maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

SP relative offsets need to be adjusted by the local allocation size when 

determining if they're likely to be in range of the SP when resolving
frame references.

llvm-svn: 112624
This commit is contained in:
Jim Grosbach 2010-08-31 18:52:31 +00:00
parent 8559932d36
commit 9ce9210e47
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
llvm/lib/Target/ARM/ARMBaseRegisterInfo.cpp
View File

@ -1480,7 +1480,11 @@ needsFrameBaseReg(MachineInstr *MI, int64_t Offset) const {
if (!AFI->isThumbFunction() || !AFI->isThumb1OnlyFunction())
FPOffset -= 80;
// Estimate an offset from the stack pointer.
// The incoming offset is relating to the SP at the start of the function,
// but when we access the local it'll be relative to the SP after local
// allocation, so adjust our SP-relative offset by that allocation size.
Offset = -Offset;
Offset += MFI->getLocalFrameSize();
// Assume that we'll have at least some spill slots allocated.
// FIXME: This is a total SWAG number. We should run some statistics
// and pick a real one.