Instruction *IVIncInsertPos;
/// Interesting factors between use strides.
- SmallSetVector<int64_t, 8> Factors;
+ ///
+ /// We explicitly use a SetVector which contains a SmallSet, instead of the
+ /// default, a SmallDenseSet, because we need to use the full range of
+ /// int64_ts, and there's currently no good way of doing that with
+ /// SmallDenseSet.
+ SetVector<int64_t, SmallVector<int64_t, 8>, SmallSet<int64_t, 8>> Factors;
/// Interesting use types, to facilitate truncation reuse.
SmallSetVector<Type *, 4> Types;
--- /dev/null
+; RUN: llc < %s -o /dev/null
+
+; Check that this doesn't crash (by virtue of using INT64_MAX as a constant in
+; the loop).
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.12.0"
+
+define void @foo() {
+entry:
+ br label %for
+
+for:
+ %0 = phi i64 [ %add, %for ], [ undef, %entry ]
+ %next = phi i32 [ %inc, %for ], [ undef, %entry ]
+ store i32 %next, i32* undef, align 4
+ %add = add i64 %0, 9223372036854775807
+ %inc = add nsw i32 %next, 1
+ br i1 undef, label %exit, label %for
+
+exit:
+ store i64 %add, i64* undef
+ ret void
+}