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-rw-r--r--test/CodeGen/AArch64/extern-weak.ll35
1 files changed, 35 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/extern-weak.ll b/test/CodeGen/AArch64/extern-weak.ll
new file mode 100644
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--- /dev/null
+++ b/test/CodeGen/AArch64/extern-weak.ll
@@ -0,0 +1,35 @@
+; RUN: llc -mtriple=aarch64-none-linux-gnu -o - < %s | FileCheck %s
+
+declare extern_weak i32 @var()
+
+define i32()* @foo() {
+; The usual ADRP/ADD pair can't be used for a weak reference because it must
+; evaluate to 0 if the symbol is undefined. We use a litpool entry.
+ ret i32()* @var
+; CHECK: .LCPI0_0:
+; CHECK-NEXT: .xword var
+
+; CHECK: ldr x0, [{{x[0-9]+}}, #:lo12:.LCPI0_0]
+
+}
+
+
+@arr_var = extern_weak global [10 x i32]
+
+define i32* @bar() {
+ %addr = getelementptr [10 x i32]* @arr_var, i32 0, i32 5
+; CHECK: .LCPI1_0:
+; CHECK-NEXT: .xword arr_var
+
+; CHECK: ldr [[BASE:x[0-9]+]], [{{x[0-9]+}}, #:lo12:.LCPI1_0]
+; CHECK: add x0, [[BASE]], #20
+ ret i32* %addr
+}
+
+@defined_weak_var = internal unnamed_addr global i32 0
+
+define i32* @wibble() {
+ ret i32* @defined_weak_var
+; CHECK: adrp [[BASE:x[0-9]+]], defined_weak_var
+; CHECK: add x0, [[BASE]], #:lo12:defined_weak_var
+} \ No newline at end of file
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