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https://github.com/RPCS3/llvm-mirror.git
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45072b933e
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
165 lines
6.6 KiB
LLVM
165 lines
6.6 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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; Verify that we get the right frame escape label when the catch comes after the
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; parent function.
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; This test case is equivalent to:
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; int main() {
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; try {
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; throw 42;
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; } catch (int e) {
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; printf("e: %d\n", e);
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; }
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; }
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target datalayout = "e-m:w-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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%eh.CatchableType = type { i32, i32, i32, i32, i32, i32, i32 }
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%eh.CatchableTypeArray.1 = type { i32, [1 x i32] }
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%eh.ThrowInfo = type { i32, i32, i32, i32 }
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%eh.CatchHandlerType = type { i32, i8* }
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$"\01??_R0H@8" = comdat any
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$"_CT??_R0H@84" = comdat any
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$_CTA1H = comdat any
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$_TI1H = comdat any
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$"\01??_C@_06PNOAJMHG@e?3?5?$CFd?6?$AA@" = comdat any
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@"\01??_7type_info@@6B@" = external constant i8*
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@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
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@__ImageBase = external constant i8
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@"_CT??_R0H@84" = linkonce_odr unnamed_addr constant %eh.CatchableType { i32 1, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 0, i32 -1, i32 0, i32 4, i32 0 }, section ".xdata", comdat
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@_CTA1H = linkonce_odr unnamed_addr constant %eh.CatchableTypeArray.1 { i32 1, [1 x i32] [i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableType* @"_CT??_R0H@84" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32)] }, section ".xdata", comdat
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@_TI1H = linkonce_odr unnamed_addr constant %eh.ThrowInfo { i32 0, i32 0, i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableTypeArray.1* @_CTA1H to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, section ".xdata", comdat
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@llvm.eh.handlertype.H.0 = private unnamed_addr constant %eh.CatchHandlerType { i32 0, i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*) }, section "llvm.metadata"
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@"\01??_C@_06PNOAJMHG@e?3?5?$CFd?6?$AA@" = linkonce_odr unnamed_addr constant [7 x i8] c"e: %d\0A\00", comdat, align 1
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declare void @_CxxThrowException(i8*, %eh.ThrowInfo*)
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; Function Attrs: uwtable
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define i32 @main() #1 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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%tmp.i = alloca i32, align 4
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%e = alloca i32, align 4
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%0 = bitcast i32* %tmp.i to i8*
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store i32 42, i32* %tmp.i, align 4, !tbaa !2
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call void (...) @llvm.localescape(i32* %e)
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invoke void @_CxxThrowException(i8* %0, %eh.ThrowInfo* @_TI1H) #6
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to label %.noexc unwind label %lpad1
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.noexc: ; preds = %entry
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unreachable
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lpad1: ; preds = %entry
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%1 = landingpad { i8*, i32 }
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catch %eh.CatchHandlerType* @llvm.eh.handlertype.H.0
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%recover = call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (%eh.CatchHandlerType* @llvm.eh.handlertype.H.0 to i8*), i32 0, i8* (i8*, i8*)* @main.catch)
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indirectbr i8* %recover, [label %try.cont.split]
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try.cont.split: ; preds = %lpad1
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ret i32 0
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}
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; CHECK-LABEL: main:
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; CHECK: .seh_handlerdata
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; CHECK: .long ($cppxdata$main)@IMGREL
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declare i32 @__CxxFrameHandler3(...)
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; Function Attrs: nounwind readnone
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declare i32 @llvm.eh.typeid.for(i8*) #2
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; Function Attrs: nounwind
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declare void @llvm.eh.begincatch(i8* nocapture, i8* nocapture) #3
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; Function Attrs: nounwind
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declare i32 @printf(i8* nocapture readonly, ...) #4
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; Function Attrs: nounwind
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declare void @llvm.eh.endcatch() #3
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; Function Attrs: nounwind
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declare void @llvm.lifetime.start(i64, i8* nocapture) #3
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; Function Attrs: nounwind
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declare i8* @llvm.eh.actions(...) #3
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define internal i8* @main.catch(i8*, i8*) #5 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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%e.i8 = call i8* @llvm.localrecover(i8* bitcast (i32 ()* @main to i8*), i8* %1, i32 0)
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%e = bitcast i8* %e.i8 to i32*
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%2 = bitcast i32* %e to i8*
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%3 = load i32, i32* %e, align 4, !tbaa !2
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%call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @"\01??_C@_06PNOAJMHG@e?3?5?$CFd?6?$AA@", i64 0, i64 0), i32 %3)
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invoke void @llvm.donothing()
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to label %entry.split unwind label %stub
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entry.split: ; preds = %entry
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ret i8* blockaddress(@main, %try.cont.split)
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stub: ; preds = %entry
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%4 = landingpad { i8*, i32 }
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cleanup
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%recover = call i8* (...) @llvm.eh.actions()
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unreachable
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}
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; CHECK-LABEL: main.catch:
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; CHECK: .seh_handlerdata
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; CHECK: .long ($cppxdata$main)@IMGREL
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; CHECK-NEXT: $cppxdata$main:
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; CHECK-NEXT: .long 429065506
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long ($stateUnwindMap$main)@IMGREL
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long ($tryMap$main)@IMGREL
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; CHECK-NEXT: .long 3
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; CHECK-NEXT: .long ($ip2state$main)@IMGREL
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; CHECK-NEXT: .long 40
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 1
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; Make sure we get the right frame escape label.
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; CHECK: $handlerMap$0$main:
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long "??_R0H@8"@IMGREL
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; CHECK-NEXT: .long .Lmain$frame_escape_0
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; CHECK-NEXT: .long main.catch@IMGREL
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; CHECK-NEXT: .long .Lmain.catch$parent_frame_offset
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; Function Attrs: nounwind readnone
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declare void @llvm.donothing() #2
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; Function Attrs: nounwind
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declare void @llvm.localescape(...) #3
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; Function Attrs: nounwind readnone
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declare i8* @llvm.localrecover(i8*, i8*, i32) #2
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attributes #0 = { noreturn 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" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { 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" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" "wineh-parent"="main" }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind }
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attributes #4 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #5 = { "wineh-parent"="main" }
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attributes #6 = { noreturn }
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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 "}
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!2 = !{!3, !3, i64 0}
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!3 = !{!"int", !4, i64 0}
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!4 = !{!"omnipotent char", !5, i64 0}
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!5 = !{!"Simple C/C++ TBAA"}
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