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Unified Diff: test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc

Issue 1040053002: Reland "Match fneg for -0.0 - x pattern." (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 9 months ago
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Index: test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc
diff --git a/test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc b/test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc
index 02c8d2e06dd86156c4b04b90e97bd982818aed10..09ef9e8ecfb10f572b25b31d1837085c4988f7f2 100644
--- a/test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc
+++ b/test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc
@@ -2257,6 +2257,21 @@ TEST_F(InstructionSelectorTest, Word32Clz) {
EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
}
+
+TEST_F(InstructionSelectorTest, Float64SubWithMinusZero) {
+ StreamBuilder m(this, kMachFloat64, kMachFloat64);
+ Node* const p0 = m.Parameter(0);
+ Node* const n = m.Float64Sub(m.Float64Constant(-0.0), p0);
+ m.Return(n);
+ Stream s = m.Build();
+ ASSERT_EQ(1U, s.size());
+ EXPECT_EQ(kArm64Float64Neg, s[0]->arch_opcode());
+ ASSERT_EQ(1U, s[0]->InputCount());
+ EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
+ ASSERT_EQ(1U, s[0]->OutputCount());
+ EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
+}
+
} // namespace compiler
} // namespace internal
} // namespace v8
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