vendor/llvm/llvm-release_39-r276489

1 files changed, 44 insertions, 0 deletions

diff --git a/test/CodeGen/AArch64/bswap-known-bits.ll b/test/CodeGen/AArch64/bswap-known-bits.ll
new file mode 100644
index 000000000000..e5de7953d1b8
--- /dev/null
+++ b/test/CodeGen/AArch64/bswap-known-bits.ll
@@ -0,0 +1,44 @@
+; RUN: llc < %s -mtriple=aarch64-apple-darwin  | FileCheck %s
+
+declare i16 @llvm.bswap.i16(i16)
+declare i32 @llvm.bswap.i32(i32)
+
+; CHECK-LABEL: @test1
+; CHECK: orr w0, wzr, #0x1
+define i1 @test1(i16 %arg) {
+  %a = or i16 %arg, 511
+  %b = call i16 @llvm.bswap.i16(i16 %a)
+  %and = and i16 %b, 256
+  %res = icmp eq i16 %and, 256
+  ret i1 %res
+}
+
+; CHECK-LABEL: @test2
+; CHECK: orr w0, wzr, #0x1
+define i1 @test2(i16 %arg) {
+  %a = or i16 %arg, 1
+  %b = call i16 @llvm.bswap.i16(i16 %a)
+  %and = and i16 %b, 256
+  %res = icmp eq i16 %and, 256
+  ret i1 %res
+}
+
+; CHECK-LABEL: @test3
+; CHECK: orr w0, wzr, #0x1
+define i1 @test3(i16 %arg) {
+  %a = or i16 %arg, 256
+  %b = call i16 @llvm.bswap.i16(i16 %a)
+  %and = and i16 %b, 1
+  %res = icmp eq i16 %and, 1
+  ret i1 %res
+}
+
+; CHECK-LABEL: @test4
+; CHECK: orr w0, wzr, #0x1
+define i1 @test4(i32 %arg) {
+  %a = or i32 %arg, 2147483647  ; i32_MAX
+  %b = call i32 @llvm.bswap.i32(i32 %a)
+  %and = and i32 %b, 127
+  %res = icmp eq i32 %and, 127
+  ret i1 %res
+}