Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b
2020-01-16 16:38:04 +00:00
parent d94e79959b
commit 468663ddbb
48518 changed files with 2789335 additions and 61176 deletions
--- a/external/llvm-project/llvm/test/Analysis/ScalarEvolution/undefined.ll
+++ b/external/llvm-project/llvm/test/Analysis/ScalarEvolution/undefined.ll
@@ -0,0 +1,39 @@
+; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
+
+; ScalarEvolution shouldn't attempt to interpret expressions which have
+; undefined results.
+
+define void @foo(i64 %x) {
+
+  %a = udiv i64 %x, 0
+; CHECK: -->  (%x /u 0)
+
+  %B = shl i64 %x, 64
+; CHECK: -->  %B
+
+  %b = ashr i64 %B, 64
+; CHECK: -->  %b
+
+  %c = lshr i64 %x, 64
+; CHECK: -->  %c
+
+  %d = shl i64 %x, 64
+; CHECK: -->  %d
+
+  %E = shl i64 %x, -1
+; CHECK: -->  %E
+
+  %e = ashr i64 %E, -1
+; CHECK: -->  %e
+
+  %f = lshr i64 %x, -1
+; CHECK: -->  %f
+
+  %g = shl i64 %x, -1
+; CHECK: -->  %g
+
+  %h = bitcast i64 undef to i64
+; CHECK: -->  undef
+
+  ret void
+}