From d7dfe64614a2dd8dac61bb918dff31df5c104aca Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Mon, 12 Dec 2016 07:57:21 +0000
Subject: [PATCH] [X86] Change CMPSS/CMPSD intrinsic instructions to use
 sse_load_f32/f64 as its memory pattern instead of full vector load.

These intrinsics only load a single element. We should use sse_loadf32/f64 to give more options of what loads it can match.

Currently these instructions are often only getting their load folded thanks to the load folding in the peephole pass. I plan to add more types of loads to sse_load_f32/64 so we can match without the peephole.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289423 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86InstrSSE.td | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index c9a6b4e523c..9a54e98f771 100644
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -2317,9 +2317,9 @@ let Constraints = "$src1 = $dst" in {
                   SSE_ALU_F64S, i8immZExt3>, XD;
 }
 
-multiclass sse12_cmp_scalar_int<X86MemOperand x86memop, Operand CC,
+multiclass sse12_cmp_scalar_int<Operand memop, Operand CC,
                          Intrinsic Int, string asm, OpndItins itins,
-                         ImmLeaf immLeaf> {
+                         ImmLeaf immLeaf, ComplexPattern mem_cpat> {
   def rr : SIi8<0xC2, MRMSrcReg, (outs VR128:$dst),
                       (ins VR128:$src1, VR128:$src, CC:$cc), asm,
                         [(set VR128:$dst, (Int VR128:$src1,
@@ -2327,30 +2327,30 @@ multiclass sse12_cmp_scalar_int<X86MemOperand x86memop, Operand CC,
                                                itins.rr>,
            Sched<[itins.Sched]>;
   def rm : SIi8<0xC2, MRMSrcMem, (outs VR128:$dst),
-                      (ins VR128:$src1, x86memop:$src, CC:$cc), asm,
+                      (ins VR128:$src1, memop:$src, CC:$cc), asm,
                         [(set VR128:$dst, (Int VR128:$src1,
-                                               (load addr:$src), immLeaf:$cc))],
+                                               mem_cpat:$src, immLeaf:$cc))],
                                                itins.rm>,
            Sched<[itins.Sched.Folded, ReadAfterLd]>;
 }
 
 let isCodeGenOnly = 1 in {
   // Aliases to match intrinsics which expect XMM operand(s).
-  defm Int_VCMPSS  : sse12_cmp_scalar_int<f32mem, AVXCC, int_x86_sse_cmp_ss,
+  defm Int_VCMPSS  : sse12_cmp_scalar_int<ssmem, AVXCC, int_x86_sse_cmp_ss,
                        "cmp${cc}ss\t{$src, $src1, $dst|$dst, $src1, $src}",
-                       SSE_ALU_F32S, i8immZExt5>,
+                       SSE_ALU_F32S, i8immZExt5, sse_load_f32>,
                        XS, VEX_4V;
-  defm Int_VCMPSD  : sse12_cmp_scalar_int<f64mem, AVXCC, int_x86_sse2_cmp_sd,
+  defm Int_VCMPSD  : sse12_cmp_scalar_int<sdmem, AVXCC, int_x86_sse2_cmp_sd,
                        "cmp${cc}sd\t{$src, $src1, $dst|$dst, $src1, $src}",
-                       SSE_ALU_F32S, i8immZExt5>, // same latency as f32
+                       SSE_ALU_F32S, i8immZExt5, sse_load_f64>, // same latency as f32
                        XD, VEX_4V;
   let Constraints = "$src1 = $dst" in {
-    defm Int_CMPSS  : sse12_cmp_scalar_int<f32mem, SSECC, int_x86_sse_cmp_ss,
+    defm Int_CMPSS  : sse12_cmp_scalar_int<ssmem, SSECC, int_x86_sse_cmp_ss,
                          "cmp${cc}ss\t{$src, $dst|$dst, $src}",
-                         SSE_ALU_F32S, i8immZExt3>, XS;
-    defm Int_CMPSD  : sse12_cmp_scalar_int<f64mem, SSECC, int_x86_sse2_cmp_sd,
+                         SSE_ALU_F32S, i8immZExt3, sse_load_f32>, XS;
+    defm Int_CMPSD  : sse12_cmp_scalar_int<sdmem, SSECC, int_x86_sse2_cmp_sd,
                          "cmp${cc}sd\t{$src, $dst|$dst, $src}",
-                         SSE_ALU_F64S, i8immZExt3>,
+                         SSE_ALU_F64S, i8immZExt3, sse_load_f64>,
                          XD;
 }
 }
-- 
2.11.0