[x86] add test for miscompiling setcc transform (PR40657); NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353580 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/setcc-combine.ll b/test/CodeGen/X86/setcc-combine.ll
index 9d2753c..d7f0a26 100644
--- a/test/CodeGen/X86/setcc-combine.ll
+++ b/test/CodeGen/X86/setcc-combine.ll
@@ -262,3 +262,21 @@
ret void
}
+; FIXME: This should not get folded to 0.
+
+define i64 @PR40657(i8 %var2, i8 %var9) {
+; CHECK-LABEL: PR40657:
+; CHECK: # %bb.0:
+; CHECK-NEXT: xorl %eax, %eax
+; CHECK-NEXT: retq
+ %var6 = trunc i8 %var9 to i1
+ %var7 = trunc i8 175 to i1
+ %var3 = sub nsw i1 %var6, %var7
+ %var4 = icmp eq i64 1114591064, 1114591064
+ %var1 = udiv i1 %var3, %var4
+ %var0 = trunc i8 %var2 to i1
+ %res = sub nsw nuw i1 %var0, %var1
+ %res.cast = zext i1 %res to i64
+ ret i64 %res.cast
+}
+
