2010-01-06-TailDuplicateLabels.ll
5.39 KB
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; RUN: llc -relocation-model=pic < %s | grep -E ': ?\s*$' | sort | uniq -d | count 0
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32"
target triple = "thumbv7-apple-darwin10"
; This function produces a duplicate LPC label unless special care is taken when duplicating a t2LDRpci_pic instruction.
%struct.PlatformMutex = type { i32, [40 x i8] }
%struct.SpinLock = type { %struct.PlatformMutex }
%"struct.WTF::TCMalloc_ThreadCache" = type { i32, %struct._opaque_pthread_t*, i8, [68 x %"struct.WTF::TCMalloc_ThreadCache_FreeList"], i32, i32, %"struct.WTF::TCMalloc_ThreadCache"*, %"struct.WTF::TCMalloc_ThreadCache"* }
%"struct.WTF::TCMalloc_ThreadCache_FreeList" = type { i8*, i16, i16 }
%struct.__darwin_pthread_handler_rec = type { void (i8*)*, i8*, %struct.__darwin_pthread_handler_rec* }
%struct._opaque_pthread_t = type { i32, %struct.__darwin_pthread_handler_rec*, [596 x i8] }
@_ZN3WTFL8heap_keyE = internal global i32 0 ; <i32*> [#uses=1]
@_ZN3WTFL10tsd_initedE.b = internal global i1 false ; <i1*> [#uses=2]
@_ZN3WTFL13pageheap_lockE = internal global %struct.SpinLock { %struct.PlatformMutex { i32 850045863, [40 x i8] zeroinitializer } } ; <%struct.SpinLock*> [#uses=1]
@_ZN3WTFL12thread_heapsE = internal global %"struct.WTF::TCMalloc_ThreadCache"* null ; <%"struct.WTF::TCMalloc_ThreadCache"**> [#uses=1]
@llvm.used = appending global [1 x i8*] [i8* bitcast (%"struct.WTF::TCMalloc_ThreadCache"* ()* @_ZN3WTF20TCMalloc_ThreadCache22CreateCacheIfNecessaryEv to i8*)], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0]
define %"struct.WTF::TCMalloc_ThreadCache"* @_ZN3WTF20TCMalloc_ThreadCache22CreateCacheIfNecessaryEv() nounwind {
entry:
%0 = tail call i32 @pthread_mutex_lock(%struct.PlatformMutex* getelementptr inbounds (%struct.SpinLock, %struct.SpinLock* @_ZN3WTFL13pageheap_lockE, i32 0, i32 0)) nounwind
%.b24 = load i1, i1* @_ZN3WTFL10tsd_initedE.b, align 4 ; <i1> [#uses=1]
br i1 %.b24, label %bb5, label %bb6
bb5: ; preds = %entry
%1 = tail call %struct._opaque_pthread_t* @pthread_self() nounwind
br label %bb6
bb6: ; preds = %bb5, %entry
%me.0 = phi %struct._opaque_pthread_t* [ %1, %bb5 ], [ null, %entry ] ; <%struct._opaque_pthread_t*> [#uses=2]
br label %bb11
bb7: ; preds = %bb11
%2 = getelementptr inbounds %"struct.WTF::TCMalloc_ThreadCache", %"struct.WTF::TCMalloc_ThreadCache"* %h.0, i32 0, i32 1
%3 = load %struct._opaque_pthread_t*, %struct._opaque_pthread_t** %2, align 4
%4 = tail call i32 @pthread_equal(%struct._opaque_pthread_t* %3, %struct._opaque_pthread_t* %me.0) nounwind
%5 = icmp eq i32 %4, 0
br i1 %5, label %bb10, label %bb14
bb10: ; preds = %bb7
%6 = getelementptr inbounds %"struct.WTF::TCMalloc_ThreadCache", %"struct.WTF::TCMalloc_ThreadCache"* %h.0, i32 0, i32 6
br label %bb11
bb11: ; preds = %bb10, %bb6
%h.0.in = phi %"struct.WTF::TCMalloc_ThreadCache"** [ @_ZN3WTFL12thread_heapsE, %bb6 ], [ %6, %bb10 ] ; <%"struct.WTF::TCMalloc_ThreadCache"**> [#uses=1]
%h.0 = load %"struct.WTF::TCMalloc_ThreadCache"*, %"struct.WTF::TCMalloc_ThreadCache"** %h.0.in, align 4 ; <%"struct.WTF::TCMalloc_ThreadCache"*> [#uses=4]
%7 = icmp eq %"struct.WTF::TCMalloc_ThreadCache"* %h.0, null
br i1 %7, label %bb13, label %bb7
bb13: ; preds = %bb11
%8 = tail call %"struct.WTF::TCMalloc_ThreadCache"* @_ZN3WTF20TCMalloc_ThreadCache7NewHeapEP17_opaque_pthread_t(%struct._opaque_pthread_t* %me.0) nounwind
br label %bb14
bb14: ; preds = %bb13, %bb7
%heap.1 = phi %"struct.WTF::TCMalloc_ThreadCache"* [ %8, %bb13 ], [ %h.0, %bb7 ] ; <%"struct.WTF::TCMalloc_ThreadCache"*> [#uses=4]
%9 = tail call i32 @pthread_mutex_unlock(%struct.PlatformMutex* getelementptr inbounds (%struct.SpinLock, %struct.SpinLock* @_ZN3WTFL13pageheap_lockE, i32 0, i32 0)) nounwind
%10 = getelementptr inbounds %"struct.WTF::TCMalloc_ThreadCache", %"struct.WTF::TCMalloc_ThreadCache"* %heap.1, i32 0, i32 2
%11 = load i8, i8* %10, align 4
%toBool15not = icmp eq i8 %11, 0 ; <i1> [#uses=1]
br i1 %toBool15not, label %bb19, label %bb22
bb19: ; preds = %bb14
%.b = load i1, i1* @_ZN3WTFL10tsd_initedE.b, align 4 ; <i1> [#uses=1]
br i1 %.b, label %bb21, label %bb22
bb21: ; preds = %bb19
store i8 1, i8* %10, align 4
%12 = load i32, i32* @_ZN3WTFL8heap_keyE, align 4
%13 = bitcast %"struct.WTF::TCMalloc_ThreadCache"* %heap.1 to i8*
%14 = tail call i32 @pthread_setspecific(i32 %12, i8* %13) nounwind
ret %"struct.WTF::TCMalloc_ThreadCache"* %heap.1
bb22: ; preds = %bb19, %bb14
ret %"struct.WTF::TCMalloc_ThreadCache"* %heap.1
}
declare i32 @pthread_mutex_lock(%struct.PlatformMutex*)
declare i32 @pthread_mutex_unlock(%struct.PlatformMutex*)
declare hidden %"struct.WTF::TCMalloc_ThreadCache"* @_ZN3WTF20TCMalloc_ThreadCache7NewHeapEP17_opaque_pthread_t(%struct._opaque_pthread_t*) nounwind
declare i32 @pthread_setspecific(i32, i8*)
declare %struct._opaque_pthread_t* @pthread_self()
declare i32 @pthread_equal(%struct._opaque_pthread_t*, %struct._opaque_pthread_t*)