[llvm] [SCEV] BECount to zero if `((-C + (C smax %x)) /u %x), C > 0` holds (PR #104580)

[Philip Reames via llvm-commits]

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@@ -0,0 +1,78 @@
+; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
+; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
+
+ at g_var = external local_unnamed_addr global i32, align 4
+
+define void @test(i32 noundef %x) {
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preames wrote:

This needs to be rewritten as a purely SCEV test (i.e. no LV dependence, and simplified) to be accepted.

https://github.com/llvm/llvm-project/pull/104580