[ARM] Add a test case for disabled neon/fpu features.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192440 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/ARM/no-fpu.ll b/test/CodeGen/ARM/no-fpu.ll
new file mode 100644 (file)
index 0000000..fff4bcc
--- /dev/null
+++ b/test/CodeGen/ARM/no-fpu.ll
@@ -0,0 +1,33 @@
+; RUN: llc < %s -mtriple=armv7-none-gnueabi -mattr=-neon,-vfp2 | FileCheck --check-prefix=NONEON-NOVFP %s
+; RUN: llc < %s -mtriple=armv7-none-gnueabi -mattr=-neon | FileCheck --check-prefix=NONEON %s
+; RUN: llc < %s -mtriple=armv7-none-gnueabi -mattr=-vfp2 | FileCheck --check-prefix=NOVFP %s
+; RUN: llc < %s -mtriple=armv7-none-gnueabi -mattr=-neon,+vfp2 | FileCheck --check-prefix=NONEON-VFP %s
+
+; Check no NEON instructions are selected when feature is disabled.
+define void @neonop(i64* nocapture readonly %a, i64* nocapture %b) #0 {
+  %1 = bitcast i64* %a to <2 x i64>*
+  %wide.load = load <2 x i64>* %1, align 8
+  ; NONEON-NOVFP-NOT: vld1.64
+  ; NONEON-NOT: vld1.64
+  %add = add <2 x i64> %wide.load, %wide.load
+  ; NONEON-NOVFP-NOT: vadd.i64
+  ; NONEON-NOT: vadd.i64
+  %2 = bitcast i64* %b to <2 x i64>*
+  store <2 x i64> %add, <2 x i64>* %2, align 8
+  ; NONEON-NOVFP-NOT: vst1.64
+  ; NONEON-NOT: vst1.64
+  ret void
+}
+
+; Likewise with VFP instructions.
+define double @fpmult(double %a, double %b) {
+  %res = fmul double %a, %b
+  ; NONEON-NOVFP-NOT: vmov
+  ; NONEON-NOVFP-NOT: vmul.f64
+  ; NOVFP-NOT: vmov
+  ; NOVFP-NOT: vmul.f64
+  ; NONEON-VFP: vmov
+  ; NONEON-VFP: vmul.f64
+  ret double %res
+}
+