tree 2a99c1a64a71e2f119cbce2d5ccc7ae4f16f8d18
parent 259523f75aad17a4d5bf93eff32c1e8dcea62e12
author Jeremy Morse <jeremy.morse.llvm@gmail.com> 1550065053 +0000
committer Jeremy Morse <jeremy.morse.llvm@gmail.com> 1550065053 +0000

[DebugInfo][DAG] Limit special-casing of dbg.values for Arguments

SelectionDAGBuilder has special handling for dbg.value intrinsics that are
understood to define the location of function parameters on entry to the
function. To enable this, we avoid recording a dbg.value as a virtual register
reference if it might be such a parameter, so that it later hits
EmitFuncArgumentDbgValue.

This patch reduces the set of circumstances where we avoid recording a
dbg.value as a virtual register reference, to allow more "normal" variables
to be recorded that way. We now only bypass for potential parameters if:
 * The dbg.value operand is an Argument,
 * The Variable is a parameter, and
 * The Variable is not inlined.
meaning it's very likely that the dbg.value is a function-entry parameter
location.

Differential Revision: https://reviews.llvm.org/D57584


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353948 91177308-0d34-0410-b5e6-96231b3b80d8