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Fix false warning on backward indexing, bug1507.

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This commit is contained in:
Wilson Snyder 2019-09-17 15:17:23 -04:00
parent 3469c78153
commit 900115bb2d
3 changed files with 6 additions and 1 deletions
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@ -14,6 +14,8 @@ The contributors that suggested a given feature are shown in []. Thanks!
**** Fix config_rev revision detection on old versions.
**** Fix false warning on backward indexing, bug1507. [Hao Shi]
* Verilator 4.018 2019-08-29

3
src/V3Width.cpp
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@ -755,7 +755,8 @@ private:
<<" outside data type's '"<< adtypep->declRange() << "'");
}
else if ((nodep->declRange().littleEndian()
!= adtypep->declRange().littleEndian())) {
!= adtypep->declRange().littleEndian())
&& nodep->declRange().hi() != nodep->declRange().lo()) {
nodep->v3error("Slice selection '"<< nodep->declRange() << "'"
<<" has backward indexing versus data type's '"
<<adtypep->declRange() << "'");

2
test_regress/t/t_array_backw_index_bad.v
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@ -15,6 +15,8 @@ module t (/*AUTOARG*/);
array_assign[4:3] = '{32'd4, 32'd3};
array_assign[1:-1] = '{32'd4, 32'd3};
array_assign[1:1] = '{32'd4}; // Ok
larray_assign[1:1] = '{32'd4}; // Ok
$write("*-* All Finished *-*\n");
$finish;