[PATCH] D12244: Implement ACLE 2.0 macros of chapters 6.4 and 6.5 for [ARM] and [Aarch64] targets

[Alexandros Lamprineas via cfe-commits]

labrinea added inline comments.

================
Comment at: lib/Basic/Targets.cpp:4790
@@ +4789,3 @@
+      Builder.defineMacro("__ARM_FEATURE_SAT", "1");
+      Builder.defineMacro("__ARM_FEATURE_QBIT", "1");
+    }
----------------
rengolin wrote:
> Isn't there a combination where you'll emit this macro twice?
This could be addressed as:

```
bool hasDSP = false;
if (is5EOrAbove && is32Bit && (CPUProfile != "M" || CPUAttr  == "7EM")) {
  Builder.defineMacro("__ARM_FEATURE_DSP", "1");
  hasDSP = true;
}

bool hasSAT = false;
if ((ArchVersion == 6 && CPUProfile != "M") || ArchVersion > 6 ) {
  Builder.defineMacro("__ARM_FEATURE_SAT", "1");
  hasSAT = true;
}

if (hasDSP || hasSAT)
  Builder.defineMacro("__ARM_FEATURE_QBIT", "1");
```


http://reviews.llvm.org/D12244