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llvm_ir_generator: add TBAA metadata for @now.

This commit is contained in:
whitequark 2016-04-02 18:19:14 +00:00
parent b1f371e578
commit a1e98a4437
1 changed files with 11 additions and 2 deletions
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13
artiq/compiler/transforms/llvm_ir_generator.py
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@ -154,6 +154,10 @@ class LLVMIRGenerator:
self.tbaa_tree,
ll.Constant(lli64, 1)
])
self.tbaa_now = self.llmodule.add_metadata([
ll.MetaDataString(self.llmodule, "timeline position"),
self.tbaa_tree
])
def needs_sret(self, lltyp, may_be_large=True):
if isinstance(lltyp, ll.VoidType):
@ -1050,7 +1054,9 @@ class LLVMIRGenerator:
# This is an identity cast at LLVM IR level.
return self.map(insn.operands[0])
elif insn.op == "now_mu":
return self.llbuilder.load(self.llbuiltin("now"), name=insn.name)
llnow = self.llbuilder.load(self.llbuiltin("now"), name=insn.name)
llnow.set_metadata("tbaa", self.tbaa_now)
return llnow
elif insn.op == "at_mu":
time, = insn.operands
return self.llbuilder.store(self.map(time), self.llbuiltin("now"))
@ -1058,8 +1064,11 @@ class LLVMIRGenerator:
interval, = insn.operands
llnowptr = self.llbuiltin("now")
llnow = self.llbuilder.load(llnowptr, name="now.old")
llnow.set_metadata("tbaa", self.tbaa_now)
lladjusted = self.llbuilder.add(llnow, self.map(interval), name="now.new")
return self.llbuilder.store(lladjusted, llnowptr)
llnowstore = self.llbuilder.store(lladjusted, llnowptr)
llnowstore.set_metadata("tbaa", self.tbaa_now)
return llnowstore
elif insn.op == "watchdog_set":
interval, = insn.operands
return self.llbuilder.call(self.llbuiltin("watchdog_set"), [self.map(interval)])