diff options
Diffstat (limited to 'deps/v8/src/compiler/backend/register-allocator.cc')
| -rw-r--r-- | deps/v8/src/compiler/backend/register-allocator.cc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/deps/v8/src/compiler/backend/register-allocator.cc b/deps/v8/src/compiler/backend/register-allocator.cc index c0c9db2bb1..f643cec765 100644 --- a/deps/v8/src/compiler/backend/register-allocator.cc +++ b/deps/v8/src/compiler/backend/register-allocator.cc @@ -1424,7 +1424,9 @@ bool TopTierRegisterAllocationData::ExistsUseWithoutDefinition() { PrintF("Register allocator error: live v%d reached first block.\n", operand_index); LiveRange* range = GetOrCreateLiveRangeFor(operand_index); - PrintF(" (first use is at %d)\n", range->first_pos()->pos().value()); + PrintF(" (first use is at position %d in instruction %d)\n", + range->first_pos()->pos().value(), + range->first_pos()->pos().ToInstructionIndex()); if (debug_name() == nullptr) { PrintF("\n"); } else { @@ -2606,6 +2608,8 @@ void LiveRangeBuilder::Verify() const { for (const UseInterval* i = first->next(); i != nullptr; i = i->next()) { // Except for the first interval, the other intevals must start at // a block boundary, otherwise data wouldn't flow to them. + // You might trigger this CHECK if your SSA is not valid. For instance, + // if the inputs of a Phi node are in the wrong order. CHECK(IntervalStartsAtBlockBoundary(i)); // The last instruction of the predecessors of the block the interval // starts must be covered by the range. |