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Use address-taken to disambiguate global variable and indirect memops.

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Major steps include:
 1). introduces a not-addr-taken bit-field in GlobalVariable
 2). GlobalOpt pass sets "not-address-taken" if it proves a global varirable 
    dosen't have its address taken.
 3). AA use this info for disambiguation. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193251 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Shuxin Yang
2013-10-23 17:28:19 +00:00
parent f39fe46062
commit 8e3851a6eb
18 changed files with 72 additions and 11 deletions
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2
test/Transforms/GlobalOpt/integer-bool.ll
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@@ -4,7 +4,7 @@
@G = internal addrspace(1) global i32 0
; CHECK: @G
; CHECK: addrspace(1)
; CHECK: global i1 false
; CHECK: global notaddrtaken i1 false
define void @set1() {
store i32 0, i32 addrspace(1)* @G