Testcase for PR2137

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48258 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/2008-03-12-ThreadLocalAlias.ll b/test/CodeGen/X86/2008-03-12-ThreadLocalAlias.ll
new file mode 100644 (file)
index 0000000..0f83b39
--- /dev/null
+++ b/test/CodeGen/X86/2008-03-12-ThreadLocalAlias.ll
@@ -0,0 +1,37 @@
+; RUN: llvm-as < %s | llc -relocation-model=pic | grep TLSGD | count 2
+; PR2137
+
+; ModuleID = '1.c'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
+target triple = "i386-pc-linux-gnu"
+       %struct.__res_state = type { i32 }
+@__resp = thread_local global %struct.__res_state* @_res               ; <%struct.__res_state**> [#uses=1]
+@_res = global %struct.__res_state zeroinitializer, section ".bss"             ; <%struct.__res_state*> [#uses=1]
+
+@__libc_resp = hidden alias %struct.__res_state** @__resp              ; <%struct.__res_state**> [#uses=2]
+
+define i32 @foo() {
+entry:
+       %retval = alloca i32            ; <i32*> [#uses=1]
+       %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+       %tmp = load %struct.__res_state** @__libc_resp, align 4         ; <%struct.__res_state*> [#uses=1]
+       %tmp1 = getelementptr %struct.__res_state* %tmp, i32 0, i32 0           ; <i32*> [#uses=1]
+       store i32 0, i32* %tmp1, align 4
+       br label %return
+return:                ; preds = %entry
+       %retval2 = load i32* %retval            ; <i32> [#uses=1]
+       ret i32 %retval2
+}
+
+define i32 @bar() {
+entry:
+       %retval = alloca i32            ; <i32*> [#uses=1]
+       %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+       %tmp = load %struct.__res_state** @__libc_resp, align 4         ; <%struct.__res_state*> [#uses=1]
+       %tmp1 = getelementptr %struct.__res_state* %tmp, i32 0, i32 0           ; <i32*> [#uses=1]
+       store i32 1, i32* %tmp1, align 4
+       br label %return
+return:                ; preds = %entry
+       %retval2 = load i32* %retval            ; <i32> [#uses=1]
+       ret i32 %retval2
+}