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llvm-mirror/test/CodeGen/WinEH/cppeh-frame-vars.ll
Reid Kleckner 45072b933e Rename llvm.frameescape and llvm.framerecover to localescape and localrecover 
Summary:
Initially, these intrinsics seemed like part of a family of "frame"
related intrinsics, but now I think that's more confusing than helpful.
Initially, the LangRef specified that this would create a new kind of
allocation that would be allocated at a fixed offset from the frame
pointer (EBP/RBP). We ended up dropping that design, and leaving the
stack frame layout alone.

These intrinsics are really about sharing local stack allocations, not
frame pointers. I intend to go further and add an `llvm.localaddress()`
intrinsic that returns whatever register (EBP, ESI, ESP, RBX) is being
used to address locals, which should not be confused with the frame
pointer.

Naming suggestions at this point are welcome, I'm happy to re-run sed.

Reviewers: majnemer, nicholas

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D11011

llvm-svn: 241633
2015-07-07 22:25:32 +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.localescape(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 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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 }
; 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 }
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.localrecover(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.localrecover(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.localrecover(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.localrecover(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.localrecover(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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