Re-apply r245635, "[InstCombine] Transform A & (L - 1) u< L --> L != 0"

[oota-llvm.git] / test / Transforms / InstCombine / icmp.ll

diff --git a/test/Transforms/InstCombine/icmp.ll b/test/Transforms/InstCombine/icmp.ll
index edcf76d5a7d2cbf451f23281d8cd2facc3b03614..5d97411625ebf6a8d587ac5e58d9780ef53fa01a 100644 (file)
--- a/test/Transforms/InstCombine/icmp.ll
+++ b/test/Transforms/InstCombine/icmp.ll
@@ -1603,3 +1603,23 @@ define i32 @f7(i32 %a, i32 %b) {
   %s = select i1 %cmp, i32 10000, i32 0
   ret i32 %s
 }
   %s = select i1 %cmp, i32 10000, i32 0
   ret i32 %s
 }

+
+; CHECK: @f8(
+; CHECK-NEXT: [[RESULT:%[a-z0-9]+]] = icmp ne i32 %lim, 0
+; CHECK-NEXT: ret i1 [[RESULT]]
+define i1 @f8(i32 %val, i32 %lim) {
+  %lim.sub = add i32 %lim, -1
+  %val.and = and i32 %val, %lim.sub
+  %r = icmp ult i32 %val.and, %lim
+  ret i1 %r
+}
+
+; CHECK: @f9(
+; CHECK-NEXT: [[RESULT:%[a-z0-9]+]] = icmp ne i32 %lim, 0
+; CHECK-NEXT: ret i1 [[RESULT]]
+define i1 @f9(i32 %val, i32 %lim) {
+  %lim.sub = sub i32 %lim, 1
+  %val.and = and i32 %val, %lim.sub
+  %r = icmp ult i32 %val.and, %lim
+  ret i1 %r
+}