r200233 - Cortex-M3 and Cortex-M4 should not enable hwdiv-arm

[Artyom Skrobov]

Author: askrobov
Date: Mon Jan 27 12:44:25 2014
New Revision: 200233

URL: http://llvm.org/viewvc/llvm-project?rev=200233&view=rev
Log:
Cortex-M3 and Cortex-M4 should not enable hwdiv-arm

Modified:
    cfe/trunk/lib/Basic/Targets.cpp
    cfe/trunk/test/Driver/arm-cortex-cpus.c

Modified: cfe/trunk/lib/Basic/Targets.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets.cpp?rev=200233&r1=200232&r2=200233&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/Targets.cpp (original)
+++ cfe/trunk/lib/Basic/Targets.cpp Mon Jan 27 12:44:25 2014
@@ -3832,14 +3832,15 @@ public:
       Features["hwdiv"] = true;
       Features["hwdiv-arm"] = true;
       Features["crc"] = true;
-    } else if (CPU == "cortex-r5" || CPU == "cortex-m3" ||
-               CPU == "cortex-m4" ||
+    } else if (CPU == "cortex-r5" ||
                // Enable the hwdiv extension for all v8a AArch32 cores by
                // default.
                ArchName == "armv8a" || ArchName == "armv8" ||
                ArchName == "thumbv8a" || ArchName == "thumbv8") {
       Features["hwdiv"] = true;
       Features["hwdiv-arm"] = true;
+    } else if (CPU == "cortex-m3" || CPU == "cortex-m4") {
+      Features["hwdiv"] = true;
     }
   }
 

Modified: cfe/trunk/test/Driver/arm-cortex-cpus.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/arm-cortex-cpus.c?rev=200233&r1=200232&r2=200233&view=diff
==============================================================================
--- cfe/trunk/test/Driver/arm-cortex-cpus.c (original)
+++ cfe/trunk/test/Driver/arm-cortex-cpus.c Mon Jan 27 12:44:25 2014
@@ -158,3 +158,9 @@
 // RUN: %clang -target arm -mcpu=cortex-a53 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A-THUMB %s
 // RUN: %clang -target arm -mcpu=cortex-a57 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A-THUMB %s
 // CHECK-CPUV8A-THUMB: "-cc1"{{.*}} "-triple" "thumbv8-{{.*}}
+
+// ================== Check that Cortex-M cores don't enable hwdiv-arm (and don't emit Tag_DIV_use)
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m3 -S %s -o - | FileCheck -check-prefix=CHECK-HWDIV-ARM %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m4 -S %s -o - | FileCheck -check-prefix=CHECK-HWDIV-ARM %s
+// CHECK-HWDIV-ARM-NOT: .eabi_attribute	44
+