Match (fneg (fma) to vfnma. rdar://10139676
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154469 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMInstrVFP.td b/lib/Target/ARM/ARMInstrVFP.td
index a9ad4fa..1b0d587 100644
--- a/lib/Target/ARM/ARMInstrVFP.td
+++ b/lib/Target/ARM/ARMInstrVFP.td
@@ -1140,6 +1140,14 @@
(VFNMAS SPR:$dstin, SPR:$a, SPR:$b)>,
Requires<[HasVFP4,DontUseNEONForFP,FPContractions]>;
+// Match @llvm.fma.* intrinsics
+def : Pat<(fneg (fma (f64 DPR:$Ddin), (f64 DPR:$Dn), (f64 DPR:$Dm))),
+ (VFNMAD DPR:$Ddin, DPR:$Dn, DPR:$Dm)>,
+ Requires<[HasVFP4]>;
+def : Pat<(fneg (fma (f32 SPR:$Sdin), (f32 SPR:$Sn), (f32 SPR:$Sm))),
+ (VFNMAS SPR:$Sdin, SPR:$Sn, SPR:$Sm)>,
+ Requires<[HasVFP4]>;
+
def VFNMSD : ADbI<0b11101, 0b01, 0, 0,
(outs DPR:$Dd), (ins DPR:$Ddin, DPR:$Dn, DPR:$Dm),
IIC_fpFMAC64, "vfnms", ".f64\t$Dd, $Dn, $Dm",
diff --git a/test/CodeGen/ARM/fusedMAC.ll b/test/CodeGen/ARM/fusedMAC.ll
index 381eb43..b5398c7 100644
--- a/test/CodeGen/ARM/fusedMAC.ll
+++ b/test/CodeGen/ARM/fusedMAC.ll
@@ -99,30 +99,49 @@
ret <4 x float> %sub
}
-define float @test_f32(float %a, float %b, float %c) nounwind readnone ssp {
+define float @test_fma_f32(float %a, float %b, float %c) nounwind readnone ssp {
entry:
-; CHECK: test_f32
+; CHECK: test_fma_f32
; CHECK: vfma.f32
%call = tail call float @llvm.fma.f32(float %a, float %b, float %c) nounwind readnone
ret float %call
}
-define double @test_f64(double %a, double %b, double %c) nounwind readnone ssp {
+define double @test_fma_f64(double %a, double %b, double %c) nounwind readnone ssp {
entry:
-; CHECK: test_f64
+; CHECK: test_fma_f64
; CHECK: vfma.f64
%call = tail call double @llvm.fma.f64(double %a, double %b, double %c) nounwind readnone
ret double %call
}
-define <2 x float> @test_v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c) nounwind readnone ssp {
+define <2 x float> @test_fma_v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c) nounwind readnone ssp {
entry:
-; CHECK: test_v2f32
+; CHECK: test_fma_v2f32
; CHECK: vfma.f32
%0 = tail call <2 x float> @llvm.fma.v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c) nounwind
ret <2 x float> %0
}
+define float @test_fnma_f32(float %a, float %b, float %c) nounwind readnone ssp {
+entry:
+; CHECK: test_fnma_f32
+; CHECK: vfnma.f32
+ %call = tail call float @llvm.fma.f32(float %a, float %b, float %c) nounwind readnone
+ %tmp1 = fsub float -0.0, %call
+ %tmp2 = fsub float %tmp1, %c
+ ret float %tmp2
+}
+
+define double @test_fnma_f64(double %a, double %b, double %c) nounwind readnone ssp {
+entry:
+; CHECK: test_fnma_f64
+; CHECK: vfnma.f64
+ %call = tail call double @llvm.fma.f64(double %a, double %b, double %c) nounwind readnone
+ %tmp = fsub double -0.0, %call
+ ret double %tmp
+}
+
declare float @llvm.fma.f32(float, float, float) nounwind readnone
declare double @llvm.fma.f64(double, double, double) nounwind readnone
declare <2 x float> @llvm.fma.v2f32(<2 x float>, <2 x float>, <2 x float>) nounwind readnone