[wasm] Int64Lowering of I64ShrU and I64ShrS on ia32.

test/unittests/compiler/int64-lowering-unittest.cc

Index: test/unittests/compiler/int64-lowering-unittest.cc
diff --git a/test/unittests/compiler/int64-lowering-unittest.cc b/test/unittests/compiler/int64-lowering-unittest.cc
index a1bb341cadbc8e1777ca61b28fbcb0696d0853fa..eb605b91da0f0e03c6b71519b71132532c84e1e8 100644
--- a/test/unittests/compiler/int64-lowering-unittest.cc
+++ b/test/unittests/compiler/int64-lowering-unittest.cc
@@ -374,7 +374,41 @@ TEST_F(Int64LoweringTest, Int64Shl) {
                         start(), start()));
 }
 // kExprI64ShrU:
+TEST_F(Int64LoweringTest, Int64ShrU) {
+  if (4 != kPointerSize) return;

[titzer, 2016/03/07 19:25:35]

Sorry I didn't notice this before. You shouldn't check the pointer size, but you
should make a MachineOperatorBuilder with the appropriate word size. Similarly
in in64-lowering; you should check the word size of the MachineOperatorBuilder.

[ahaas, 2016/03/08 07:58:42]

I created a separate CL(https://codereview.chromium.org/1770333002) for this.

+
+  LowerGraph(graph()->NewNode(machine()->Word64Shr(), Int64Constant(value(0)),
+                              Int64Constant(value(1))),
+             MachineRepresentation::kWord64);
+
+  Capture<Node*> shr;
+  Matcher<Node*> shr_matcher = IsWord32PairShr(
+      IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
+      IsInt32Constant(low_word_value(1)));
+
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn2(IsProjection(0, AllOf(CaptureEq(&shr), shr_matcher)),
+                        IsProjection(1, AllOf(CaptureEq(&shr), shr_matcher)),
+                        start(), start()));
+}
 // kExprI64ShrS:
+TEST_F(Int64LoweringTest, Int64ShrS) {
+  if (4 != kPointerSize) return;
+
+  LowerGraph(graph()->NewNode(machine()->Word64Sar(), Int64Constant(value(0)),
+                              Int64Constant(value(1))),
+             MachineRepresentation::kWord64);
+
+  Capture<Node*> sar;
+  Matcher<Node*> sar_matcher = IsWord32PairSar(
+      IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
+      IsInt32Constant(low_word_value(1)));
+
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn2(IsProjection(0, AllOf(CaptureEq(&sar), sar_matcher)),
+                        IsProjection(1, AllOf(CaptureEq(&sar), sar_matcher)),
+                        start(), start()));
+}
 // kExprI64Eq:
 TEST_F(Int64LoweringTest, Int64Eq) {
   if (4 != kPointerSize) return;