rengolin added a reviewer: rengolin.
================
Comment at: lib/Basic/Targets.cpp:4931
@@ -4931,1 +4930,3 @@
+ if (ArchVersion >= 7 && (CPUProfile != "M" || CPUAttr == "7EM") &&
+ (FPU & VFP4FPU))
Builder.defineMacro("__ARM_FEATURE_FMA", "1");
----------------
I think just two checks are necessary, here:
(FPU & VFPV4FPU) || (ArchVersion > 7)
and make sure that the right FPU flag is set from the right cores, plus "+vfp4".
================
Comment at: test/CodeGen/arm-neon-fma.c:6
@@ -5,2 +5,3 @@
// RUN: -ffreestanding \
+// RUN: -target-feature +vfp4 \
// RUN: -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s
----------------
why not change the cpu to a core that has vfp4?
I know the test is about FMA, not the CPU, but this is a combination that will
never occur in the wild...
================
Comment at: test/Sema/arm_vfma.c:1
@@ -1,2 +1,2 @@
-// RUN: %clang_cc1 -triple thumbv7s-apple-ios7.0 -target-feature +neon
-fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple thumbv7s-apple-ios7.0 -target-feature +neon
-target-feature +vfp4 -fsyntax-only -verify %s
#include <arm_neon.h>
----------------
It's possible that v7 Apple cores always have FMA? I'd make sure of that before
forcing the flag here. We don't want to disable it inadvertently.
@t.p.northover, can you confirm Apple's support for VFP4?
http://reviews.llvm.org/D18963
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