1 files changed, 51 insertions, 0 deletions
diff --git a/test/CodeGen/X86/switch-bt.ll b/test/CodeGen/X86/switch-bt.ll
new file mode 100644
index 0000000..ed3266e
--- /dev/null
+++ b/test/CodeGen/X86/switch-bt.ll
@@ -0,0 +1,51 @@
+; RUN: llc -march=x86-64 -asm-verbose=false < %s | FileCheck %s
+
+; This switch should use bit tests, and the third bit test case is just
+; testing for one possible value, so it doesn't need a bt.
+
+;      CHECK: movabsq $2305843009482129440, %r
+; CHECK-NEXT: btq %rax, %r
+; CHECK-NEXT: jb
+; CHECK-NEXT: movl  $671088640, %e
+; CHECK-NEXT: btq %rax, %r
+; CHECK-NEXT: jb
+; CHECK-NEXT: testq %rax, %r
+; CHECK-NEXT: j
+
+define void @test(i8* %l) nounwind {
+entry:
+  %l.addr = alloca i8*, align 8                   ; <i8**> [#uses=2]
+  store i8* %l, i8** %l.addr
+  %tmp = load i8** %l.addr                        ; <i8*> [#uses=1]
+  %tmp1 = load i8* %tmp                           ; <i8> [#uses=1]
+  %conv = sext i8 %tmp1 to i32                    ; <i32> [#uses=1]
+  switch i32 %conv, label %sw.default [
+    i32 62, label %sw.bb
+    i32 60, label %sw.bb
+    i32 38, label %sw.bb2
+    i32 94, label %sw.bb2
+    i32 61, label %sw.bb2
+    i32 33, label %sw.bb4
+  ]
+
+sw.bb:                                            ; preds = %entry, %entry
+  call void @foo(i32 0)
+  br label %sw.epilog
+
+sw.bb2:                                           ; preds = %entry, %entry, %entry
+  call void @foo(i32 1)
+  br label %sw.epilog
+
+sw.bb4:                                           ; preds = %entry
+  call void @foo(i32 3)
+  br label %sw.epilog
+
+sw.default:                                       ; preds = %entry
+  call void @foo(i32 97)
+  br label %sw.epilog
+
+sw.epilog:                                        ; preds = %sw.default, %sw.bb4, %sw.bb2, %sw.bb
+  ret void
+}
+
+declare void @foo(i32)