mirror of
https://github.com/c64scene-ar/llvm-6502.git
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8f32e5f0d6
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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241633 91177308-0d34-0410-b5e6-96231b3b80d8
111 lines
4.0 KiB
LLVM
111 lines
4.0 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 source, built with -O2
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;
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; void f() {
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; try {
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; g();
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; try {
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; throw;
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; } catch (int) {
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; }
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; } catch (...) {
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; }
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; }
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;
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; ModuleID = '<stdin>'
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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.CatchHandlerType = type { i32, i8* }
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%eh.ThrowInfo = type { i32, i32, 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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@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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; CHECK-LABEL: define void @"\01?f@@YAXXZ"()
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; CHECK: entry:
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; CHECK: call void (...) @llvm.localescape()
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; CHECK: invoke void @"\01?g@@YAXXZ"()
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; Function Attrs: nounwind
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define void @"\01?f@@YAXXZ"() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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invoke void @"\01?g@@YAXXZ"()
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to label %invoke.cont unwind label %lpad
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; CHECK-LABEL: invoke.cont:
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; CHECK: invoke void @_CxxThrowException(i8* null, %eh.ThrowInfo* null)
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; CHECK: to label %unreachable unwind label %[[LPAD1_LABEL:lpad[0-9]+]]
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invoke.cont: ; preds = %entry
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invoke void @_CxxThrowException(i8* null, %eh.ThrowInfo* null) #4
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to label %unreachable unwind label %lpad1
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lpad: ; preds = %entry
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%0 = landingpad { i8*, i32 }
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catch i8* null
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%1 = extractvalue { i8*, i32 } %0, 0
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br label %catch2
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; Note: Even though this landing pad has two catch clauses, it only has one action because both
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; handlers do the same thing.
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; CHECK: [[LPAD1_LABEL]]:
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; CHECK: landingpad { i8*, i32 }
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; CHECK-NEXT: catch %eh.CatchHandlerType* @llvm.eh.handlertype.H.0
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; CHECK-NEXT: catch i8* null
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; CHECK-NEXT: [[RECOVER:\%.+]] = call i8* (...) @llvm.eh.actions(i32 1, i8* null, i32 -1, i8* (i8*, i8*)* @"\01?f@@YAXXZ.catch")
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; CHECK-NEXT: indirectbr i8* [[RECOVER]], [label %try.cont4]
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lpad1: ; preds = %invoke.cont
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%2 = landingpad { i8*, i32 }
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catch %eh.CatchHandlerType* @llvm.eh.handlertype.H.0
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catch i8* null
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%3 = extractvalue { i8*, i32 } %2, 0
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br label %catch2
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catch2: ; preds = %lpad1, %lpad
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%exn.slot.0 = phi i8* [ %3, %lpad1 ], [ %1, %lpad ]
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tail call void @llvm.eh.begincatch(i8* %exn.slot.0, i8* null) #3
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tail call void @llvm.eh.endcatch() #3
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br label %try.cont4
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try.cont4: ; preds = %catch, %catch2
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ret void
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unreachable: ; preds = %invoke.cont
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unreachable
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; CHECK: }
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}
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declare void @"\01?g@@YAXXZ"() #1
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declare i32 @__CxxFrameHandler3(...)
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declare void @_CxxThrowException(i8*, %eh.ThrowInfo*)
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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 void @llvm.eh.endcatch() #3
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attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind }
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attributes #4 = { noreturn }
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!llvm.ident = !{!0}
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!0 = !{!"clang version 3.7.0 (trunk 235112) (llvm/trunk 235121)"}
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