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677c6ecd08
walking the asm arguments once and stashing their Values. This is wrong because the same memory location can be in the list twice, and if the first one has a sunkaddr substituted, the stashed value for the second one will be wrong (use-after-free). PR 8154. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114104 91177308-0d34-0410-b5e6-96231b3b80d8
57 lines
2.1 KiB
LLVM
57 lines
2.1 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-unknown-freebsd8.1 -o /dev/null
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; This formerly crashed, PR 8154.
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module asm ".weak sem_close"
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module asm ".equ sem_close, _sem_close"
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module asm ".weak sem_destroy"
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module asm ".equ sem_destroy, _sem_destroy"
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module asm ".weak sem_getvalue"
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module asm ".equ sem_getvalue, _sem_getvalue"
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module asm ".weak sem_init"
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module asm ".equ sem_init, _sem_init"
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module asm ".weak sem_open"
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module asm ".equ sem_open, _sem_open"
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module asm ".weak sem_post"
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module asm ".equ sem_post, _sem_post"
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module asm ".weak sem_timedwait"
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module asm ".equ sem_timedwait, _sem_timedwait"
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module asm ".weak sem_trywait"
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module asm ".equ sem_trywait, _sem_trywait"
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module asm ".weak sem_unlink"
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module asm ".equ sem_unlink, _sem_unlink"
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module asm ".weak sem_wait"
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module asm ".equ sem_wait, _sem_wait"
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%struct._sem = type { i32, %struct._usem }
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%struct._usem = type { i32, i32, i32 }
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define void @_sem_timedwait(%struct._sem* noalias %sem) nounwind ssp {
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entry:
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br i1 undef, label %while.cond.preheader, label %sem_check_validity.exit
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while.cond.preheader: ; preds = %entry
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%tmp4 = getelementptr inbounds %struct._sem* %sem, i64 0, i32 1, i32 1
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br label %while.cond
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sem_check_validity.exit: ; preds = %entry
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ret void
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while.cond: ; preds = %while.body, %while.cond.preheader
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br i1 undef, label %while.body, label %while.end
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while.body: ; preds = %while.cond
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%0 = call i8 asm sideeffect "\09lock ; \09\09\09cmpxchgl $2,$1 ;\09 sete\09$0 ;\09\091:\09\09\09\09# atomic_cmpset_int", "={ax},=*m,r,{ax},*m,~{memory},~{dirflag},~{fpsr},~{flags}"(i32* %tmp4, i32 undef, i32 undef, i32* %tmp4) nounwind, !srcloc !0
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br i1 undef, label %while.cond, label %return
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while.end: ; preds = %while.cond
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br i1 undef, label %if.end18, label %return
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if.end18: ; preds = %while.end
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unreachable
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return: ; preds = %while.end, %while.body
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ret void
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}
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!0 = metadata !{i32 158484}
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