Fix a typo.

[oota-llvm.git] / lib / Target / README.txt

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 33941f451a0cab6389313149c34c8f9d1ea24155..99616b47c841401f05ee90aa18dfa068a2794228 100644 (file)
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -2238,4 +2238,23 @@ missed cases:
 
 //===---------------------------------------------------------------------===//
 
+define i1 @test1(i32 %x) nounwind {
+  %and = and i32 %x, 3
+  %cmp = icmp ult i32 %and, 2
+  ret i1 %cmp
+}
+
+Can be folded to (x & 2) == 0.
+
+define i1 @test2(i32 %x) nounwind {
+  %and = and i32 %x, 3
+  %cmp = icmp ugt i32 %and, 1
+  ret i1 %cmp
+}
 
+Can be folded to (x & 2) != 0.
+
+SimplifyDemandedBits shrinks the "and" constant to 2 but instcombine misses the
+icmp transform.
+
+//===---------------------------------------------------------------------===//