Should just use xorps to clear XMM registers for all data types. pxor is also one...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28984 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index f4d3d0e..4a96c9e 100644 (file)
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -2109,15 +2109,9 @@ def MWAIT : I<0xC9, RawFrm, (ops), "mwait",
 
 // Alias instructions that map zero vector to pxor / xorp* for sse.
 // FIXME: remove when we can teach regalloc that xor reg, reg is ok.
-def V_SET0_PI : PDI<0xEF, MRMInitReg, (ops VR128:$dst),
-                    "pxor $dst, $dst",
-                    [(set VR128:$dst, (v2i64 immAllZerosV))]>;
-def V_SET0_PS : PSI<0x57, MRMInitReg, (ops VR128:$dst),
-                    "xorps $dst, $dst",
-                    [(set VR128:$dst, (v4f32 immAllZerosV))]>;
-def V_SET0_PD : PDI<0x57, MRMInitReg, (ops VR128:$dst),
-                    "xorps $dst, $dst",
-                    [(set VR128:$dst, (v2f64 immAllZerosV))]>;
+def V_SET0 : PSI<0x57, MRMInitReg, (ops VR128:$dst),
+                 "xorps $dst, $dst",
+                 [(set VR128:$dst, (v4f32 immAllZerosV))]>;
 
 def V_SETALLONES : PDI<0x76, MRMInitReg, (ops VR128:$dst),
                        "pcmpeqd $dst, $dst",
@@ -2265,9 +2259,11 @@ def : Pat<(v4i32 (undef)), (IMPLICIT_DEF_VR128)>, Requires<[HasSSE2]>;
 def : Pat<(v2i64 (undef)), (IMPLICIT_DEF_VR128)>, Requires<[HasSSE2]>;
 
 // 128-bit vector all zero's.
-def : Pat<(v16i8 immAllZerosV), (V_SET0_PI)>, Requires<[HasSSE2]>;
-def : Pat<(v8i16 immAllZerosV), (V_SET0_PI)>, Requires<[HasSSE2]>;
-def : Pat<(v4i32 immAllZerosV), (V_SET0_PI)>, Requires<[HasSSE2]>;
+def : Pat<(v16i8 immAllZerosV), (V_SET0)>, Requires<[HasSSE2]>;
+def : Pat<(v8i16 immAllZerosV), (V_SET0)>, Requires<[HasSSE2]>;
+def : Pat<(v4i32 immAllZerosV), (V_SET0)>, Requires<[HasSSE2]>;
+def : Pat<(v2i64 immAllZerosV), (V_SET0)>, Requires<[HasSSE2]>;
+def : Pat<(v2f64 immAllZerosV), (V_SET0)>, Requires<[HasSSE2]>;
 
 // 128-bit vector all one's.
 def : Pat<(v16i8 immAllOnesV), (V_SETALLONES)>, Requires<[HasSSE2]>;
@@ -2365,10 +2361,10 @@ def : Pat<(v16i8 (vector_shuffle immAllZerosV,
 // Zeroing a VR128 then do a MOVS{S|D} to the lower bits.
 def : Pat<(v2f64 (vector_shuffle immAllZerosV,
                   (v2f64 (scalar_to_vector FR64:$src)), MOVL_shuffle_mask)),
-          (MOVLSD2PDrr (V_SET0_PD), FR64:$src)>, Requires<[HasSSE2]>;
+          (MOVLSD2PDrr (V_SET0), FR64:$src)>, Requires<[HasSSE2]>;
 def : Pat<(v4f32 (vector_shuffle immAllZerosV,
                   (v4f32 (scalar_to_vector FR32:$src)), MOVL_shuffle_mask)),
-          (MOVLSS2PSrr (V_SET0_PS), FR32:$src)>, Requires<[HasSSE2]>;
+          (MOVLSS2PSrr (V_SET0), FR32:$src)>, Requires<[HasSSE2]>;
 }
 
 // Splat v2f64 / v2i64