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Calls don't really change the stack pointer. 

Even if a call instruction has %SP<imp-def> operands, it doesn't change
the value of the stack pointer.

llvm-svn: 151104
This commit is contained in:
Jakob Stoklund Olesen 2012-02-21 23:47:43 +00:00
parent c481c0c0f5
commit 6909faaf35
1 changed files with 2 additions and 1 deletions
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3
llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
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@ -1400,7 +1400,8 @@ bool ARMBaseInstrInfo::isSchedulingBoundary(const MachineInstr *MI,
// saves compile time, because it doesn't require every single
// stack slot reference to depend on the instruction that does the
// modification.
if (MI->definesRegister(ARM::SP))
// Calls don't actually change the stack pointer, even if they have imp-defs.
if (!MI->isCall() && MI->definesRegister(ARM::SP))
return true;
return false;