vendor/llvm/llvm-release_350-r216957

1 files changed, 33 insertions, 0 deletions

diff --git a/test/CodeGen/X86/jump_table_alias.ll b/test/CodeGen/X86/jump_table_alias.ll
new file mode 100644
index 000000000000..f3691fda221e
--- /dev/null
+++ b/test/CodeGen/X86/jump_table_alias.ll
@@ -0,0 +1,33 @@
+; RUN: llc <%s -jump-table-type=single | FileCheck %s
+target triple = "x86_64-unknown-linux-gnu"
+define i32 @f() unnamed_addr jumptable {
+entry:
+  ret i32 0
+}
+
+@i = alias internal i32 ()* @f
+@j = alias i32 ()* @f
+
+define i32 @main(i32 %argc, i8** %argv) {
+  %temp = alloca i32 ()*, align 8
+  store i32 ()* @i, i32()** %temp, align 8
+; CHECK: movq    $__llvm_jump_instr_table_0_1
+  %1 = load i32 ()** %temp, align 8
+; CHECK: movl    $__llvm_jump_instr_table_0_1
+  %2 = call i32 ()* %1()
+  %3 = call i32 ()* @i()
+; CHECK: callq   i
+  %4 = call i32 ()* @j()
+; CHECK: callq   j
+  ret i32 %3
+}
+
+; There should only be one table, even though there are two GlobalAliases,
+; because they both alias the same value.
+
+; CHECK:         .globl  __llvm_jump_instr_table_0_1
+; CHECK:         .align  8, 0x90
+; CHECK:         .type   __llvm_jump_instr_table_0_1,@function
+; CHECK: __llvm_jump_instr_table_0_1:
+; CHECK:         jmp     f@PLT
+