1 files changed, 13 insertions, 0 deletions
diff --git a/clang/lib/Basic/Targets/SystemZ.cpp b/clang/lib/Basic/Targets/SystemZ.cpp
index 13b8623..30f846c 100644
--- a/clang/lib/Basic/Targets/SystemZ.cpp
+++ b/clang/lib/Basic/Targets/SystemZ.cpp
@@ -99,6 +99,16 @@ bool SystemZTargetInfo::validateAsmConstraint(
   case 'T': // Likewise, plus an index
     Info.setAllowsMemory();
     return true;
+  case '@':
+    // CC condition changes.
+    if (StringRef(Name) == "@cc") {
+      Name += 2;
+      Info.setAllowsRegister();
+      // SystemZ has 2-bits CC, and hence Interval [0, 4).
+      Info.setOutputOperandBounds(0, 4);
+      return true;
+    }
+    return false;
   }
 }
 
@@ -161,6 +171,9 @@ unsigned SystemZTargetInfo::getMinGlobalAlign(uint64_t Size,
 
 void SystemZTargetInfo::getTargetDefines(const LangOptions &Opts,
                                          MacroBuilder &Builder) const {
+  // Inline assembly supports SystemZ flag outputs.
+  Builder.defineMacro("__GCC_ASM_FLAG_OUTPUTS__");
+
   Builder.defineMacro("__s390__");
   Builder.defineMacro("__s390x__");
   Builder.defineMacro("__zarch__");