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ARM: FMA is legal only if VFP4 is available.

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rdar://13306723

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176212 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2013-02-27 21:31:12 +00:00
parent 0a4da9c6a1
commit b302a4e6b5
2 changed files with 37 additions and 0 deletions
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6
lib/Target/ARM/ARMISelLowering.cpp
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@ -554,6 +554,12 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
setOperationAction(ISD::CTPOP, MVT::v4i16, Custom);
setOperationAction(ISD::CTPOP, MVT::v8i16, Custom);
// NEON only has FMA instructions as of VFP4.
if (!Subtarget->hasVFP4()) {
setOperationAction(ISD::FMA, MVT::v2f32, Expand);
setOperationAction(ISD::FMA, MVT::v4f32, Expand);
}
setTargetDAGCombine(ISD::INTRINSIC_VOID);
setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);

31
test/CodeGen/ARM/2013-02-27-expand-vfma.ll Normal file
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@ -0,0 +1,31 @@
; RUN: llc < %s -mtriple=armv7-apple-darwin | FileCheck %s
; RUN: llc < %s -mtriple=armv7s-apple-darwin | FileCheck %s -check-prefix=VFP4
define <4 x float> @muladd(<4 x float> %a, <4 x float> %b, <4 x float> %c) nounwind {
; CHECK: muladd:
; CHECK: fmaf
; CHECK: fmaf
; CHECK: fmaf
; CHECK: fmaf
; CHECK-NOT: fmaf
; CHECK-VFP4: vfma.f32
%tmp = tail call <4 x float> @llvm.fma.v4f32(<4 x float> %b, <4 x float> %c, <4 x float> %a) #2
ret <4 x float> %tmp
}
declare <4 x float> @llvm.fma.v4f32(<4 x float>, <4 x float>, <4 x float>) #1
define <2 x float> @muladd2(<2 x float> %a, <2 x float> %b, <2 x float> %c) nounwind {
; CHECK: muladd2:
; CHECK: fmaf
; CHECK: fmaf
; CHECK-NOT: fmaf
; CHECK-VFP4: vfma.f32
%tmp = tail call <2 x float> @llvm.fma.v2f32(<2 x float> %b, <2 x float> %c, <2 x float> %a) #2
ret <2 x float> %tmp
}
declare <2 x float> @llvm.fma.v2f32(<2 x float>, <2 x float>, <2 x float>) #1