Vendor import of llvm trunk r300422:vendor/llvm/llvm-trunk-r300422

https://llvm.org/svn/llvm-project/llvm/trunk@300422

1 files changed, 31 insertions, 0 deletions

diff --git a/test/Transforms/InstSimplify/bitreverse.ll b/test/Transforms/InstSimplify/bitreverse.ll
new file mode 100644
index 000000000000..d87b68831fe5
--- /dev/null
+++ b/test/Transforms/InstSimplify/bitreverse.ll
@@ -0,0 +1,31 @@
+; RUN: opt < %s -S -instsimplify | FileCheck %s
+
+declare i32 @llvm.bitreverse.i32(i32)
+
+; CHECK-LABEL: @test1(
+; CHECK: ret i1 false
+define i1 @test1(i32 %arg) {
+  %a = or i32 %arg, 1
+  %b = call i32 @llvm.bitreverse.i32(i32 %a)
+  %res = icmp eq i32 %b, 0
+  ret i1 %res
+}
+
+; CHECK-LABEL: @test2(
+; CHECK: ret i1 false
+define i1 @test2(i32 %arg) {
+  %a = or i32 %arg, 1024
+  %b = call i32 @llvm.bitreverse.i32(i32 %a)
+  %res = icmp eq i32 %b, 0
+  ret i1 %res
+}
+
+; CHECK-LABEL: @test3(
+; CHECK: ret i1 false
+define i1 @test3(i32 %arg) {
+  %a = and i32 %arg, 1
+  %b = call i32 @llvm.bitreverse.i32(i32 %a)
+  %and = and i32 %b, 1
+  %res = icmp eq i32 %and, 1
+  ret i1 %res
+}