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b08b580e85
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;
}
llvm-svn: 233947
274 lines
12 KiB
LLVM
274 lines
12 KiB
LLVM
; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
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; This test is based on the following code:
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;
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; struct SomeData {
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; int a;
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; int b;
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; };
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;
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; void may_throw();
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; void does_not_throw(int i);
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; void dump(int *, int, SomeData&);
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;
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; void test() {
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; int NumExceptions = 0;
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; int ExceptionVal[10];
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; SomeData Data = { 0, 0 };
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;
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; for (int i = 0; i < 10; ++i) {
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; try {
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; may_throw();
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; Data.a += i;
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; }
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; catch (int e) {
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; ExceptionVal[NumExceptions] = e;
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; ++NumExceptions;
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; if (e == i)
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; Data.b += e;
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; else
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; Data.a += e;
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; }
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; does_not_throw(NumExceptions);
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; }
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; dump(ExceptionVal, NumExceptions, Data);
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; }
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;
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; Unlike the cppeh-frame-vars.ll test, this test was generated using -O2
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; optimization, which results in non-alloca values being used in the
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; catch handler.
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; ModuleID = 'cppeh-frame-vars.cpp'
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
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%struct.SomeData = type { i32, i32 }
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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??_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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; The function entry should be rewritten like this.
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; CHECK: define void @"\01?test@@YAXXZ"()
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; CHECK: entry:
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; CHECK: [[NUMEXCEPTIONS_REGMEM:\%.+]] = alloca i32
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; CHECK: [[I_REGMEM:\%.+]] = alloca i32
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; CHECK: [[E_PTR:\%.+]] = alloca i32, align 4
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; CHECK: [[EXCEPTIONVAL:\%.+]] = alloca [10 x i32], align 16
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; CHECK: [[DATA_PTR:\%.+]] = alloca i64, align 8
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; CHECK: [[TMPCAST:\%.+]] = bitcast i64* [[DATA_PTR]] to %struct.SomeData*
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; CHECK: [[TMP:\%.+]] = bitcast [10 x i32]* [[EXCEPTIONVAL]] to i8*
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; CHECK: call void @llvm.lifetime.start(i64 40, i8* [[TMP]])
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; CHECK: store i64 0, i64* [[DATA_PTR]], align 8
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; CHECK: [[A_REGMEM:\%.+]] = alloca i32*
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; CHECK: [[A_PTR:\%.+]] = bitcast i64* [[DATA_PTR]] to i32*
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; CHECK: store i32* [[A_PTR]], i32** [[A_REGMEM]]
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; CHECK: [[B_PTR:\%.+]] = getelementptr inbounds %struct.SomeData, %struct.SomeData* [[TMPCAST]], i64 0, i32 1
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; CHECK: [[B_REGMEM:\%.+]] = alloca i32*
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; CHECK: store i32* [[B_PTR]], i32** [[B_REGMEM]]
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; CHECK: store i32 0, i32* [[NUMEXCEPTIONS_REGMEM]]
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; CHECK: store i32 0, i32* [[I_REGMEM]]
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; CHECK: call void (...)* @llvm.frameescape(i32* %e, i32* %NumExceptions.020.reg2mem, [10 x i32]* [[EXCEPTIONVAL]], i32* [[I_REGMEM]], i32** [[A_REGMEM]], i32** [[B_REGMEM]])
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; CHECK: br label %for.body
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; Function Attrs: uwtable
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define void @"\01?test@@YAXXZ"() #0 {
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entry:
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%e = alloca i32, align 4
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%ExceptionVal = alloca [10 x i32], align 16
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%Data = alloca i64, align 8
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%tmpcast = bitcast i64* %Data to %struct.SomeData*
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%0 = bitcast [10 x i32]* %ExceptionVal to i8*
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call void @llvm.lifetime.start(i64 40, i8* %0) #1
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store i64 0, i64* %Data, align 8
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%a = bitcast i64* %Data to i32*
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%b = getelementptr inbounds %struct.SomeData, %struct.SomeData* %tmpcast, i64 0, i32 1
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br label %for.body
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; CHECK: for.body:
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; CHECK-NOT: phi i32 [ 0, %entry ], [ {{\%NumExceptions.*}}, %try.cont ]
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; CHECK-NOT: phi i32 [ 0, %entry ], [ {{\%inc.*}}, %try.cont ]
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; CHECK: [[I_RELOAD:\%.+]] = load i32, i32* [[I_REGMEM]]
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; CHECK: [[NUMEXCEPTIONS_RELOAD:\%.+]] = load i32, i32* [[NUMEXCEPTIONS_REGMEM]]
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for.body: ; preds = %entry, %try.cont
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%NumExceptions.020 = phi i32 [ 0, %entry ], [ %NumExceptions.1, %try.cont ]
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%i.019 = phi i32 [ 0, %entry ], [ %inc5, %try.cont ]
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invoke void @"\01?may_throw@@YAXXZ"()
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to label %invoke.cont unwind label %lpad
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; CHECK: invoke.cont: ; preds = %for.body
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; CHECK: [[A_RELOAD:\%.+]] = load volatile i32*, i32** [[A_REGMEM]]
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; CHECK: [[TMP1:\%.+]] = load i32, i32* [[A_RELOAD]], align 8
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; CHECK: [[ADD:\%.+]] = add nsw i32 [[TMP1]], [[I_RELOAD]]
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; CHECK: [[A_RELOAD1:\%.+]] = load volatile i32*, i32** [[A_REGMEM]]
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; CHECK: store i32 [[ADD]], i32* [[A_RELOAD1]], align 8
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; CHECK: br label %try.cont
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invoke.cont: ; preds = %for.body
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%1 = load i32, i32* %a, align 8, !tbaa !2
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%add = add nsw i32 %1, %i.019
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store i32 %add, i32* %a, align 8, !tbaa !2
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br label %try.cont
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; CHECK: [[LPAD_LABEL:lpad[0-9]*]]:{{[ ]+}}; preds = %for.body
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; CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
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; CHECK-NEXT: catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
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; 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")
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; CHECK-NEXT: indirectbr i8* [[RECOVER]], [label %try.cont]
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lpad: ; preds = %for.body
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%2 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
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catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
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%3 = extractvalue { i8*, i32 } %2, 1
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%4 = tail call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)) #1
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%matches = icmp eq i32 %3, %4
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br i1 %matches, label %catch, label %eh.resume
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; CHECK-NOT: catch:
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catch: ; preds = %lpad
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%5 = extractvalue { i8*, i32 } %2, 0
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%e.i8 = bitcast i32* %e to i8*
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call void @llvm.eh.begincatch(i8* %5, i8* %e.i8) #1
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%tmp8 = load i32, i32* %e, align 4, !tbaa !7
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%idxprom = sext i32 %NumExceptions.020 to i64
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%arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* %ExceptionVal, i64 0, i64 %idxprom
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store i32 %tmp8, i32* %arrayidx, align 4, !tbaa !7
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%inc = add nsw i32 %NumExceptions.020, 1
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%cmp1 = icmp eq i32 %tmp8, %i.019
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br i1 %cmp1, label %if.then, label %if.else
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; CHECK-NOT: if.then:
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if.then: ; preds = %catch
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%tmp9 = load i32, i32* %b, align 4, !tbaa !8
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%add2 = add nsw i32 %tmp9, %i.019
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store i32 %add2, i32* %b, align 4, !tbaa !8
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br label %if.end
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; CHECK-NOT: if.else:
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if.else: ; preds = %catch
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%tmp10 = load i32, i32* %a, align 8, !tbaa !2
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%add4 = add nsw i32 %tmp10, %tmp8
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store i32 %add4, i32* %a, align 8, !tbaa !2
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br label %if.end
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; CHECK-NOT: if.end:
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if.end: ; preds = %if.else, %if.then
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tail call void @llvm.eh.endcatch() #1
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br label %try.cont
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; CHECK: try.cont:{{[ ]+}}; preds = %[[LPAD_LABEL]], %invoke.cont
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; CHECK-NOT: phi i32
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; CHECK: tail call void @"\01?does_not_throw@@YAXH@Z"(i32 [[NUMEXCEPTIONS_RELOAD]])
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; CHECK: [[INC:\%.+]] = add nuw nsw i32 [[I_RELOAD]], 1
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; CHECK: [[CMP:\%.+]] = icmp slt i32 [[INC]], 10
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; CHECK: store i32 [[NUMEXCEPTIONS_RELOAD]], i32* [[NUMEXCEPTIONS_REGMEM]]
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; CHECK: store i32 [[INC]], i32* [[I_REGMEM]]
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; CHECK: br i1 [[CMP]], label %for.body, label %for.end
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try.cont: ; preds = %if.end, %invoke.cont
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%NumExceptions.1 = phi i32 [ %NumExceptions.020, %invoke.cont ], [ %inc, %if.end ]
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tail call void @"\01?does_not_throw@@YAXH@Z"(i32 %NumExceptions.1)
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%inc5 = add nuw nsw i32 %i.019, 1
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%cmp = icmp slt i32 %inc5, 10
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %try.cont
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%NumExceptions.1.lcssa = phi i32 [ %NumExceptions.1, %try.cont ]
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%arraydecay = getelementptr inbounds [10 x i32], [10 x i32]* %ExceptionVal, i64 0, i64 0
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call void @"\01?dump@@YAXPEAHHAEAUSomeData@@@Z"(i32* %arraydecay, i32 %NumExceptions.1.lcssa, %struct.SomeData* dereferenceable(8) %tmpcast)
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call void @llvm.lifetime.end(i64 40, i8* %0) #1
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ret void
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eh.resume: ; preds = %lpad
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%.lcssa = phi { i8*, i32 } [ %2, %lpad ]
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resume { i8*, i32 } %.lcssa
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}
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; The following catch handler should be outlined.
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; CHECK: define internal i8* @"\01?test@@YAXXZ.catch"(i8*, i8*)
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; CHECK: entry:
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; CHECK: [[RECOVER_E:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 0)
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; CHECK: [[E_PTR:\%.+]] = bitcast i8* [[RECOVER_E]] to i32*
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; CHECK: [[RECOVER_EH_TEMP:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 1)
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; CHECK: [[EH_TEMP:\%.+]] = bitcast i8* [[RECOVER_EH_TEMP]] to i32*
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; CHECK: [[NUMEXCEPTIONS_RELOAD:\%.+]] = load i32, i32* [[EH_TEMP]]
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; CHECK: [[RECOVER_EXCEPTIONVAL:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 2)
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; CHECK: [[EXCEPTIONVAL:\%.+]] = bitcast i8* [[RECOVER_EXCEPTIONVAL]] to [10 x i32]*
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; CHECK: [[RECOVER_EH_TEMP1:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 3)
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; CHECK: [[EH_TEMP1:\%.+]] = bitcast i8* [[RECOVER_EH_TEMP1]] to i32*
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; CHECK: [[I_RELOAD:\%.+]] = load i32, i32* [[EH_TEMP1]]
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; CHECK: [[RECOVER_EH_TEMP2:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 4)
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; CHECK: [[EH_TEMP2:\%.+]] = bitcast i8* [[RECOVER_EH_TEMP2]] to i32**
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; CHECK: [[A_RELOAD:\%.+]] = load i32*, i32** [[EH_TEMP2]]
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; CHECK: [[RECOVER_EH_TEMP3:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 5)
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; CHECK: [[EH_TEMP3:\%.+]] = bitcast i8* [[RECOVER_EH_TEMP3]] to i32**
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; CHECK: [[B_RELOAD:\%.+]] = load i32*, i32** [[EH_TEMP3]]
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; CHECK: [[E_I8PTR:\%.+]] = bitcast i32* [[E_PTR]] to i8*
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; CHECK: [[TMP:\%.+]] = load i32, i32* [[E_PTR]], align 4
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; CHECK: [[IDXPROM:\%.+]] = sext i32 [[NUMEXCEPTIONS_RELOAD]] to i64
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; CHECK: [[ARRAYIDX:\%.+]] = getelementptr inbounds [10 x i32], [10 x i32]* [[EXCEPTIONVAL]], i64 0, i64 [[IDXPROM]]
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; CHECK: store i32 [[TMP]], i32* [[ARRAYIDX]], align 4
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; CHECK: [[INC:\%.+]] = add nsw i32 [[NUMEXCEPTIONS_RELOAD]], 1
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; CHECK: [[CMP:\%.+]] = icmp eq i32 [[TMP]], [[I_RELOAD]]
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; CHECK: br i1 [[CMP]], label %if.then, label %if.else
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;
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; CHECK: if.then:{{[ ]+}}; preds = %entry
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; CHECK: [[TMP1:\%.+]] = load i32, i32* [[B_RELOAD]], align 4
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; CHECK: [[ADD:\%.+]] = add nsw i32 [[TMP1]], [[I_RELOAD]]
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; CHECK: store i32 [[ADD]], i32* [[B_RELOAD]], align 4
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; CHECK: br label %if.end
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;
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; CHECK: if.else:{{[ ]+}}; preds = %entry
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; CHECK: [[TMP2:\%.+]] = load i32, i32* [[A_RELOAD]], align 8
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; CHECK: [[ADD2:\%.+]] = add nsw i32 [[TMP2]], [[TMP]]
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; CHECK: store i32 [[ADD2]], i32* [[A_RELOAD]], align 8
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; CHECK: br label %if.end
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;
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; CHECK: if.end:{{[ ]+}}; preds = %if.else, %if.then
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; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %try.cont)
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; CHECK: }
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; Function Attrs: nounwind
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declare void @llvm.lifetime.start(i64, i8* nocapture) #1
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declare void @"\01?may_throw@@YAXXZ"() #2
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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*) #3
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declare void @llvm.eh.begincatch(i8*, i8*)
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declare void @llvm.eh.endcatch()
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declare void @"\01?does_not_throw@@YAXH@Z"(i32) #2
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declare void @"\01?dump@@YAXPEAHHAEAUSomeData@@@Z"(i32*, i32, %struct.SomeData* dereferenceable(8)) #2
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; Function Attrs: nounwind
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declare void @llvm.lifetime.end(i64, i8* nocapture) #1
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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" }
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attributes #1 = { nounwind }
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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" }
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attributes #3 = { nounwind readnone }
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!llvm.module.flags = !{!0}
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!llvm.ident = !{!1}
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!0 = !{i32 1, !"PIC Level", i32 2}
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!1 = !{!"clang version 3.7.0 (trunk 228868)"}
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!2 = !{!3, !4, i64 0}
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!3 = !{!"?AUSomeData@@", !4, i64 0, !4, i64 4}
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!4 = !{!"int", !5, i64 0}
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!5 = !{!"omnipotent char", !6, i64 0}
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!6 = !{!"Simple C/C++ TBAA"}
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!7 = !{!4, !4, i64 0}
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!8 = !{!3, !4, i64 4}
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