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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
84 lines
3.1 KiB
LLVM
84 lines
3.1 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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; Test case based on this code:
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; extern "C" unsigned long _exception_code();
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; extern "C" int filt(unsigned long);
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; extern "C" void g();
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; extern "C" void do_except() {
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; __try {
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; g();
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; } __except(filt(_exception_code())) {
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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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; Function Attrs: uwtable
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define void @do_except() #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
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entry:
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call void (...) @llvm.localescape()
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invoke void @g() #5
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to label %__try.cont unwind label %lpad1
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lpad1: ; preds = %entry
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%ehvals = landingpad { i8*, i32 }
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catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@do_except@@" to i8*)
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%recover = call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@do_except@@" to i8*), i32 -1, i8* blockaddress(@do_except, %__try.cont))
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indirectbr i8* %recover, [label %__try.cont]
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__try.cont: ; preds = %lpad1, %entry
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ret void
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}
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; CHECK-LABEL: do_except:
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; CHECK: .seh_handler __C_specific_handler
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; CHECK-NOT: jmpq *
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; CHECK: .seh_handlerdata
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long .Ltmp{{.*}}
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; CHECK-NEXT: .long .Ltmp{{.*}}
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; CHECK-NEXT: .long "?filt$0@0@do_except@@"@IMGREL
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; CHECK-NEXT: .long .Ltmp{{.*}}@IMGREL
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; Function Attrs: noinline nounwind
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define internal i32 @"\01?filt$0@0@do_except@@"(i8* nocapture readonly %exception_pointers, i8* nocapture readnone %frame_pointer) #1 {
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entry:
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%0 = bitcast i8* %exception_pointers to i32**
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%1 = load i32*, i32** %0, align 8
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%2 = load i32, i32* %1, align 4
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%call = tail call i32 @filt(i32 %2) #4
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ret i32 %call
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}
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declare i32 @filt(i32) #2
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declare void @g() #2
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declare i32 @__C_specific_handler(...)
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; Function Attrs: nounwind readnone
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declare i32 @llvm.eh.typeid.for(i8*) #3
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; Function Attrs: nounwind
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declare i8* @llvm.eh.actions(...) #4
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; Function Attrs: nounwind
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declare void @llvm.localescape(...) #4
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; Function Attrs: nounwind readnone
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declare i8* @llvm.localrecover(i8*, i8*, i32) #3
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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" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" "wineh-parent"="do_except" }
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attributes #1 = { noinline 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 #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" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #3 = { nounwind readnone }
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attributes #4 = { nounwind }
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attributes #5 = { noinline }
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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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