http://llvm.org/bugs/show_bug.cgi?id=16322
Bug ID: 16322
Summary: ARM FastISel emits wrong code when omitting frame
pointers and the frames are huge
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: ARM
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
lib/Target/ARM/ARMFastISel.cpp:ARM::createFastISel has the following code:
// iOS always has a FP for backtracking, force other targets
// to keep their FP when doing FastISel. The emitted code is
// currently superior, and in cases like test-suite's lencod
// FastISel isn't quite correct when FP is eliminated.
TM.Options.NoFramePointerElim = true;
FastISel should be able to omit frame pointers with correct code that performs
well. It currently falls short on both accounts.
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