[PATCH] [ARM] Implement eabi_attribute, cpu, and fpu directives.

[Logan Chien]

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Comment at: lib/Target/ARM/ARM.td:324
@@ -323,2 +323,3 @@
                                      FeatureT2XtPk, FeatureVFP4,
-                                     FeatureVFPOnlySP, FeatureMClass]>;
+                                     FeatureVFPOnlySP, FeatureD16,
+                                     FeatureMClass]>;
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According to ARMv7-M Reference Manual, the ARM floating point extension for ARMv7-M is named as FPV4-SP, which is a single precision only variant of VFPv4-d16.  Thus, I think we should add FeatureD16 to this subtarget.

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Comment at: lib/Target/ARM/ARM.td:312
@@ -311,3 +311,3 @@
                                      FeatureHasRAS, FeatureVFPOnlySP,
-                                     FeatureRClass]>;
+                                     FeatureD16, FeatureRClass]>;
 
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For not breaking the existing test cases, I have to add FeatureD16 to cortex-r5 subtarget.  Although this is the default behavior of GCC, however, I can't find any document stating cortex-r5 has only d0-d15.  Should I change the test case instead?


http://llvm-reviews.chandlerc.com/D1987