X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FTarget%2FPowerPC%2FPPCCTRLoops.cpp;h=58ccb4a4cdcb084ec915a3ca2ef43c8ce7d94ee5;hp=a9687adfd379bb0ac95d8ff153b3b4e6cec77a2a;hb=b93a3a175715cc408c0567310bde80cbf54bb389;hpb=75c3afbe05d88b759010d0740bb17af0209c3287

diff --git a/lib/Target/PowerPC/PPCCTRLoops.cpp b/lib/Target/PowerPC/PPCCTRLoops.cpp
index a9687adfd37..58ccb4a4cdc 100644
--- a/lib/Target/PowerPC/PPCCTRLoops.cpp
+++ b/lib/Target/PowerPC/PPCCTRLoops.cpp
@@ -197,10 +197,18 @@ static bool isLargeIntegerTy(bool Is32Bit, Type *Ty) {
 // Determining the address of a TLS variable results in a function call in
 // certain TLS models.
 static bool memAddrUsesCTR(const PPCTargetMachine *TM,
-                           const llvm::Value *MemAddr) {
+                           const Value *MemAddr) {
   const auto *GV = dyn_cast<GlobalValue>(MemAddr);
-  if (!GV)
+  if (!GV) {
+    // Recurse to check for constants that refer to TLS global variables.
+    if (const auto *CV = dyn_cast<Constant>(MemAddr))
+      for (const auto &CO : CV->operands())
+        if (memAddrUsesCTR(TM, CO))
+          return true;
+
     return false;
+  }
+
   if (!GV->isThreadLocal())
     return false;
   if (!TM)