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
174 lines
7.3 KiB
LLVM
174 lines
7.3 KiB
LLVM
; RUN: opt -mtriple=i386-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
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; This test is built from the following code:
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; struct A {
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; A(int a);
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; A(const A &o);
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; ~A();
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; int a;
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; };
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;
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; void may_throw();
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;
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; int test(A a) {
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; try {
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; may_throw();
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; }
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; catch (int e) {
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; return a.a + e;
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; }
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; return 0;
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; }
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;
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; The test was built for a 32-bit Windows target and then the reference to
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; the inalloca instruction was manually sunk into the landingpad.
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; ModuleID = 'cppeh-inalloca.cpp'
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target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
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target triple = "i386-pc-windows-msvc"
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%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
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%struct.A = type { 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 i32 @"\01?test@@YAHUA@@@Z"(<{ %struct.A }>* inalloca) #0 {
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; CHECK: entry:
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; CHECK: %.tmp.reg2mem = alloca <{ %struct.A }>*
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; CHECK: %.tmp = select i1 true, <{ %struct.A }>* %0, <{ %struct.A }>* undef
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; CHECK: store <{ %struct.A }>* %.tmp, <{ %struct.A }>** %.tmp.reg2mem
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; CHECK: %retval = alloca i32, align 4
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; CHECK: %exn.slot = alloca i8*
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; CHECK: %ehselector.slot = alloca i32
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; CHECK: %e = alloca i32, align 4
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; CHECK: %cleanup.dest.slot = alloca i32
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; CHECK: call void (...)* @llvm.frameescape(i32* %e, <{ %struct.A }>** %.tmp.reg2mem, i32* %retval, i32* %cleanup.dest.slot)
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; CHECK: invoke void @"\01?may_throw@@YAXXZ"()
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; CHECK: to label %invoke.cont unwind label %lpad
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define i32 @"\01?test@@YAHUA@@@Z"(<{ %struct.A }>* inalloca) #0 {
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entry:
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%retval = alloca i32, align 4
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%exn.slot = alloca i8*
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%ehselector.slot = alloca i32
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%e = alloca i32, align 4
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%cleanup.dest.slot = alloca i32
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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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invoke.cont: ; preds = %entry
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br label %try.cont
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lpad: ; preds = %entry
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%1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
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cleanup
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catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
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%2 = extractvalue { i8*, i32 } %1, 0
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store i8* %2, i8** %exn.slot
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%3 = extractvalue { i8*, i32 } %1, 1
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store i32 %3, i32* %ehselector.slot
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br label %catch.dispatch
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catch.dispatch: ; preds = %lpad
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%sel = load i32, i32* %ehselector.slot
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%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)) #3
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%matches = icmp eq i32 %sel, %4
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br i1 %matches, label %catch, label %ehcleanup
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catch: ; preds = %catch.dispatch
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%exn = load i8*, i8** %exn.slot
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%e.i8 = bitcast i32* %e to i8*
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call void @llvm.eh.begincatch(i8* %exn, i8* %e.i8) #3
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%a = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %0, i32 0, i32 0
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%a1 = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 0
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%tmp8 = load i32, i32* %a1, align 4
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%tmp9 = load i32, i32* %e, align 4
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%add = add nsw i32 %tmp8, %tmp9
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store i32 %add, i32* %retval
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store i32 1, i32* %cleanup.dest.slot
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call void @llvm.eh.endcatch() #3
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br label %cleanup
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try.cont: ; preds = %invoke.cont
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store i32 0, i32* %retval
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store i32 1, i32* %cleanup.dest.slot
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br label %cleanup
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; The cleanup block should be re-written like this.
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; CHECK: cleanup: ; preds = %try.cont, %catch
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; CHECK-NOT: %a2 = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %0, i32 0, i32 0
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; CHECK: %.tmp.reload1 = load volatile <{ %struct.A }>*, <{ %struct.A }>** %.tmp.reg2mem
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; CHECK: %a2 = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %.tmp.reload1, i32 0, i32 0
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; CHECK: call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a2) #2
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; CHECK: %tmp10 = load i32, i32* %retval
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; CHECK: ret i32 %tmp10
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cleanup: ; preds = %try.cont, %catch
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%a2 = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %0, i32 0, i32 0
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call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a2) #3
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%tmp10 = load i32, i32* %retval
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ret i32 %tmp10
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ehcleanup: ; preds = %catch.dispatch
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%a3 = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %0, i32 0, i32 0
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call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a3) #3
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br label %eh.resume
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eh.resume: ; preds = %ehcleanup
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%exn2 = load i8*, i8** %exn.slot
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%sel3 = load i32, i32* %ehselector.slot
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%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn2, 0
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%lpad.val4 = insertvalue { i8*, i32 } %lpad.val, i32 %sel3, 1
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resume { i8*, i32 } %lpad.val4
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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@@YAHUA@@@Z.catch"(i8*, i8*) {
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; CHECK: entry:
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; CHECK: %e.i81 = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 0)
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; CHECK: %e = bitcast i8* %e.i81 to i32*
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; CHECK: %eh.temp.alloca.i8 = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 1)
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; CHECK: %eh.temp.alloca = bitcast i8* %eh.temp.alloca.i8 to <{ %struct.A }>**
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; CHECK: %.reload = load <{ %struct.A }>*, <{ %struct.A }>** %eh.temp.alloca
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; CHECK: %retval.i8 = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 2)
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; CHECK: %retval = bitcast i8* %retval.i8 to i32*
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; CHECK: %cleanup.dest.slot.i8 = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 3)
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; CHECK: %cleanup.dest.slot = bitcast i8* %cleanup.dest.slot.i8 to i32*
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; CHECK: %e.i8 = bitcast i32* %e to i8*
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; CHECK: %a = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %.reload, i32 0, i32 0
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; CHECK: %a1 = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 0
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; CHECK: %tmp8 = load i32, i32* %a1, align 4
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; CHECK: %tmp9 = load i32, i32* %e, align 4
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; CHECK: %add = add nsw i32 %tmp8, %tmp9
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; CHECK: store i32 %add, i32* %retval
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; CHECK: store i32 1, i32* %cleanup.dest.slot
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; CHECK: ret i8* blockaddress(@"\01?test@@YAHUA@@@Z", %cleanup)
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; CHECK: }
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declare void @"\01?may_throw@@YAXXZ"() #0
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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*) #1
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declare void @llvm.eh.begincatch(i8*, i8*)
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declare void @llvm.eh.endcatch()
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; Function Attrs: nounwind
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declare x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A*) #2
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attributes #0 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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 readnone }
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attributes #2 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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 }
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!llvm.ident = !{!0}
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!0 = !{!"clang version 3.7.0 (trunk 228868)"}
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