From 177d87ac8d974529b07430b2088f699ed279cd1d Mon Sep 17 00:00:00 2001 From: Andrew Trick Date: Sat, 1 Dec 2012 01:22:44 +0000 Subject: misched: Fix the DAG builder to handle an undef operand at ExitSU. Assertion failed: (VNI && "No value to read by operand") rdar://12790267. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169071 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/ScheduleDAGInstrs.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'lib/CodeGen') diff --git a/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp index 2b00b59..fd75576 100644 --- a/lib/CodeGen/ScheduleDAGInstrs.cpp +++ b/lib/CodeGen/ScheduleDAGInstrs.cpp @@ -210,7 +210,8 @@ void ScheduleDAGInstrs::addSchedBarrierDeps() { Uses[Reg].push_back(PhysRegSUOper(&ExitSU, -1)); else { assert(!IsPostRA && "Virtual register encountered after regalloc."); - addVRegUseDeps(&ExitSU, i); + if (MO.readsReg()) // ignore undef operands + addVRegUseDeps(&ExitSU, i); } } } else { -- cgit v1.1