commit c4a04010f676ce9ff0049b0fc5d1f96a2dbe81be
author Tim Northover <Tim.Northover@arm.com> Wed Jan 16 20:13:15 2013 +0000
committer Tim Northover <Tim.Northover@arm.com> Wed Jan 16 20:13:15 2013 +0000
tree 5c02580b16f5f3f49ffb9f7a5bbffae7f7dcc807
parent 214ea9de659f4bfb3cf45ec361cf8be35bc0218d

Correct order of operands forwarding NEON vfma to LLVM fma

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172650 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGBuiltin.cpp

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 48ed65e..6678ebe 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -2132,7 +2132,9 @@
     Ops[0] = Builder.CreateBitCast(Ops[0], Ty);
     Ops[1] = Builder.CreateBitCast(Ops[1], Ty);
     Ops[2] = Builder.CreateBitCast(Ops[2], Ty);
-    return Builder.CreateCall3(F, Ops[0], Ops[1], Ops[2]);
+
+    // NEON intrinsic puts accumulator first, unlike the LLVM fma.
+    return Builder.CreateCall3(F, Ops[1], Ops[2], Ops[0]);
   }
   case ARM::BI__builtin_neon_vpadal_v:
   case ARM::BI__builtin_neon_vpadalq_v: {