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ARM IAS: support .movsp

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.movsp is an ARM unwinding directive that indicates to the unwinder that a
register contains an offset from the current stack pointer.  If the offset is
unspecified, it defaults to zero.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200449 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool
2014-01-30 04:46:24 +00:00
parent 2c9ed5d050
commit 7a38b33dec
6 changed files with 249 additions and 6 deletions
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6
lib/Target/ARM/ARMAsmPrinter.cpp
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@@ -1091,11 +1091,11 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
// instruction.
ATS.emitPad(Offset);
} else {
MI->dump();
llvm_unreachable("Unsupported opcode for unwinding information");
// Move of SP to a register. Positive values correspond to an "add"
// instruction.
ATS.emitMovSP(DstReg, -Offset);
}
} else if (DstReg == ARM::SP) {
// FIXME: .movsp goes here
MI->dump();
llvm_unreachable("Unsupported opcode for unwinding information");
}