Print out the variable declaration only if it is a declaration. Otherwise, a

'static' variable will be emitted twice.
PR10081


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137134 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 12 insertions, 1 deletions

diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index 5b9a0a2..e4ecb9e 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -1817,7 +1817,7 @@ bool CWriter::doInitialization(Module &M) {
     Out << "\n\n/* Global Variable Declarations */\n";
     for (Module::global_iterator I = M.global_begin(), E = M.global_end();
          I != E; ++I)
-      if (!I->isDeclaration()) {
+      if (I->isDeclaration()) {
         // Ignore special globals, such as debug info.
         if (getGlobalVariableClass(I))
           continue;
diff --git a/test/CodeGen/CBackend/pr10081.ll b/test/CodeGen/CBackend/pr10081.ll
new file mode 100644
index 0000000..723bf5c
--- /dev/null
+++ b/test/CodeGen/CBackend/pr10081.ll
@@ -0,0 +1,11 @@
+; RUN: llc < %s -march=c | grep {static float _ZL3foo} | count 1
+; PR10081
+
+@_ZL3foo = internal global float 0.000000e+00, align 4
+
+define float @_Z3barv() nounwind ssp {
+  %1 = load float* @_ZL3foo, align 4
+  %2 = fadd float %1, 1.000000e+00
+  store float %2, float* @_ZL3foo, align 4
+  ret float %1
+}