ARM: disable emission of __XYZvfp in soft-float environment.

The point of these calls is to allow Thumb-1 code to make use of the VFP unit
to perform its operations. This is not desirable with -msoft-float, since most
of the reasons you'd want that apply equally to the runtime library.

rdar://problem/13766161

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206874 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 2a68a671fb811bf3c94118b49f0265af7bfd23a0..0a64d991c06766b9d493116c5beb9ee28f6d23a3 100644 (file)
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -172,7 +172,7 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
   if (Subtarget->isTargetMachO()) {
     // Uses VFP for Thumb libfuncs if available.
     if (Subtarget->isThumb() && Subtarget->hasVFP2() &&
-        Subtarget->hasARMOps()) {
+        Subtarget->hasARMOps() && !TM.Options.UseSoftFloat) {
       // Single-precision floating-point arithmetic.
       setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
       setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");

diff --git a/test/CodeGen/ARM/vfp-libcalls.ll b/test/CodeGen/ARM/vfp-libcalls.ll
new file mode 100644 (file)
index 0000000..9d4e194
--- /dev/null
+++ b/test/CodeGen/ARM/vfp-libcalls.ll
@@ -0,0 +1,11 @@
+; RUN: llc -mtriple=armv6-apple-ios -mcpu=arm1136jf-s -o - %s | FileCheck %s --check-prefix=CHECK-HARD
+; RUN: llc -mtriple=thumbv6-apple-ios -mcpu=arm1136jf-s -o - %s | FileCheck %s --check-prefix=CHECK-SOFTISH
+; RUN: llc -mtriple=armv7s-apple-ios -soft-float -mcpu=arm1136jf-s -o - %s | FileCheck %s --check-prefix=CHECK-SOFT
+
+define float @test_call(float %a, float %b) {
+; CHECK-HARD: vadd.f32 {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
+; CHECK-SOFTISH: blx ___addsf3vfp
+; CHECK-SOFT: bl ___addsf3{{$}}
+  %sum = fadd float %a, %b
+  ret float %sum
+}
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