PNaCl: Fix ExpandTls to handle GlobalAliases of thread-local variables

Expand out these aliases in the ExpandTlsConstantExpr pass.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3347
TEST=test/Transforms/NaCl/expand-tls-constexpr-alias.ll

Review URL: https://codereview.chromium.org/12989011

1 files changed, 28 insertions, 0 deletions

diff --git a/test/Transforms/NaCl/expand-tls-constexpr-alias.ll b/test/Transforms/NaCl/expand-tls-constexpr-alias.ll
new file mode 100644
index 0000000000..65daa5eacd
--- /dev/null
+++ b/test/Transforms/NaCl/expand-tls-constexpr-alias.ll
@@ -0,0 +1,28 @@
+; RUN: opt < %s -nacl-expand-tls-constant-expr -S | FileCheck %s
+
+@real_tvar = thread_local global i32 123
+@tvar_alias = alias i32* @real_tvar
+@tvar_alias2 = alias i32* getelementptr (i32* @real_tvar, i32 100)
+
+
+define i32* @get_tvar() {
+  ret i32* @tvar_alias
+}
+; CHECK: define i32* @get_tvar()
+; CHECK: ret i32* @real_tvar
+
+
+define i32* @get_tvar2() {
+  ret i32* @tvar_alias2
+}
+; CHECK: define i32* @get_tvar2()
+; CHECK: %expanded = getelementptr i32* @real_tvar, i32 100
+; CHECK: ret i32* %expanded
+
+
+define i32* @get_tvar3() {
+  ret i32* getelementptr (i32* @tvar_alias2, i32 100)
+}
+; CHECK: define i32* @get_tvar3()
+; CHECK: %expanded = getelementptr i32* @real_tvar, i32 200
+; CHECK: ret i32* %expanded