mips-force-nomadd4

The MIPS port aims to support the Loongson 3 family of CPUs in addition
of the other MIPS CPUs. On the Loongson 3 family the MADD4 instructions
are fused, while they are not fused on the other MIPS CPUs. In order to
support both, we have to disabled those instructions.

For that, the patch below basically corresponds to the --with-madd4=no
used on the GCC side.

Gbp-Pq: Topic mips
Gbp-Pq: Name mips-force-nomadd4.patch

diff --git a/clang/lib/Basic/Targets/Mips.h b/clang/lib/Basic/Targets/Mips.h
index 9e84dbc386ed0f59f023c4887daebb0b671c5d95..c5184625151f769da9ddbb927c0ce081b1676e3a 100644 (file)
--- a/clang/lib/Basic/Targets/Mips.h
+++ b/clang/lib/Basic/Targets/Mips.h
@@ -331,6 +331,8 @@ public:
         HasMSA = true;
       else if (Feature == "+nomadd4")
         DisableMadd4 = true;
+      else if (Feature == "-nomadd4")
+        DisableMadd4 = false;
       else if (Feature == "+fp64")
         FPMode = FP64;
       else if (Feature == "-fp64")