From 4b0dc3b458dc0a2a95dcea44e63946d11416a58a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C3=ABl=20Zasso?= Date: Fri, 30 Apr 2021 12:56:37 +0200 Subject: [PATCH] deps: V8: cherry-pick ab2340a9b994 Original commit message: M86-LTS: [compiler] Fix a bug in VisitSpeculativeIntegerAdditiveOp (cherry picked from commit 9313c4ce3f32ad81df1c65becccec7e129181ce3) No-Try: true No-Presubmit: true No-Tree-Checks: true Bug: chromium:1199345 Change-Id: I33bf71b33f43919fec4684054b5bf0a0787930ca Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2831478 Reviewed-by: Nico Hartmann Commit-Queue: Georg Neis Cr-Original-Commit-Position: refs/heads/master@{#74008} Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2848412 Commit-Queue: Artem Sumaneev Reviewed-by: Victor-Gabriel Savu Cr-Commit-Position: refs/branch-heads/8.6@{#86} Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1} Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472} Refs: https://github.com/v8/v8/commit/ab2340a9b99409c94553eea0f79eed0e19903107 --- common.gypi | 2 +- deps/v8/src/compiler/simplified-lowering.cc | 11 ++++++++--- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/common.gypi b/common.gypi index d4b6b91e18f113..2a849923d3b936 100644 --- a/common.gypi +++ b/common.gypi @@ -36,7 +36,7 @@ # Reset this number to 0 on major V8 upgrades. # Increment by one for each non-official patch applied to deps/v8. - 'v8_embedder_string': '-node.61', + 'v8_embedder_string': '-node.62', ##### V8 defaults for Node.js ##### diff --git a/deps/v8/src/compiler/simplified-lowering.cc b/deps/v8/src/compiler/simplified-lowering.cc index a9229617dad037..156d4fcef058ed 100644 --- a/deps/v8/src/compiler/simplified-lowering.cc +++ b/deps/v8/src/compiler/simplified-lowering.cc @@ -1426,10 +1426,15 @@ class RepresentationSelector { Type right_feedback_type = TypeOf(node->InputAt(1)); // Using Signed32 as restriction type amounts to promising there won't be - // signed overflow. This is incompatible with relying on a Word32 - // truncation in order to skip the overflow check. + // signed overflow. This is incompatible with relying on a Word32 truncation + // in order to skip the overflow check. Similarly, we must not drop -0 from + // the result type unless we deopt for -0 inputs. Type const restriction = - truncation.IsUsedAsWord32() ? Type::Any() : Type::Signed32(); + truncation.IsUsedAsWord32() + ? Type::Any() + : (truncation.identify_zeros() == kIdentifyZeros) + ? Type::Signed32OrMinusZero() + : Type::Signed32(); // Handle the case when no int32 checks on inputs are necessary (but // an overflow check is needed on the output). Note that we do not