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[stackprotector] Small Bit of computation hoisting.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188771 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2013-08-20 08:56:26 +00:00
parent b99272a521
commit d4f478899e
1 changed files with 5 additions and 5 deletions
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10
lib/CodeGen/StackProtector.cpp
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@ -387,7 +387,8 @@ static bool CreatePrologue(Function *F, Module *M, ReturnInst *RI,
/// value. It calls __stack_chk_fail if they differ.
bool StackProtector::InsertStackProtectors() {
bool HasPrologue = false;
bool SupportsSelectionDAGSP = false;
bool SupportsSelectionDAGSP =
EnableSelectionDAGSP && !TM->Options.EnableFastISel;
AllocaInst *AI = 0; // Place on stack that stores the stack guard.
Value *StackGuardVar = 0; // The stack guard variable.
@ -398,12 +399,11 @@ bool StackProtector::InsertStackProtectors() {
if (!HasPrologue) {
HasPrologue = true;
SupportsSelectionDAGSP = CreatePrologue(F, M, RI, TLI, Trip, AI,
StackGuardVar);
SupportsSelectionDAGSP &= CreatePrologue(F, M, RI, TLI, Trip, AI,
StackGuardVar);
}
if (EnableSelectionDAGSP && !TM->Options.EnableFastISel &&
SupportsSelectionDAGSP) {
if (SupportsSelectionDAGSP) {
// Since we have a potential tail call, insert the special stack check
// intrinsic.
Instruction *InsertionPt = 0;