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8362171: C2 fails with unexpected node in SuperWord truncation: ModI #26334

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8362171: C2 fails with unexpected node in SuperWord truncation: ModI #26334

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1 change: 1 addition & 0 deletions src/hotspot/share/opto/superword.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2581,6 +2581,7 @@ static bool can_subword_truncate(Node* in, const Type* type) {
switch (opc) {
case Op_AbsI:
case Op_DivI:
case Op_ModI:
case Op_MinI:
case Op_MaxI:
case Op_CMoveI:
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14 changes: 13 additions & 1 deletion test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java
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Expand Up @@ -29,7 +29,7 @@

/*
* @test
* @bug 8350177
* @bug 8350177 8362171
* @summary Ensure that truncation of subword vectors produces correct results
* @library /test/lib /
* @run driver compiler.vectorization.TestSubwordTruncation
Expand Down Expand Up @@ -376,6 +376,18 @@ public void checkTestByteBitCount(Object[] vals) {
}
}

int intField;
short shortField;

@Test
@IR(counts = { IRNode.MOD_I, ">0" })
public void testMod() {
for (int i = 1; i < SIZE; i++) {
for (int j = 1; j < 204; j++) {
shortField %= intField | 1;
}
}
}

public static void main(String[] args) {
TestFramework.run();
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