derek.holloway
7502bf64a4
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62 lines
2.3 KiB
LLVM
62 lines
2.3 KiB
LLVM
; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=static -simplifycfg-require-and-preserve-domtree=1 -o - %s | FileCheck %s
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; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=pic -simplifycfg-require-and-preserve-domtree=1 -o - %s | FileCheck %s
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; RUN: llc -mtriple=aarch64_be-none-linux-gnu -relocation-model=pic -simplifycfg-require-and-preserve-domtree=1 -o - %s | FileCheck %s
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; Make sure exception-handling PIC code can be linked correctly. An alternative
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; to the sequence described below would have .gcc_except_table itself writable
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; and not use the indirection, but this isn't what LLVM does right now.
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; There should be a read-only .gcc_except_table section...
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; CHECK: .section .gcc_except_table,"a"
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; ... referring indirectly to stubs for its typeinfo ...
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; CHECK: // @TType Encoding = indirect pcrel sdata8
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; ... one of which is "int"'s typeinfo
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; CHECK: [[TYPEINFO_LBL:.Ltmp[0-9]+]]: // TypeInfo 1
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; CHECK-NEXT: .xword .L_ZTIi.DW.stub-[[TYPEINFO_LBL]]
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; .. and which is properly defined (in a writable section for the dynamic loader) later.
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; CHECK: .data
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; CHECK: .L_ZTIi.DW.stub:
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; CHECK-NEXT: .xword _ZTIi
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@_ZTIi = external constant ptr
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define i32 @_Z3barv() personality ptr @__gxx_personality_v0 {
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entry:
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invoke void @_Z3foov()
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to label %return unwind label %lpad
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lpad: ; preds = %entry
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%0 = landingpad { ptr, i32 }
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catch ptr @_ZTIi
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%1 = extractvalue { ptr, i32 } %0, 1
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%2 = tail call i32 @llvm.eh.typeid.for(ptr @_ZTIi) nounwind
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%matches = icmp eq i32 %1, %2
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br i1 %matches, label %catch, label %eh.resume
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catch: ; preds = %lpad
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%3 = extractvalue { ptr, i32 } %0, 0
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%4 = tail call ptr @__cxa_begin_catch(ptr %3) nounwind
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%exn.scalar = load i32, ptr %4, align 4
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tail call void @__cxa_end_catch() nounwind
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br label %return
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return: ; preds = %entry, %catch
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%retval.0 = phi i32 [ %exn.scalar, %catch ], [ 42, %entry ]
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ret i32 %retval.0
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eh.resume: ; preds = %lpad
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resume { ptr, i32 } %0
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}
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declare void @_Z3foov()
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declare i32 @__gxx_personality_v0(...)
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declare i32 @llvm.eh.typeid.for(ptr) nounwind readnone
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declare ptr @__cxa_begin_catch(ptr)
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declare void @__cxa_end_catch()
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