6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-19 06:31:18 +00:00
Code Issues Projects Releases Wiki Activity

[stackprotector] Small Bit of computation hoisting.

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
lib/CodeGen/StackProtector.cpp
View File

@ -387,7 +387,8 @@ static bool CreatePrologue(Function *F, Module *M, ReturnInst *RI,
/// value. It calls __stack_chk_fail if they differ. /// value. It calls __stack_chk_fail if they differ.
bool StackProtector::InsertStackProtectors() { bool StackProtector::InsertStackProtectors() {
bool HasPrologue = false; bool HasPrologue = false;
bool SupportsSelectionDAGSP = false; bool SupportsSelectionDAGSP =
EnableSelectionDAGSP && !TM->Options.EnableFastISel;
AllocaInst *AI = 0; // Place on stack that stores the stack guard. AllocaInst *AI = 0; // Place on stack that stores the stack guard.
Value *StackGuardVar = 0; // The stack guard variable. Value *StackGuardVar = 0; // The stack guard variable.
@ -398,12 +399,11 @@ bool StackProtector::InsertStackProtectors() {
if (!HasPrologue) { if (!HasPrologue) {
HasPrologue = true; HasPrologue = true;
SupportsSelectionDAGSP = CreatePrologue(F, M, RI, TLI, Trip, AI, SupportsSelectionDAGSP &= CreatePrologue(F, M, RI, TLI, Trip, AI,
StackGuardVar); StackGuardVar);
} }
if (EnableSelectionDAGSP && !TM->Options.EnableFastISel && if (SupportsSelectionDAGSP) {
SupportsSelectionDAGSP) {
// Since we have a potential tail call, insert the special stack check // Since we have a potential tail call, insert the special stack check
// intrinsic. // intrinsic.
Instruction *InsertionPt = 0; Instruction *InsertionPt = 0;