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author | Quentin Colombet <qcolombet@apple.com> | 2013-06-08 00:07:54 +0000 |
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committer | Quentin Colombet <qcolombet@apple.com> | 2013-06-08 00:07:54 +0000 |
commit | c0cc28301a7fa71ae895dd637058e0624f6bd399 (patch) | |
tree | 0d1d0ee0add8ffdce7a2490afb130510a4fead3d /lib/CodeGen | |
parent | 843c6c2d0e83bcd52a215d768bacaa7b5ffe16a4 (diff) | |
download | llvm-c0cc28301a7fa71ae895dd637058e0624f6bd399.tar.gz llvm-c0cc28301a7fa71ae895dd637058e0624f6bd399.tar.bz2 llvm-c0cc28301a7fa71ae895dd637058e0624f6bd399.tar.xz |
Reapply r183552. This time, use a standard type for the option to avoid template
instantiation issue with non-standard type.
Add a backend option to warn on a given stack size limit.
Option: -mllvm -warn-stack-size=<limit>
Output (if limit is exceeded):
warning: Stack size limit exceeded (<actual size>) in <functionName>.
The longer term plan is to hook that to a clang warning.
PR:4072
<rdar://problem/13987214>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183595 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
-rw-r--r-- | lib/CodeGen/PrologEpilogInserter.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp index 959dd7df58..4b301d84ca 100644 --- a/lib/CodeGen/PrologEpilogInserter.cpp +++ b/lib/CodeGen/PrologEpilogInserter.cpp @@ -35,6 +35,7 @@ #include "llvm/Support/CommandLine.h" #include "llvm/Support/Compiler.h" #include "llvm/Support/Debug.h" +#include "llvm/Support/raw_ostream.h" #include "llvm/Target/TargetFrameLowering.h" #include "llvm/Target/TargetInstrInfo.h" #include "llvm/Target/TargetMachine.h" @@ -46,6 +47,11 @@ using namespace llvm; char PEI::ID = 0; char &llvm::PrologEpilogCodeInserterID = PEI::ID; +static cl::opt<unsigned> +WarnStackSize("warn-stack-size", cl::Hidden, cl::init((unsigned)-1), + cl::desc("Warn for stack size bigger than the given" + " number")); + INITIALIZE_PASS_BEGIN(PEI, "prologepilog", "Prologue/Epilogue Insertion", false, false) INITIALIZE_PASS_DEPENDENCY(MachineLoopInfo) @@ -128,6 +134,13 @@ bool PEI::runOnMachineFunction(MachineFunction &Fn) { // Clear any vregs created by virtual scavenging. Fn.getRegInfo().clearVirtRegs(); + // Warn on stack size when we exceeds the given limit. + MachineFrameInfo *MFI = Fn.getFrameInfo(); + if (WarnStackSize.getNumOccurrences() > 0 && + WarnStackSize < MFI->getStackSize()) + errs() << "warning: Stack size limit exceeded (" << MFI->getStackSize() + << ") in " << Fn.getName() << ".\n"; + delete RS; clearAllSets(); return true; |