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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
127 lines
4.4 KiB
LLVM
127 lines
4.4 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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; may_throw();
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; } catch (int i) {
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; handle_int(i);
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; }
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; }
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;
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; Parts of the IR have been hand-edited to simplify the test case.
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; The full IR will be restored when Windows C++ EH support is complete.
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;ModuleID = 'cppeh-catch-scalar.cpp'
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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@_ZTIi = external constant i8*
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; The function entry will be rewritten like this.
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; CHECK: define void @_Z4testv()
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; CHECK: entry:
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; CHECK: [[I_PTR:\%.+]] = alloca i32, align 4
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; CHECK: call void (...) @llvm.localescape(i32* [[I_PTR]])
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; CHECK: invoke void @_Z9may_throwv()
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; CHECK: to label %invoke.cont unwind label %[[LPAD_LABEL:lpad[0-9]*]]
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; Function Attrs: uwtable
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define void @_Z4testv() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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%exn.slot = alloca i8*
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%ehselector.slot = alloca i32
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%i = alloca i32, align 4
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invoke void @_Z9may_throwv()
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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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; CHECK: [[LPAD_LABEL]]:{{[ ]+}}; preds = %entry
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; CHECK: landingpad { i8*, i32 }
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; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
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; CHECK-NEXT: [[RECOVER:\%.+]] = call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (i8** @_ZTIi to i8*), i32 0, i8* (i8*, i8*)* @_Z4testv.catch)
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; CHECK-NEXT: indirectbr i8* [[RECOVER]], [label %try.cont]
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lpad: ; preds = %entry
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%tmp = landingpad { i8*, i32 }
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catch i8* bitcast (i8** @_ZTIi to i8*)
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%tmp1 = extractvalue { i8*, i32 } %tmp, 0
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store i8* %tmp1, i8** %exn.slot
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%tmp2 = extractvalue { i8*, i32 } %tmp, 1
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store i32 %tmp2, i32* %ehselector.slot
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br label %catch.dispatch
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; CHECK-NOT: catch-dispatch:
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catch.dispatch: ; preds = %lpad
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%sel = load i32, i32* %ehselector.slot
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%tmp3 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #3
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%matches = icmp eq i32 %sel, %tmp3
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br i1 %matches, label %catch, label %eh.resume
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; CHECK-NOT: catch:
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catch: ; preds = %catch.dispatch
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%exn11 = load i8*, i8** %exn.slot
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%i.i8 = bitcast i32* %i to i8*
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call void @llvm.eh.begincatch(i8* %exn11, i8* %i.i8) #3
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%tmp7 = load i32, i32* %i, align 4
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call void @_Z10handle_inti(i32 %tmp7)
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br label %invoke.cont2
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; CHECK-NOT: invoke.cont2:
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invoke.cont2: ; preds = %catch
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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 = %invoke.cont2, %invoke.cont
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ret void
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; CHECK-NOT: eh.resume:
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eh.resume: ; preds = %catch.dispatch
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%exn3 = load i8*, i8** %exn.slot
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%sel4 = load i32, i32* %ehselector.slot
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%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn3, 0
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%lpad.val5 = insertvalue { i8*, i32 } %lpad.val, i32 %sel4, 1
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resume { i8*, i32 } %lpad.val5
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; CHECK: }
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}
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; CHECK: define internal i8* @_Z4testv.catch(i8*, i8*)
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; CHECK: entry:
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; CHECK: [[RECOVER_I:\%.+]] = call i8* @llvm.localrecover(i8* bitcast (void ()* @_Z4testv to i8*), i8* %1, i32 0)
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; CHECK: [[I_PTR1:\%.+]] = bitcast i8* [[RECOVER_I]] to i32*
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; CHECK: [[TMP:\%.+]] = load i32, i32* [[I_PTR1]], align 4
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; CHECK: call void @_Z10handle_inti(i32 [[TMP]])
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; CHECK: ret i8* blockaddress(@_Z4testv, %try.cont)
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; CHECK: }
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declare void @_Z9may_throwv() #1
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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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declare void @llvm.eh.begincatch(i8*, i8*)
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declare void @llvm.eh.endcatch()
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declare void @_Z10handle_inti(i32) #1
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attributes #0 = { uwtable "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 = { "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 #2 = { nounwind readnone }
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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 227474) (llvm/trunk 227508)"}
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