mirror of
https://github.com/c64scene-ar/llvm-6502.git
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9f7c861416
Turns out it's pretty straightforward and simplifies the implementation. Reviewers: andrew.w.kaylor Differential Revision: http://reviews.llvm.org/D8051 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231386 91177308-0d34-0410-b5e6-96231b3b80d8
265 lines
12 KiB
LLVM
265 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"() #0 {
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; CHECK: entry:
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; CHECK: %NumExceptions.020.reg2mem = alloca i32
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; CHECK: %i.019.reg2mem = alloca i32
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; CHECK: %e = alloca i32, align 4
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; CHECK: %ExceptionVal = alloca [10 x i32], align 16
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; CHECK: %Data = alloca i64, align 8
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; CHECK: %tmpcast = bitcast i64* %Data to %struct.SomeData*
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; CHECK: %0 = bitcast [10 x i32]* %ExceptionVal to i8*
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; CHECK: call void @llvm.lifetime.start(i64 40, i8* %0) #1
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; CHECK: store i64 0, i64* %Data, align 8
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; CHECK: %a.reg2mem = alloca i32*
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; CHECK: %a = bitcast i64* %Data to i32*
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; CHECK: store i32* %a, i32** %a.reg2mem
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; CHECK: %b.reg2mem = alloca i32*
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; CHECK: %b = getelementptr inbounds %struct.SomeData, %struct.SomeData* %tmpcast, i64 0, i32 1
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; CHECK: store i32* %b, i32** %b.reg2mem
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; CHECK: store i32 0, i32* %NumExceptions.020.reg2mem
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; CHECK: store i32 0, i32* %i.019.reg2mem
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; CHECK: call void (...)* @llvm.frameescape(i32* %e, i32* %NumExceptions.020.reg2mem, [10 x i32]* %ExceptionVal, i32* %i.019.reg2mem, i32** %a.reg2mem, i32** %b.reg2mem)
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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: %NumExceptions.020 = phi i32 [ 0, %entry ], [ %NumExceptions.1, %try.cont ]
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; CHECK-NOT: %i.019 = phi i32 [ 0, %entry ], [ %inc5, %try.cont ]
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; CHECK: %i.019.reload = load i32, i32* %i.019.reg2mem
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; CHECK: %NumExceptions.020.reload = load i32, i32* %NumExceptions.020.reg2mem
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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-NOT: %1 = load i32, i32* %a, align 8, !tbaa !2
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; CHECK-NOT: %add = add nsw i32 %1, %i.019
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; CHECK-NOT: store i32 %add, i32* %a, align 8, !tbaa !2
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; CHECK: %a.reload3 = load volatile i32*, i32** %a.reg2mem
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; CHECK: %1 = load i32, i32* %a.reload3, align 8, !tbaa !2
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; CHECK: %add = add nsw i32 %1, %i.019.reload
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; CHECK: %a.reload2 = load volatile i32*, i32** %a.reg2mem
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; CHECK: store i32 %add, i32* %a.reload2, align 8, !tbaa !2
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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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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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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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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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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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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 = %if.end, %invoke.cont
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; CHECK-NOT: %NumExceptions.1 = phi i32 [ %NumExceptions.020, %invoke.cont ], [ %inc, %if.end ]
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; CHECK: %NumExceptions.1 = phi i32 [ %NumExceptions.020.reload, %invoke.cont ], [ %inc, %if.end ]
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; CHECK: tail call void @"\01?does_not_throw@@YAXH@Z"(i32 %NumExceptions.1)
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; CHECK-NOT: %inc5 = add nuw nsw i32 %i.019, 1
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; CHECK: %inc5 = add nuw nsw i32 %i.019.reload, 1
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; CHECK: %cmp = icmp slt i32 %inc5, 10
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; CHECK: store i32 %NumExceptions.1, i32* %NumExceptions.020.reg2mem
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; CHECK: store i32 %inc5, i32* %i.019.reg2mem
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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: %e.i84 = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 0)
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; CHECK: %e = bitcast i8* %e.i84 to i32*
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; CHECK: %eh.temp.alloca.i8 = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 1)
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; CHECK: %eh.temp.alloca = bitcast i8* %eh.temp.alloca.i8 to i32*
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; CHECK: %NumExceptions.020.reload = load i32, i32* %eh.temp.alloca
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; CHECK: %ExceptionVal.i8 = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 2)
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; CHECK: %ExceptionVal = bitcast i8* %ExceptionVal.i8 to [10 x i32]*
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; CHECK: %eh.temp.alloca1.i8 = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 3)
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; CHECK: %eh.temp.alloca1 = bitcast i8* %eh.temp.alloca1.i8 to i32*
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; CHECK: %i.019.reload = load i32, i32* %eh.temp.alloca1
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; CHECK: %eh.temp.alloca2.i8 = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 4)
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; CHECK: %eh.temp.alloca2 = bitcast i8* %eh.temp.alloca2.i8 to i32**
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; CHECK: %a.reload = load i32*, i32** %eh.temp.alloca2
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; CHECK: %eh.temp.alloca3.i8 = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 5)
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; CHECK: %eh.temp.alloca3 = bitcast i8* %eh.temp.alloca3.i8 to i32**
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; CHECK: %b.reload = load i32*, i32** %eh.temp.alloca3
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; CHECK: %e.i8 = bitcast i32* %e to i8*
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; CHECK: %tmp8 = load i32, i32* %e, align 4, !tbaa !7
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; CHECK: %idxprom = sext i32 %NumExceptions.020.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 %tmp8, i32* %arrayidx, align 4, !tbaa !7
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; CHECK: %inc = add nsw i32 %NumExceptions.020.reload, 1
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; CHECK: %cmp1 = icmp eq i32 %tmp8, %i.019.reload
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; CHECK: br i1 %cmp1, label %if.then, label %if.else
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;
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; CHECK: if.then: ; preds = %entry
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; CHECK: %tmp9 = load i32, i32* %b.reload, align 4, !tbaa !8
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; CHECK: %add2 = add nsw i32 %tmp9, %i.019.reload
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; CHECK: store i32 %add2, i32* %b.reload, align 4, !tbaa !8
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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: %tmp10 = load i32, i32* %a.reload, align 8, !tbaa !2
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; CHECK: %add4 = add nsw i32 %tmp10, %tmp8
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; CHECK: store i32 %add4, i32* %a.reload, align 8, !tbaa !2
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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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