i1 [[done_C]], label %[[exit_C]], label %[[loop_C]]
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; CHECK: [[looptail_E]]:
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; CHECK: [[idec_E]] = sub i32 [[iloop_E]], 1
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; CHECK: [[done_E:%[^ ]+]] = icmp eq i32 [[idec_E]], 0
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; CHECK: br i1 [[done_E]], label %[[exit_E]], label %[[loop_E]]
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; CHECK: [[exit_C]]:
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; CHECK: call void @h(i32 [[x_C]])
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; CHECK: unreachable
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; CHECK: [[exit_E]]:
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; CHECK: call void @h(i32 [[x_E]])
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; CHECK: unreachable
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define void @test5() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %exit unwind label %outer
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outer:
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%o = cleanuppad []
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%x = call i32 @g()
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invoke void @f()
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to label %outer.ret unwind label %inner
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inner:
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%i = catchpad []
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to label %inner.catch unwind label %inner.endcatch
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inner.catch:
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catchret %i to label %outer.post-inner
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inner.endcatch:
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catchendpad unwind to caller
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outer.post-inner:
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call void @h(i32 %x)
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br label %outer.ret
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outer.ret:
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cleanupret %o unwind to caller
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exit:
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ret void
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}
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; Simple nested case (catch-inside-cleanup). Nothing needs
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; to be cloned. The def and use of %x are both in %outer
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; and so don't need to be spilled.
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; CHECK-LABEL: define void @test5(
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; CHECK: outer:
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; CHECK: %x = call i32 @g()
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; CHECK-NEXT: invoke void @f()
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; CHECK-NEXT: to label %outer.ret unwind label %inner
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; CHECK: inner:
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; CHECK: to label %inner.catch unwind label %inner.endcatch
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; CHECK: inner.catch:
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; CHECK-NEXT: catchret %i to label %outer.post-inner
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; CHECK: outer.post-inner:
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; CHECK-NEXT: call void @h(i32 %x)
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; CHECK-NEXT: br label %outer.ret
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define void @test6() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %invoke.cont unwind label %left
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invoke.cont:
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invoke void @f()
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to label %exit unwind label %right
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left:
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cleanuppad []
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br label %shared
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right:
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catchpad []
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to label %right.catch unwind label %right.end
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right.catch:
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br label %shared
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right.end:
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catchendpad unwind to caller
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shared:
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%x = call i32 @g()
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invoke void @f()
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to label %shared.cont unwind label %inner
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shared.cont:
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unreachable
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inner:
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%i = cleanuppad []
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call void @h(i32 %x)
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cleanupret %i unwind label %right.end
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exit:
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ret void
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}
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; %inner is a cleanup which appears both as a child of
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; %left and as a child of %right. Since statically we
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; need each funclet to have a single parent, we need to
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; clone the entire %inner funclet so we can have one
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; copy under each parent. The cleanupret in %inner
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; unwinds to the catchendpad for %right, so the copy
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; of %inner under %right should include it; the copy
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; of %inner under %left should instead have an
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; `unreachable` inserted there, but the copy under
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; %left still needs to be created because it's possible
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; the dynamic path enters %left, then enters %inner,
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; then calls @h, and that the call to @h doesn't return.
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; CHECK-LABEL: define void @test6(
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; TODO: CHECKs
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define void @test7() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %invoke.cont unwind label %left
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invoke.cont:
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invoke void @f()
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to label %unreachable unwind label %right
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left:
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cleanuppad []
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invoke void @f() to label %unreachable unwind label %inner
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right:
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catchpad []
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to label %right.catch unwind label %right.end
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right.catch:
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invoke void @f() to label %unreachable unwind label %inner
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right.end:
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catchendpad unwind to caller
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inner:
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%i = cleanuppad []
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%x = call i32 @g()
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call void @h(i32 %x)
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cleanupret %i unwind label %right.end
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unreachable:
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unreachable
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}
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; Another case of a two-parent child (like @test6), this time
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; with the join at the entry itself instead of following a
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; non-pad join.
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; CHECK-LABEL: define void @test7(
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; TODO: CHECKs
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define void @test8() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %invoke.cont unwind label %left
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invoke.cont:
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invoke void @f()
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to label %unreachable unwind label %right
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left:
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cleanuppad []
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br label %shared
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right:
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catchpad []
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to label %right.catch unwind label %right.end
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right.catch:
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br label %shared
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right.end:
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catchendpad unwind to caller
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shared:
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invoke void @f()
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to label %unreachable unwind label %inner
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inner:
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cleanuppad []
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invoke void @f()
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to label %unreachable unwind label %inner.child
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inner.child:
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cleanuppad []
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%x = call i32 @g()
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call void @h(i32 %x)
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unreachable
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unreachable:
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unreachable
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}
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; %inner is a two-parent child which itself has a child; need
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; to make two copies of both the %inner and %inner.child.
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; CHECK-LABEL: define void @test8(
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; TODO: CHECKs
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define void @test9() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %invoke.cont unwind label %left
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invoke.cont:
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invoke void @f()
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to label %unreachable unwind label %right
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left:
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cleanuppad []
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call void @h(i32 1)
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invoke void @f()
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to label %unreachable unwind label %right
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right:
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cleanuppad []
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call void @h(i32 2)
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invoke void @f()
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to label %unreachable unwind label %left
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unreachable:
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unreachable
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}
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; This is an irreducible loop with two funclets that enter each other;
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; need to make two copies of each funclet (one a child of root, the
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; other a child of the opposite funclet), but also make sure not to
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; clone self-descendants (if we tried to do that we'd need to make an
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; infinite number of them). Presumably if optimizations ever generated
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; such a thing it would mean that one of the two cleanups was originally
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; the parent of the other, but that we'd somehow lost track in the CFG
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; of which was which along the way; generating each possibility lets
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; whichever case was correct execute correctly.
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; CHECK-LABEL: define void @test9(
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; TODO: CHECKs
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define void @test10() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %unreachable unwind label %inner
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inner:
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%cleanup = cleanuppad []
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; make sure we don't overlook this cleanupret and try to process
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; successor %outer as a child of inner.
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cleanupret %cleanup unwind label %outer
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outer:
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%catch = catchpad [] to label %catch.body unwind label %endpad
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catch.body:
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catchret %catch to label %exit
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endpad:
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catchendpad unwind to caller
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exit:
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ret void
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unreachable:
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unreachable
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}
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; CHECK-LABEL: define void @test10(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: invoke
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; CHECK-NEXT: to label %unreachable unwind label %inner
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; CHECK: inner:
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; CHECK-NEXT: %cleanup = cleanuppad
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; CHECK-NEXT: cleanupret %cleanup unwind label %outer
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; CHECK: outer:
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; CHECK-NEXT: %catch = catchpad []
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; CHECK-NEXT: to label %catch.body unwind label %endpad
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; CHECK: catch.body:
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; CHECK-NEXT: catchret %catch to label %exit
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; CHECK: endpad:
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; CHECK-NEXT: catchendpad unwind to caller
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; CHECK: exit:
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; CHECK-NEXT: ret void
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define void @test11() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @f()
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to label %exit unwind label %cleanup.outer
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cleanup.outer:
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%outer = cleanuppad []
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invoke void @f()
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to label %outer.cont unwind label %cleanup.inner
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outer.cont:
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br label %merge
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cleanup.inner:
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%inner = cleanuppad []
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br label %merge
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merge:
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invoke void @f()
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to label %unreachable unwind label %merge.end
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unreachable:
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unreachable
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merge.end:
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cleanupendpad %outer unwind to caller
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exit:
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ret void
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}
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; merge.end will get cloned for outer and inner, but is implausible
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; from inner, so the invoke @f() in inner's copy of merge should be
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; rewritten to call @f()
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; CHECK-LABEL: define void @test11()
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; CHECK: %inner = cleanuppad []
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; CHECK-NEXT: call void @f()
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; CHECK-NEXT: unreachable
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