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Add a testcase to make sure we generate the proper compact unwind section for a function that cannot produce a compact unwind encoding.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179887 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2013-04-19 21:07:11 +00:00
parent d717e202a2
commit bb418038e1
1 changed files with 60 additions and 0 deletions
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test/CodeGen/X86/no-compact-unwind.ll Normal file
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; RUN: llc < %s -mtriple x86_64-apple-macosx10.8.0 -disable-cfi | FileCheck %s
%"struct.dyld::MappedRanges" = type { [400 x %struct.anon], %"struct.dyld::MappedRanges"* }
%struct.anon = type { %class.ImageLoader*, i64, i64 }
%class.ImageLoader = type { i32 (...)**, i8*, i8*, i32, i64, i64, i32, i32, %"struct.ImageLoader::recursive_lock"*, i16, i16, [4 x i8] }
%"struct.ImageLoader::recursive_lock" = type { i32, i32 }
@_ZN4dyldL18sMappedRangesStartE = external hidden global %"struct.dyld::MappedRanges", align 8
declare void @OSMemoryBarrier() optsize
; This compact unwind encoding indicates that we could not generate correct
; compact unwind encodings for this function. This then defaults to using the
; DWARF EH frame.
;
; CHECK: .section __LD,__compact_unwind,regular,debug
; CHECK: .quad __ZN4dyld19removedMappedRangesEP11ImageLoader
; CHECK: .long 67108864 ## Compact Unwind Encoding: 0x4000000
; CHECK: .quad 0 ## Personality Function
; CHECK: .quad 0 ## LSDA
;
define void @_ZN4dyld19removedMappedRangesEP11ImageLoader(%class.ImageLoader* %image) optsize ssp uwtable {
entry:
br label %for.cond1.preheader
for.cond1.preheader: ; preds = %for.inc10, %entry
%p.019 = phi %"struct.dyld::MappedRanges"* [ @_ZN4dyldL18sMappedRangesStartE, %entry ], [ %1, %for.inc10 ]
br label %for.body3
for.body3: ; preds = %for.inc, %for.cond1.preheader
%indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.inc ]
%image4 = getelementptr inbounds %"struct.dyld::MappedRanges"* %p.019, i64 0, i32 0, i64 %indvars.iv, i32 0
%0 = load %class.ImageLoader** %image4, align 8, !tbaa !0
%cmp5 = icmp eq %class.ImageLoader* %0, %image
br i1 %cmp5, label %if.then, label %for.inc
if.then: ; preds = %for.body3
tail call void @OSMemoryBarrier() optsize
store %class.ImageLoader* null, %class.ImageLoader** %image4, align 8, !tbaa !0
br label %for.inc
for.inc: ; preds = %if.then, %for.body3
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 400
br i1 %exitcond, label %for.inc10, label %for.body3
for.inc10: ; preds = %for.inc
%next = getelementptr inbounds %"struct.dyld::MappedRanges"* %p.019, i64 0, i32 1
%1 = load %"struct.dyld::MappedRanges"** %next, align 8, !tbaa !0
%cmp = icmp eq %"struct.dyld::MappedRanges"* %1, null
br i1 %cmp, label %for.end11, label %for.cond1.preheader
for.end11: ; preds = %for.inc10
ret void
}
!0 = metadata !{metadata !"any pointer", metadata !1}
!1 = metadata !{metadata !"omnipotent char", metadata !2}
!2 = metadata !{metadata !"Simple C/C++ TBAA"}