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llvm-6502/test/CodeGen/WinEH/cppeh-frame-vars.ll
Reid Kleckner df4fd4fc4e [WinEH] Make llvm.eh.actions use frameescape indices for catch params 
This makes it possible to use the same representation of llvm.eh.actions
in outlined handlers as we use in the parent function because i32's are
just constants that can be copied freely between functions.

I had to add a sentinel alloca to the list of child allocas so that we
don't try to sink the catch object into the handler. Normally, one would
use nullptr for this kind of thing, but TinyPtrVector doesn't support
null elements. More than that, it's elements have to have a suitable
alignment. Therefore, I settled on this for my sentinel:

  AllocaInst *getCatchObjectSentinel() {
    return static_cast<AllocaInst *>(nullptr) + 1;
  }

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233947 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-02 21:13:31 +00:00

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; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
; This test is based on the following code:
;
; struct SomeData {
; int a;
; int b;
; };
;
; void may_throw();
; void does_not_throw(int i);
; void dump(int *, int, SomeData&);
;
; void test() {
; int NumExceptions = 0;
; int ExceptionVal[10];
; SomeData Data = { 0, 0 };
;
; for (int i = 0; i < 10; ++i) {
; try {
; may_throw();
; Data.a += i;
; }
; catch (int e) {
; ExceptionVal[NumExceptions] = e;
; ++NumExceptions;
; if (e == i)
; Data.b += e;
; else
; Data.a += e;
; }
; does_not_throw(NumExceptions);
; }
; dump(ExceptionVal, NumExceptions, Data);
; }
; ModuleID = 'cppeh-frame-vars.cpp'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
%struct.SomeData = type { i32, i32 }
$"\01??_R0H@8" = comdat any
@"\01??_7type_info@@6B@" = external constant i8*
@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
; The function entry should be rewritten like this.
; CHECK: define void @"\01?test@@YAXXZ"()
; CHECK: entry:
; CHECK: [[NUMEXCEPTIONS_PTR:\%.+]] = alloca i32, align 4
; CHECK: [[EXCEPTIONVAL_PTR:\%.+]] = alloca [10 x i32], align 16
; CHECK: [[DATA_PTR:\%.+]] = alloca %struct.SomeData, align 4
; CHECK: [[I_PTR:\%.+]] = alloca i32, align 4
; CHECK: [[E_PTR:\%.+]] = alloca i32, align 4
; CHECK: store i32 0, i32* [[NUMEXCEPTIONS_PTR]], align 4
; CHECK: [[TMP:\%.+]] = bitcast %struct.SomeData* [[DATA_PTR]] to i8*
; CHECK: call void @llvm.memset(i8* [[TMP]], i8 0, i64 8, i32 4, i1 false)
; CHECK: store i32 0, i32* [[I_PTR]], align 4
; CHECK: call void (...)* @llvm.frameescape(i32* [[E_PTR]], i32* [[NUMEXCEPTIONS_PTR]], [10 x i32]* [[EXCEPTIONVAL_PTR]], i32* [[I_PTR]], %struct.SomeData* [[DATA_PTR]])
; CHECK: br label %for.cond
; Function Attrs: uwtable
define void @"\01?test@@YAXXZ"() #0 {
entry:
%NumExceptions = alloca i32, align 4
%ExceptionVal = alloca [10 x i32], align 16
%Data = alloca %struct.SomeData, align 4
%i = alloca i32, align 4
%exn.slot = alloca i8*
%ehselector.slot = alloca i32
%e = alloca i32, align 4
store i32 0, i32* %NumExceptions, align 4
%tmp = bitcast %struct.SomeData* %Data to i8*
call void @llvm.memset(i8* %tmp, i8 0, i64 8, i32 4, i1 false)
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%tmp1 = load i32, i32* %i, align 4
%cmp = icmp slt i32 %tmp1, 10
br i1 %cmp, label %for.body, label %for.end
; CHECK: for.body:
; CHECK: invoke void @"\01?may_throw@@YAXXZ"()
; CHECK: to label %invoke.cont unwind label %[[LPAD_LABEL:lpad[0-9]+]]
for.body: ; preds = %for.cond
invoke void @"\01?may_throw@@YAXXZ"()
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %for.body
%tmp2 = load i32, i32* %i, align 4
%a = getelementptr inbounds %struct.SomeData, %struct.SomeData* %Data, i32 0, i32 0
%tmp3 = load i32, i32* %a, align 4
%add = add nsw i32 %tmp3, %tmp2
store i32 %add, i32* %a, align 4
br label %try.cont
; CHECK: [[LPAD_LABEL]]:{{[ ]+}}; preds = %for.body
; CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
; CHECK-NEXT: catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
; CHECK-NEXT: [[RECOVER:\%.+]] = call i8* (...)* @llvm.eh.actions(i32 1, i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*), i32 0, i8* (i8*, i8*)* @"\01?test@@YAXXZ.catch")
; CHECK-NEXT: indirectbr i8* [[RECOVER]], [label %try.cont]
lpad: ; preds = %for.body
%tmp4 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
%tmp5 = extractvalue { i8*, i32 } %tmp4, 0
store i8* %tmp5, i8** %exn.slot
%tmp6 = extractvalue { i8*, i32 } %tmp4, 1
store i32 %tmp6, i32* %ehselector.slot
br label %catch.dispatch
; CHECK-NOT: catch.dispatch:
catch.dispatch: ; preds = %lpad
%sel = load i32, i32* %ehselector.slot
%tmp7 = call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)) #1
%matches = icmp eq i32 %sel, %tmp7
br i1 %matches, label %catch, label %eh.resume
; CHECK-NOT: catch:
catch: ; preds = %catch.dispatch
%exn = load i8*, i8** %exn.slot
%e.i8 = bitcast i32* %e to i8*
call void @llvm.eh.begincatch(i8* %exn, i8* %e.i8) #1
%tmp11 = load i32, i32* %e, align 4
%tmp12 = load i32, i32* %NumExceptions, align 4
%idxprom = sext i32 %tmp12 to i64
%arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* %ExceptionVal, i32 0, i64 %idxprom
store i32 %tmp11, i32* %arrayidx, align 4
%tmp13 = load i32, i32* %NumExceptions, align 4
%inc = add nsw i32 %tmp13, 1
store i32 %inc, i32* %NumExceptions, align 4
%tmp14 = load i32, i32* %e, align 4
%tmp15 = load i32, i32* %i, align 4
%cmp1 = icmp eq i32 %tmp14, %tmp15
br i1 %cmp1, label %if.then, label %if.else
; CHECK-NOT: if.then:
if.then: ; preds = %catch
%tmp16 = load i32, i32* %e, align 4
%b = getelementptr inbounds %struct.SomeData, %struct.SomeData* %Data, i32 0, i32 1
%tmp17 = load i32, i32* %b, align 4
%add2 = add nsw i32 %tmp17, %tmp16
store i32 %add2, i32* %b, align 4
br label %if.end
; CHECK-NOT: if.else:
if.else: ; preds = %catch
%tmp18 = load i32, i32* %e, align 4
%a3 = getelementptr inbounds %struct.SomeData, %struct.SomeData* %Data, i32 0, i32 0
%tmp19 = load i32, i32* %a3, align 4
%add4 = add nsw i32 %tmp19, %tmp18
store i32 %add4, i32* %a3, align 4
br label %if.end
; CHECK-NOT: if.end:
if.end: ; preds = %if.else, %if.then
call void @llvm.eh.endcatch() #1
br label %try.cont
try.cont: ; preds = %if.end, %invoke.cont
%tmp20 = load i32, i32* %NumExceptions, align 4
call void @"\01?does_not_throw@@YAXH@Z"(i32 %tmp20)
br label %for.inc
for.inc: ; preds = %try.cont
%tmp21 = load i32, i32* %i, align 4
%inc5 = add nsw i32 %tmp21, 1
store i32 %inc5, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%tmp22 = load i32, i32* %NumExceptions, align 4
%arraydecay = getelementptr inbounds [10 x i32], [10 x i32]* %ExceptionVal, i32 0, i32 0
call void @"\01?dump@@YAXPEAHHAEAUSomeData@@@Z"(i32* %arraydecay, i32 %tmp22, %struct.SomeData* dereferenceable(8) %Data)
ret void
; CHECK-NOT: eh.resume:
eh.resume: ; preds = %catch.dispatch
%exn6 = load i8*, i8** %exn.slot
%sel7 = load i32, i32* %ehselector.slot
%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn6, 0
%lpad.val8 = insertvalue { i8*, i32 } %lpad.val, i32 %sel7, 1
resume { i8*, i32 } %lpad.val8
; CHECK: }
}
; The following catch handler should be outlined.
; CHECK-LABEL: define internal i8* @"\01?test@@YAXXZ.catch"(i8*, i8*)
; CHECK: entry:
; CHECK: [[RECOVER_E:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 0)
; CHECK: [[E_PTR1:\%.+]] = bitcast i8* [[RECOVER_E]] to i32*
; CHECK: [[RECOVER_NUMEXCEPTIONS:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 1)
; CHECK: [[NUMEXCEPTIONS_PTR1:\%.+]] = bitcast i8* [[RECOVER_NUMEXCEPTIONS]] to i32*
; CHECK: [[RECOVER_EXCEPTIONVAL:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 2)
; CHECK: [[EXCEPTIONVAL_PTR1:\%.+]] = bitcast i8* [[RECOVER_EXCEPTIONVAL]] to [10 x i32]*
; CHECK: [[RECOVER_I:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 3)
; CHECK: [[I_PTR1:\%.+]] = bitcast i8* [[RECOVER_I]] to i32*
; CHECK: [[RECOVER_DATA:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 4)
; CHECK: [[DATA_PTR1:\%.+]] = bitcast i8* [[RECOVER_DATA]] to %struct.SomeData*
; CHECK: [[TMP:\%.+]] = load i32, i32* [[E_PTR1]], align 4
; CHECK: [[TMP1:\%.+]] = load i32, i32* [[NUMEXCEPTIONS_PTR]], align 4
; CHECK: [[IDXPROM:\%.+]] = sext i32 [[TMP1]] to i64
; CHECK: [[ARRAYIDX:\%.+]] = getelementptr inbounds [10 x i32], [10 x i32]* [[EXCEPTIONVAL_PTR1]], i32 0, i64 [[IDXPROM]]
; CHECK: store i32 [[TMP]], i32* [[ARRAYIDX]], align 4
; CHECK: [[TMP2:\%.+]] = load i32, i32* [[NUMEXCEPTIONS_PTR1]], align 4
; CHECK: [[INC:\%.+]] = add nsw i32 [[TMP2]], 1
; CHECK: store i32 [[INC]], i32* [[NUMEXCEPTIONS_PTR]], align 4
; CHECK: [[TMP3:\%.+]] = load i32, i32* [[E_PTR1]], align 4
; CHECK: [[TMP4:\%.+]] = load i32, i32* [[I_PTR1]], align 4
; CHECK: [[CMP:\%.+]] = icmp eq i32 [[TMP3]], [[TMP4]]
; CHECK: br i1 [[CMP]], label %if.then, label %if.else
;
; CHECK: if.then: ; preds = %entry
; CHECK: [[TMP5:\%.+]] = load i32, i32* [[E_PTR1]], align 4
; CHECK: [[B_PTR:\%.+]] = getelementptr inbounds %struct.SomeData, %struct.SomeData* [[DATA_PTR1]], i32 0, i32 1
; CHECK: [[TMP6:\%.+]] = load i32, i32* [[B_PTR]], align 4
; CHECK: %add2 = add nsw i32 [[TMP6]], [[TMP5]]
; CHECK: store i32 [[ADD:\%.+]], i32* [[B_PTR]], align 4
; CHECK: br label %if.end
;
; CHECK: if.else: ; preds = %entry
; CHECK: [[TMP7:\%.+]] = load i32, i32* %e, align 4
; CHECK: [[A3:\%.+]] = getelementptr inbounds %struct.SomeData, %struct.SomeData* %Data, i32 0, i32 0
; CHECK: [[TMP8:\%.+]] = load i32, i32* %a3, align 4
; CHECK: [[ADD1:\%.+]] = add nsw i32 [[TMP8]], [[TMP7]]
; CHECK: store i32 [[ADD1]], i32* [[A3]], align 4
; CHECK: br label %if.end
;
; CHECK: if.end: ; preds = %if.else, %if.then
; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %try.cont)
; CHECK: }
; Function Attrs: nounwind
declare void @llvm.memset(i8* nocapture, i8, i64, i32, i1) #1
declare void @"\01?may_throw@@YAXXZ"() #2
declare i32 @__CxxFrameHandler3(...)
; Function Attrs: nounwind readnone
declare i32 @llvm.eh.typeid.for(i8*) #3
declare void @llvm.eh.begincatch(i8*, i8*)
declare void @llvm.eh.endcatch()
declare void @"\01?does_not_throw@@YAXH@Z"(i32) #2
declare void @"\01?dump@@YAXPEAHHAEAUSomeData@@@Z"(i32*, i32, %struct.SomeData* dereferenceable(8)) #2
attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind }
attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind readnone }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"PIC Level", i32 2}
!1 = !{!"clang version 3.7.0 (trunk 228868)"}
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