fix trivial index map [] -> [0]

wrongtest · wrongtest · commit 2450f74f194d · 2025-07-19T05:46:56.000Z
diff --git a/src/tir/ir/index_map.cc b/src/tir/ir/index_map.cc
@@ -218,7 +218,7 @@ Array<Range> IndexMapNode::MapRanges(const Array<Range>& ranges, arith::Analyzer
     }
   }
   auto output_dtype = [&]() {
-    int max_bits = 0;
+    int max_bits = ranges.empty() ? 32 : 0;
     for (const auto& range : ranges) {
       max_bits = std::max(max_bits, range->extent.dtype().bits());
     }

Original file line number	Diff line number	Diff line change
`@@ -218,7 +218,7 @@ Array<Range> IndexMapNode::MapRanges(const Array<Range>& ranges, arith::Analyzer`
`218`	`218`	`}`
`219`	`219`	`}`
`220`	`220`	`auto output_dtype = [&]() {`
`221`		`- int max_bits = 0;`
	`221`	`+ int max_bits = ranges.empty() ? 32 : 0;`
`222`	`222`	`for (const auto& range : ranges) {`
`223`	`223`	`max_bits = std::max(max_bits, range->extent.dtype().bits());`
`224`	`224`	`}`