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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
107 lines
3.9 KiB
LLVM
107 lines
3.9 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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; void test()
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; {
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; try {
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; Obj o;
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; may_throw();
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; } catch (...) {
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; }
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; }
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;
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; The purpose of this test is to verify that we create separate catch and
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; cleanup handlers. When compiling for the C++ 11 standard, this isn't
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; strictly necessary, since calling the destructor from the catch handler
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; would be logically equivalent to calling it from a cleanup handler.
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; However, if the -std=c++98 option is used, an exception in the cleanup
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; code should terminate the process (the MSVCRT runtime will do that) but
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; if the destructor is called from the catch handler, it wouldn't terminate
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; the process
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; ModuleID = 'cppeh-mixed-catch-and-cleanup.cpp'
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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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%class.Obj = type { i8 }
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; This just verifies that the function was processed by WinEHPrepare.
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;
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; CHECK-LABEL: define void @"\01?test@@YAXXZ"()
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; CHECK: entry:
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; CHECK: call void (...) @llvm.localescape
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; CHECK: }
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; Function Attrs: nounwind uwtable
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define void @"\01?test@@YAXXZ"() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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%o = alloca %class.Obj, align 1
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%exn.slot = alloca i8*
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%ehselector.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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call void @"\01??1Obj@@QEAA@XZ"(%class.Obj* %o) #3
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br label %try.cont
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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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store i8* %1, i8** %exn.slot
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%2 = extractvalue { i8*, i32 } %0, 1
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store i32 %2, i32* %ehselector.slot
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call void @"\01??1Obj@@QEAA@XZ"(%class.Obj* %o) #3
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%exn = load i8*, i8** %exn.slot
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call void @llvm.eh.begincatch(i8* %exn, i8* null) #3
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call void @llvm.eh.endcatch() #3
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br label %try.cont
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try.cont: ; preds = %catch, %invoke.cont
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ret void
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}
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; Verify that a cleanup handler was created and that it calls ~Obj().
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; CHECK-LABEL: define internal void @"\01?test@@YAXXZ.cleanup"(i8*, i8*)
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; CHECK: entry:
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; CHECK: @llvm.localrecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 0)
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; CHECK: call void @"\01??1Obj@@QEAA@XZ"
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; CHECK: ret void
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; CHECK: }
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; Verify that a catch handler was created and that it does not call ~Obj().
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; CHECK-LABEL: define internal i8* @"\01?test@@YAXXZ.catch"(i8*, i8*)
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; CHECK: entry:
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; CHECK-NOT: call void @"\01??1Obj@@QEAA@XZ"
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; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %try.cont)
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; CHECK: }
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declare void @"\01?may_throw@@YAXXZ"() #1
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declare i32 @__CxxFrameHandler3(...)
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; Function Attrs: nounwind
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declare void @"\01??1Obj@@QEAA@XZ"(%class.Obj*) #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 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 = { "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 #2 = { 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 #3 = { nounwind }
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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 235779) (llvm/trunk 235769)"}
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