1 files changed, 47 insertions, 0 deletions
diff --git a/llvm/test/Transforms/ConstantHoisting/X86/bad-cases.ll b/llvm/test/Transforms/ConstantHoisting/X86/bad-cases.ll
new file mode 100644
index 00000000000..00890942096
--- /dev/null
+++ b/llvm/test/Transforms/ConstantHoisting/X86/bad-cases.ll
@@ -0,0 +1,47 @@
+; RUN: opt -consthoist -S < %s | FileCheck %s
+target triple = "x86_64--"
+
+; We don't want to convert constant divides because the benefit from converting
+; them to a mul in the backend is larget than constant materialization savings.
+define void @signed_const_division(i64 %in1, i64 %in2, i64* %addr) {
+; CHECK-LABEL: @signed_const_division
+; CHECK: %res1 = sdiv i64 %l1, 4294967296
+; CHECK: %res2 = srem i64 %l2, 4294967296
+entry:
+  br label %loop
+
+loop:
+  %l1 = phi i64 [%res1, %loop], [%in1, %entry]
+  %l2 = phi i64 [%res2, %loop], [%in2, %entry]
+  %res1 = sdiv i64 %l1, 4294967296
+  store volatile i64 %res1, i64* %addr
+  %res2 = srem i64 %l2, 4294967296
+  store volatile i64 %res2, i64* %addr
+  %again = icmp eq i64 %res1, %res2
+  br i1 %again, label %loop, label %end
+
+end:
+  ret void
+}
+
+define void @unsigned_const_division(i64 %in1, i64 %in2, i64* %addr) {
+; CHECK-LABEL: @unsigned_const_division
+; CHECK: %res1 = udiv i64 %l1, 4294967296
+; CHECK: %res2 = urem i64 %l2, 4294967296
+
+entry:
+  br label %loop
+
+loop:
+  %l1 = phi i64 [%res1, %loop], [%in1, %entry]
+  %l2 = phi i64 [%res2, %loop], [%in2, %entry]
+  %res1 = udiv i64 %l1, 4294967296
+  store volatile i64 %res1, i64* %addr
+  %res2 = urem i64 %l2, 4294967296
+  store volatile i64 %res2, i64* %addr
+  %again = icmp eq i64 %res1, %res2
+  br i1 %again, label %loop, label %end
+
+end:
+  ret void
+}