357 lines
10 KiB
LLVM
357 lines
10 KiB
LLVM
; RUN: opt -mtriple=x86_64-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 @i()
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declare void @llvm.bar() nounwind
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; CHECK-LABEL: @test1(
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define void @test1(i1 %B) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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; Spill slot should be inserted here
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; CHECK: [[Slot:%[^ ]+]] = alloca
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; Can't store for %phi at these defs because the lifetimes overlap
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; CHECK-NOT: store
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%x = call i32 @g()
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%y = call i32 @g()
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br i1 %B, label %left, label %right
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left:
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; CHECK: left:
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; CHECK-NEXT: store i32 %x, i32* [[Slot]]
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; CHECK-NEXT: invoke void @f
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invoke void @f()
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to label %exit unwind label %merge
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right:
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; CHECK: right:
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; CHECK-NEXT: store i32 %y, i32* [[Slot]]
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; CHECK-NEXT: invoke void @f
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invoke void @f()
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to label %exit unwind label %merge
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merge:
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; CHECK: merge:
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; CHECK-NOT: = phi
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%phi = phi i32 [ %x, %left ], [ %y, %right ]
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%cs1 = catchswitch within none [label %catch] unwind to caller
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catch:
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%cp = catchpad within %cs1 []
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; CHECK: catch:
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; CHECK: [[Reload:%[^ ]+]] = load i32, i32* [[Slot]]
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; CHECK-NEXT: call void @h(i32 [[Reload]])
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call void @h(i32 %phi) [ "funclet"(token %cp) ]
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catchret from %cp to label %exit
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exit:
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ret void
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}
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; CHECK-LABEL: @test2(
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define void @test2(i1 %B) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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br i1 %B, label %left, label %right
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left:
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; Need two stores here because %x and %y interfere so they need 2 slots
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; CHECK: left:
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; CHECK: store i32 1, i32* [[Slot1:%[^ ]+]]
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; CHECK: store i32 1, i32* [[Slot2:%[^ ]+]]
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; CHECK-NEXT: invoke void @f
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invoke void @f()
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to label %exit unwind label %merge.inner
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right:
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; Need two stores here because %x and %y interfere so they need 2 slots
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; CHECK: right:
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; CHECK-DAG: store i32 2, i32* [[Slot1]]
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; CHECK-DAG: store i32 2, i32* [[Slot2]]
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; CHECK: invoke void @f
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invoke void @f()
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to label %exit unwind label %merge.inner
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merge.inner:
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; CHECK: merge.inner:
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; CHECK-NOT: = phi
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; CHECK: catchswitch within none
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%x = phi i32 [ 1, %left ], [ 2, %right ]
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%cs1 = catchswitch within none [label %catch.inner] unwind label %merge.outer
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catch.inner:
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%cpinner = catchpad within %cs1 []
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; Need just one store here because only %y is affected
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; CHECK: catch.inner:
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%z = call i32 @g() [ "funclet"(token %cpinner) ]
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; CHECK: store i32 %z
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; CHECK-NEXT: invoke void @f
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invoke void @f() [ "funclet"(token %cpinner) ]
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to label %catchret.inner unwind label %merge.outer
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catchret.inner:
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catchret from %cpinner to label %exit
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merge.outer:
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%y = phi i32 [ %x, %merge.inner ], [ %z, %catch.inner ]
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; CHECK: merge.outer:
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; CHECK-NOT: = phi
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; CHECK: catchswitch within none
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%cs2 = catchswitch within none [label %catch.outer] unwind to caller
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catch.outer:
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%cpouter = catchpad within %cs2 []
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; CHECK: catch.outer:
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; CHECK: [[CatchPad:%[^ ]+]] = catchpad within %cs2 []
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; Need to load x and y from two different slots since they're both live
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; and can have different values (if we came from catch.inner)
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; CHECK-DAG: load i32, i32* [[Slot1]]
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; CHECK-DAG: load i32, i32* [[Slot2]]
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; CHECK: catchret from [[CatchPad]] to label
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call void @h(i32 %x) [ "funclet"(token %cpouter) ]
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call void @h(i32 %y) [ "funclet"(token %cpouter) ]
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catchret from %cpouter to label %exit
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exit:
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ret void
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}
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; test4: don't need stores for %phi.inner, as its only use is to feed %phi.outer
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; %phi.outer needs stores in %left, %right, and %join
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; CHECK-LABEL: @test4(
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define void @test4(i1 %B) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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; CHECK: entry:
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; CHECK: [[Slot:%[^ ]+]] = alloca
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; CHECK-NEXT: br
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br i1 %B, label %left, label %right
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left:
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; CHECK: left:
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; CHECK-NOT: store
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; CHECK: store i32 %l, i32* [[Slot]]
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; CHECK-NEXT: invoke void @f
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%l = call i32 @g()
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invoke void @f()
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to label %join unwind label %catchpad.inner
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right:
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; CHECK: right:
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; CHECK-NOT: store
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; CHECK: store i32 %r, i32* [[Slot]]
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; CHECK-NEXT: invoke void @f
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%r = call i32 @g()
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invoke void @f()
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to label %join unwind label %catchpad.inner
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catchpad.inner:
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; CHECK: catchpad.inner:
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; CHECK-NEXT: catchswitch within none
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%phi.inner = phi i32 [ %l, %left ], [ %r, %right ]
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%cs1 = catchswitch within none [label %catch.inner] unwind label %catchpad.outer
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catch.inner:
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%cp1 = catchpad within %cs1 []
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catchret from %cp1 to label %join
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join:
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; CHECK: join:
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; CHECK-NOT: store
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; CHECK: store i32 %j, i32* [[Slot]]
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; CHECK-NEXT: invoke void @f
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%j = call i32 @g()
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invoke void @f()
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to label %exit unwind label %catchpad.outer
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catchpad.outer:
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; CHECK: catchpad.outer:
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; CHECK-NEXT: catchswitch within none
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%phi.outer = phi i32 [ %phi.inner, %catchpad.inner ], [ %j, %join ]
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%cs2 = catchswitch within none [label %catch.outer] unwind to caller
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catch.outer:
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; CHECK: catch.outer:
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; CHECK: [[Reload:%[^ ]+]] = load i32, i32* [[Slot]]
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; CHECK: call void @h(i32 [[Reload]])
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%cp2 = catchpad within %cs2 []
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call void @h(i32 %phi.outer) [ "funclet"(token %cp2) ]
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catchret from %cp2 to label %exit
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exit:
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ret void
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}
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; CHECK-LABEL: @test5(
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define void @test5() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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; need store for %phi.cleanup
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; CHECK: entry:
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; CHECK: store i32 1, i32* [[CleanupSlot:%[^ ]+]]
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; CHECK-NEXT: invoke void @f
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invoke void @f()
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to label %invoke.cont unwind label %cleanup
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invoke.cont:
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; need store for %phi.cleanup
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; CHECK: invoke.cont:
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; CHECK-NEXT: store i32 2, i32* [[CleanupSlot]]
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; CHECK-NEXT: invoke void @f
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invoke void @f()
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to label %invoke.cont2 unwind label %cleanup
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cleanup:
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; cleanup phi can be loaded at cleanup entry
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; CHECK: cleanup:
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; CHECK-NEXT: cleanuppad within none []
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; CHECK: [[CleanupReload:%[^ ]+]] = load i32, i32* [[CleanupSlot]]
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%phi.cleanup = phi i32 [ 1, %entry ], [ 2, %invoke.cont ]
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%cp = cleanuppad within none []
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%b = call i1 @i() [ "funclet"(token %cp) ]
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br i1 %b, label %left, label %right
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left:
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; CHECK: left:
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; CHECK: call void @h(i32 [[CleanupReload]]
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call void @h(i32 %phi.cleanup) [ "funclet"(token %cp) ]
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br label %merge
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right:
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; CHECK: right:
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; CHECK: call void @h(i32 [[CleanupReload]]
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call void @h(i32 %phi.cleanup) [ "funclet"(token %cp) ]
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br label %merge
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merge:
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; need store for %phi.catch
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; CHECK: merge:
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; CHECK-NEXT: store i32 [[CleanupReload]], i32* [[CatchSlot:%[^ ]+]]
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; CHECK-NEXT: cleanupret
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cleanupret from %cp unwind label %catchswitch
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invoke.cont2:
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; need store for %phi.catch
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; CHECK: invoke.cont2:
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; CHECK-NEXT: store i32 3, i32* [[CatchSlot]]
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; CHECK-NEXT: invoke void @f
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invoke void @f()
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to label %exit unwind label %catchswitch
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catchswitch:
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; CHECK: catchswitch:
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; CHECK-NEXT: catchswitch within none
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%phi.catch = phi i32 [ %phi.cleanup, %merge ], [ 3, %invoke.cont2 ]
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%cs1 = catchswitch within none [label %catch] unwind to caller
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catch:
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; CHECK: catch:
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; CHECK: catchpad within %cs1
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; CHECK: [[CatchReload:%[^ ]+]] = load i32, i32* [[CatchSlot]]
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; CHECK: call void @h(i32 [[CatchReload]]
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%cp2 = catchpad within %cs1 []
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call void @h(i32 %phi.catch) [ "funclet"(token %cp2) ]
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catchret from %cp2 to label %exit
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exit:
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ret void
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}
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; We used to demote %x, but we don't need to anymore.
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; CHECK-LABEL: @test6(
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define void @test6() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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; CHECK: entry:
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; CHECK: %x = invoke i32 @g()
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; CHECK-NEXT: to label %loop unwind label %to_caller
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%x = invoke i32 @g()
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to label %loop unwind label %to_caller
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to_caller:
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%cp1 = cleanuppad within none []
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cleanupret from %cp1 unwind to caller
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loop:
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invoke void @f()
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to label %loop unwind label %cleanup
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cleanup:
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; CHECK: cleanup:
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; CHECK: call void @h(i32 %x)
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%cp2 = cleanuppad within none []
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call void @h(i32 %x) [ "funclet"(token %cp2) ]
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cleanupret from %cp2 unwind to caller
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}
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; CHECK-LABEL: @test7(
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define void @test7() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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; %x is an EH pad phi, so gets stored in pred here
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; CHECK: entry:
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; CHECK: store i32 1, i32* [[SlotX:%[^ ]+]]
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; CHECK: invoke void @f()
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invoke void @f()
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to label %invoke.cont unwind label %catchpad
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invoke.cont:
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; %x is an EH pad phi, so gets stored in pred here
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; CHECK: invoke.cont:
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; CHECK: store i32 2, i32* [[SlotX]]
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; CHECK: invoke void @f()
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invoke void @f()
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to label %exit unwind label %catchpad
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catchpad:
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; %x phi should be eliminated
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; CHECK: catchpad:
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; CHECK-NEXT: catchswitch within none
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%x = phi i32 [ 1, %entry ], [ 2, %invoke.cont ]
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%cs1 = catchswitch within none [label %catch] unwind to caller
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catch:
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; CHECK: catch:
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; CHECK-NEXT: %[[CatchPad:[^ ]+]] = catchpad within %cs1 []
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%cp = catchpad within %cs1 []
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%b = call i1 @i() [ "funclet"(token %cp) ]
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br i1 %b, label %left, label %right
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left:
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; Edge from %left to %join needs to be split so that
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; the load of %x can be inserted *after* the catchret
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; CHECK: left:
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; CHECK-NEXT: catchret from %[[CatchPad]] to label %[[SplitLeft:[^ ]+]]
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catchret from %cp to label %join
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; CHECK: [[SplitLeft]]:
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; CHECK: [[LoadX:%[^ ]+]] = load i32, i32* [[SlotX]]
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; CHECK: br label %join
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right:
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; Edge from %right to %join needs to be split so that
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; the load of %y can be inserted *after* the catchret
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; CHECK: right:
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; CHECK: %y = call i32 @g()
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; CHECK: catchret from %[[CatchPad]] to label %join
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%y = call i32 @g() [ "funclet"(token %cp) ]
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catchret from %cp to label %join
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join:
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; CHECK: join:
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; CHECK: %phi = phi i32 [ [[LoadX]], %[[SplitLeft]] ], [ %y, %right ]
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%phi = phi i32 [ %x, %left ], [ %y, %right ]
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call void @h(i32 %phi)
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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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; CHECK-LABEL: @test8(
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define void @test8() personality i32 (...)* @__CxxFrameHandler3 { entry:
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invoke void @f()
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to label %done unwind label %cleanup1
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invoke void @f()
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to label %done unwind label %cleanup2
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done:
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ret void
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cleanup1:
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; CHECK: [[CleanupPad1:%[^ ]+]] = cleanuppad within none []
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; CHECK-NEXT: call void @llvm.bar()
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; CHECK-NEXT: cleanupret from [[CleanupPad1]]
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%cp0 = cleanuppad within none []
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br label %cleanupexit
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cleanup2:
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; CHECK: cleanuppad within none []
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; CHECK-NEXT: call void @llvm.bar()
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; CHECK-NEXT: unreachable
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%cp1 = cleanuppad within none []
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br label %cleanupexit
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cleanupexit:
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call void @llvm.bar()
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cleanupret from %cp0 unwind label %cleanup2
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}
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