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https://github.com/RPCS3/llvm-mirror.git
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9ab21ae989
This avoids emitting code for unreachable landingpad blocks that contain calls to llvm.eh.actions and indirectbr. It's also a first step towards unifying the SEH and WinEH lowering codepaths. I'm keeping the old fan-in lowering of SEH around until the preparation version works well enough that we can switch over without breaking existing users. llvm-svn: 235037
204 lines
8.0 KiB
LLVM
204 lines
8.0 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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; This test case is equivalent to:
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; void f() {
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; try {
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; try {
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; may_throw();
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; } catch (int &) {
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; may_throw();
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; }
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; may_throw();
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; } catch (double) {
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; }
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; }
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%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
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%eh.CatchHandlerType = type { i32, i8* }
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$"\01??_R0N@8" = comdat any
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$"\01??_R0H@8" = comdat any
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@"\01??_7type_info@@6B@" = external constant i8*
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@"\01??_R0N@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".N\00" }, comdat
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@llvm.eh.handlertype.N.0 = private unnamed_addr constant %eh.CatchHandlerType { i32 0, i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0N@8" to i8*) }, section "llvm.metadata"
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@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
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@llvm.eh.handlertype.H.8 = private unnamed_addr constant %eh.CatchHandlerType { i32 8, i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*) }, section "llvm.metadata"
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define internal i8* @"\01?f@@YAXXZ.catch"(i8*, i8*) #4 {
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entry:
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%.i8 = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?f@@YAXXZ" to i8*), i8* %1, i32 0)
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%bc2 = bitcast i8* %.i8 to i32**
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%bc3 = bitcast i32** %bc2 to i8*
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invoke void @"\01?may_throw@@YAXXZ"()
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to label %invoke.cont2 unwind label %lpad1
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invoke.cont2: ; preds = %entry
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ret i8* blockaddress(@"\01?f@@YAXXZ", %try.cont)
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lpad1: ; preds = %entry
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%lp4 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
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cleanup
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catch %eh.CatchHandlerType* @llvm.eh.handlertype.N.0
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%recover = call i8* (...)* @llvm.eh.actions(i32 1, i8* bitcast (%eh.CatchHandlerType* @llvm.eh.handlertype.N.0 to i8*), i32 1, i8* (i8*, i8*)* @"\01?f@@YAXXZ.catch1")
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indirectbr i8* %recover, [label %invoke.cont2]
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}
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; CHECK-LABEL: "?f@@YAXXZ.catch":
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; No code should be generated for the indirectbr.
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; CHECK-NOT: jmpq *
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; CHECK: .seh_handlerdata
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; CHECK: .long ("$cppxdata$?f@@YAXXZ")@IMGREL
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define internal i8* @"\01?f@@YAXXZ.catch1"(i8*, i8*) #4 {
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entry:
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%.i8 = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?f@@YAXXZ" to i8*), i8* %1, i32 1)
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%2 = bitcast i8* %.i8 to double*
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%3 = bitcast double* %2 to i8*
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invoke void (...)* @llvm.donothing()
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to label %done unwind label %lpad
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done:
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ret i8* blockaddress(@"\01?f@@YAXXZ", %try.cont8)
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lpad: ; preds = %entry
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%4 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
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cleanup
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unreachable
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}
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; CHECK-LABEL: "?f@@YAXXZ.catch1":
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; No code should be generated for the indirectbr.
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; CHECK-NOT: jmpq *
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; CHECK: ".L?f@@YAXXZ.catch1$parent_frame_offset" = 16
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; CHECK: movq %rdx, 16(%rsp)
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; CHECK: .seh_handlerdata
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; CHECK: .long ("$cppxdata$?f@@YAXXZ")@IMGREL
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define void @"\01?f@@YAXXZ"() #0 {
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entry:
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%exn.slot = alloca i8*
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%ehselector.slot = alloca i32
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%0 = alloca i32*, align 8
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%1 = alloca double, align 8
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call void (...)* @llvm.frameescape(i32** %0, double* %1)
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invoke void @"\01?may_throw@@YAXXZ"()
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to label %invoke.cont unwind label %lpad2
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invoke.cont: ; preds = %entry
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br label %try.cont
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lpad2: ; preds = %entry
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%2 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
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catch %eh.CatchHandlerType* @llvm.eh.handlertype.H.8
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catch %eh.CatchHandlerType* @llvm.eh.handlertype.N.0
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%recover = call i8* (...)* @llvm.eh.actions(i32 1, i8* bitcast (%eh.CatchHandlerType* @llvm.eh.handlertype.H.8 to i8*), i32 0, i8* (i8*, i8*)* @"\01?f@@YAXXZ.catch", i32 1, i8* bitcast (%eh.CatchHandlerType* @llvm.eh.handlertype.N.0 to i8*), i32 1, i8* (i8*, i8*)* @"\01?f@@YAXXZ.catch1")
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indirectbr i8* %recover, [label %try.cont, label %try.cont8]
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try.cont: ; preds = %lpad2, %invoke.cont
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invoke void @"\01?may_throw@@YAXXZ"()
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to label %try.cont8 unwind label %lpad1
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lpad1:
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%3 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
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catch %eh.CatchHandlerType* @llvm.eh.handlertype.N.0
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%recover2 = call i8* (...)* @llvm.eh.actions(i32 1, i8* bitcast (%eh.CatchHandlerType* @llvm.eh.handlertype.N.0 to i8*), i32 1, i8* (i8*, i8*)* @"\01?f@@YAXXZ.catch1")
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indirectbr i8* %recover2, [label %try.cont8]
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try.cont8: ; preds = %lpad2, %try.cont
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ret void
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}
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; CHECK-LABEL: "?f@@YAXXZ":
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; No code should be generated for the indirectbr.
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; CHECK-NOT: jmpq *
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; CHECK: .seh_handlerdata
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; CHECK-NEXT: .long ("$cppxdata$?f@@YAXXZ")@IMGREL
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; CHECK-NEXT:"$cppxdata$?f@@YAXXZ":
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; CHECK-NEXT: .long 429065506
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; CHECK-NEXT: .long 4
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; CHECK-NEXT: .long ("$stateUnwindMap$?f@@YAXXZ")@IMGREL
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long ("$tryMap$?f@@YAXXZ")@IMGREL
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; CHECK-NEXT: .long 3
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; CHECK-NEXT: .long ("$ip2state$?f@@YAXXZ")@IMGREL
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; CHECK-NEXT: .long 32
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 1
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; CHECK-NEXT:"$stateUnwindMap$?f@@YAXXZ":
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; CHECK-NEXT: .long -1
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long -1
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; CHECK-NEXT: .long 0
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; CHECK-NEXT:"$tryMap$?f@@YAXXZ":
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long ("$handlerMap$0$?f@@YAXXZ")@IMGREL
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long 3
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long ("$handlerMap$1$?f@@YAXXZ")@IMGREL
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; CHECK-NEXT:"$handlerMap$0$?f@@YAXXZ":
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; CHECK-NEXT: .long 8
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; CHECK-NEXT: .long "??_R0H@8"@IMGREL
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; CHECK-NEXT: .long ".L?f@@YAXXZ$frame_escape_0"
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; CHECK-NEXT: .long "?f@@YAXXZ.catch"@IMGREL
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; CHECK-NEXT: .long ".L?f@@YAXXZ.catch$parent_frame_offset"
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; CHECK-NEXT:"$handlerMap$1$?f@@YAXXZ":
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long "??_R0N@8"@IMGREL
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; CHECK-NEXT: .long ".L?f@@YAXXZ$frame_escape_1"
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; CHECK-NEXT: .long "?f@@YAXXZ.catch1"@IMGREL
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; CHECK-NEXT: .long ".L?f@@YAXXZ.catch1$parent_frame_offset"
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; CHECK-NEXT:"$ip2state$?f@@YAXXZ":
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; CHECK-NEXT: .long .Ltmp0@IMGREL
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long .Ltmp13@IMGREL
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long .Ltmp16@IMGREL
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; CHECK-NEXT: .long 0
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declare void @"\01?may_throw@@YAXXZ"() #1
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declare i32 @__CxxFrameHandler3(...)
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; Function Attrs: nounwind readnone
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declare i32 @llvm.eh.typeid.for(i8*) #2
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; Function Attrs: nounwind
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declare void @llvm.eh.begincatch(i8* nocapture, i8* nocapture) #3
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; Function Attrs: nounwind
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declare void @llvm.eh.endcatch() #3
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; Function Attrs: nounwind
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declare i8* @llvm.eh.actions(...) #3
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; Function Attrs: nounwind
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declare void @llvm.frameescape(...) #3
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; Function Attrs: nounwind readnone
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declare i8* @llvm.framerecover(i8*, i8*, i32) #2
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declare void @llvm.donothing(...)
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attributes #0 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" "wineh-parent"="?f@@YAXXZ" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind }
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attributes #4 = { "wineh-parent"="?f@@YAXXZ" }
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