BUG=
Review URL: https://codereview.chromium.org/
852633002
Cr-Commit-Position: refs/heads/master@{#26068}
}
+TEST_F(RegisterAllocatorTest, RegressionLoadConstantBeforeSpill) {
+ StartBlock();
+ // Fill registers.
+ VReg values[kDefaultNRegs];
+ for (size_t i = arraysize(values); i > 0; --i) {
+ values[i - 1] = Define(Reg(static_cast<int>(i - 1)));
+ }
+ auto c = DefineConstant();
+ auto to_spill = Define(Reg());
+ EndBlock(Jump(1));
+
+ {
+ StartLoop(1);
+
+ StartBlock();
+ // Create a use for c in second half of prev block's last gap
+ Phi(c);
+ for (size_t i = arraysize(values); i > 0; --i) {
+ Phi(values[i - 1]);
+ }
+ EndBlock(Jump(1));
+
+ EndLoop();
+ }
+
+ StartBlock();
+ // Force c to split within to_spill's definition.
+ EmitI(Reg(c));
+ EmitI(Reg(to_spill));
+ EndBlock(Last());
+
+ Allocate();
+}
+
} // namespace compiler
} // namespace internal
} // namespace v8