[llvm-commits] [llvm] r158902 - in /llvm/trunk: lib/Target/ARM/ARMInstrVFP.td test/CodeGen/ARM/fusedMAC.ll

[Lang Hames]

Author: lhames
Date: Thu Jun 21 01:10:00 2012
New Revision: 158902

URL: http://llvm.org/viewvc/llvm-project?rev=158902&view=rev
Log:
Add a missing llvm.fma -> VFNMS pattern to the ARM backend.

Modified:
    llvm/trunk/lib/Target/ARM/ARMInstrVFP.td
    llvm/trunk/test/CodeGen/ARM/fusedMAC.ll

Modified: llvm/trunk/lib/Target/ARM/ARMInstrVFP.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrVFP.td?rev=158902&r1=158901&r2=158902&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrVFP.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrVFP.td Thu Jun 21 01:10:00 2012
@@ -1207,6 +1207,14 @@
           Requires<[HasVFP4,DontUseNEONForFP,UseFusedMAC]>;
 
 // Match @llvm.fma.* intrinsics
+
+// (fma x, y, (fneg z)) -> (vfnms z, x, y))
+def : Pat<(f64 (fma DPR:$Dn, DPR:$Dm, (fneg DPR:$Ddin))),
+          (VFNMSD DPR:$Ddin, DPR:$Dn, DPR:$Dm)>,
+      Requires<[HasVFP4]>;
+def : Pat<(f32 (fma SPR:$Sn, SPR:$Sm, (fneg SPR:$Sdin))),
+          (VFNMSS SPR:$Sdin, SPR:$Sn, SPR:$Sm)>,
+      Requires<[HasVFP4]>;
 // (fneg (fma (fneg x), y, z)) -> (vfnms z, x, y)
 def : Pat<(fneg (f64 (fma (fneg DPR:$Dn), DPR:$Dm, DPR:$Ddin))),
           (VFNMSD DPR:$Ddin, DPR:$Dn, DPR:$Dm)>,

Modified: llvm/trunk/test/CodeGen/ARM/fusedMAC.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/ARM/fusedMAC.ll?rev=158902&r1=158901&r2=158902&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/ARM/fusedMAC.ll (original)
+++ llvm/trunk/test/CodeGen/ARM/fusedMAC.ll Thu Jun 21 01:10:00 2012
@@ -141,6 +141,15 @@
   ret double %tmp2
 }
 
+define float @test_fnms_f32(float %a, float %b, float* %c) nounwind readnone ssp {
+; CHECK: test_fnms_f32
+; CHECK: vfnms.f32
+  %tmp1 = load float* %c, align 4
+  %tmp2 = fsub float -0.0, %tmp1
+  %tmp3 = tail call float @llvm.fma.f32(float %a, float %b, float %tmp2) nounwind readnone
+  ret float %tmp3 
+}
+
 define double @test_fnms_f64(double %a, double %b, double %c) nounwind readnone ssp {
 entry:
 ; CHECK: test_fnms_f64