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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

llvm-svn: 206874
This commit is contained in:
Tim Northover 2014-04-22 10:10:09 +00:00
parent c636d15284
commit 978d25f391
2 changed files with 12 additions and 1 deletions
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2
llvm/lib/Target/ARM/ARMISelLowering.cpp
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@ -172,7 +172,7 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
if (Subtarget->isTargetMachO()) { if (Subtarget->isTargetMachO()) {
// Uses VFP for Thumb libfuncs if available. // Uses VFP for Thumb libfuncs if available.
if (Subtarget->isThumb() && Subtarget->hasVFP2() && if (Subtarget->isThumb() && Subtarget->hasVFP2() &&
Subtarget->hasARMOps()) { Subtarget->hasARMOps() && !TM.Options.UseSoftFloat) {
// Single-precision floating-point arithmetic. // Single-precision floating-point arithmetic.
setLibcallName(RTLIB::ADD_F32, "__addsf3vfp"); setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
setLibcallName(RTLIB::SUB_F32, "__subsf3vfp"); setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");

11
llvm/test/CodeGen/ARM/vfp-libcalls.ll Normal file
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@ -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
}