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author | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-10-23 17:28:19 +0000 |
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committer | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-10-23 17:28:19 +0000 |
commit | 8e3851a6eb9fe5fc30094c3a00d2b89c7cd68cbd (patch) | |
tree | aa761eb31c1f7c14a3c9e313f4a1d29ea06e066b /include/llvm/IR/GlobalVariable.h | |
parent | f39fe46062d2093fc3d7c092bc8c4561b744164c (diff) | |
download | llvm-8e3851a6eb9fe5fc30094c3a00d2b89c7cd68cbd.tar.gz llvm-8e3851a6eb9fe5fc30094c3a00d2b89c7cd68cbd.tar.bz2 llvm-8e3851a6eb9fe5fc30094c3a00d2b89c7cd68cbd.tar.xz |
Use address-taken to disambiguate global variable and indirect memops.
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
Diffstat (limited to 'include/llvm/IR/GlobalVariable.h')
-rw-r--r-- | include/llvm/IR/GlobalVariable.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/llvm/IR/GlobalVariable.h b/include/llvm/IR/GlobalVariable.h index bfed50786e..a5ab97db23 100644 --- a/include/llvm/IR/GlobalVariable.h +++ b/include/llvm/IR/GlobalVariable.h @@ -48,6 +48,7 @@ class GlobalVariable : public GlobalValue, public ilist_node<GlobalVariable> { // can change from its initial // value before global // initializers are run? + bool notAddrTaken : 1; // Dose not have address taken. public: // allocate space for exactly one operand @@ -174,6 +175,9 @@ public: isExternallyInitializedConstant = Val; } + void setAddressMaybeTaken(bool Val) { notAddrTaken = !Val; } + bool AddressMaybeTaken(void) const { return !notAddrTaken; } + /// copyAttributesFrom - copy all additional attributes (those not needed to /// create a GlobalVariable) from the GlobalVariable Src to this one. void copyAttributesFrom(const GlobalValue *Src); |