Some targets, PowerPC for example, have pseudo-registers (such as that used to
represent the rounding mode), that don't have DWARF register numbers or a
register class. These are used only for internal dependency tracking, and
should not appear in the recorded live-outs. This adds a callback allowing the
target to pre-process the live-out mask in order to remove these kinds of
registers so that the StackMaps code does not complain about them and/or
attempt to include them in the output.
This will be used by the PowerPC target in a future commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225805
91177308-0d34-0410-b5e6-
96231b3b80d8
/// used by register scavenger to determine what registers are free.
virtual BitVector getReservedRegs(const MachineFunction &MF) const = 0;
+ /// Prior to adding the live-out mask to a stackmap or patchpoint
+ /// instruction, provide the target the opportunity to adjust it (mainly to
+ /// remove pseudo-registers that should be ignored).
+ virtual void adjustStackMapLiveOutMask(uint32_t *Mask) const { }
+
/// getMatchingSuperReg - Return a super-register of the specified register
/// Reg so its sub-register of index SubIdx is Reg.
unsigned getMatchingSuperReg(unsigned Reg, unsigned SubIdx,
for (LivePhysRegs::const_iterator RI = LiveRegs.begin(), RE = LiveRegs.end();
RI != RE; ++RI)
Mask[*RI / 32] |= 1U << (*RI % 32);
+
+ TRI->adjustStackMapLiveOutMask(Mask);
return Mask;
}