[llvm] r315767 - [X86] Use fsub in the movddup scheduling tests to prevent a future patch from folding movddup as a broadcast load.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Fri Oct 13 14:56:45 2017
New Revision: 315767

URL: http://llvm.org/viewvc/llvm-project?rev=315767&view=rev
Log:
[X86] Use fsub in the movddup scheduling tests to prevent a future patch from folding movddup as a broadcast load.

Modified:
    llvm/trunk/test/CodeGen/X86/sse3-schedule.ll

Modified: llvm/trunk/test/CodeGen/X86/sse3-schedule.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/sse3-schedule.ll?rev=315767&r1=315766&r2=315767&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/sse3-schedule.ll (original)
+++ llvm/trunk/test/CodeGen/X86/sse3-schedule.ll Fri Oct 13 14:56:45 2017
@@ -501,14 +501,14 @@ define <2 x double> @test_movddup(<2 x d
 ; GENERIC:       # BB#0:
 ; GENERIC-NEXT:    movddup {{.*#+}} xmm1 = xmm0[0,0] sched: [1:1.00]
 ; GENERIC-NEXT:    movddup {{.*#+}} xmm0 = mem[0,0] sched: [6:0.50]
-; GENERIC-NEXT:    addpd %xmm1, %xmm0 # sched: [3:1.00]
+; GENERIC-NEXT:    subpd %xmm1, %xmm0 # sched: [3:1.00]
 ; GENERIC-NEXT:    retq # sched: [1:1.00]
 ;
 ; ATOM-LABEL: test_movddup:
 ; ATOM:       # BB#0:
 ; ATOM-NEXT:    movddup {{.*#+}} xmm1 = mem[0,0] sched: [1:1.00]
 ; ATOM-NEXT:    movddup {{.*#+}} xmm0 = xmm0[0,0] sched: [1:1.00]
-; ATOM-NEXT:    addpd %xmm0, %xmm1 # sched: [6:3.00]
+; ATOM-NEXT:    subpd %xmm0, %xmm1 # sched: [6:3.00]
 ; ATOM-NEXT:    movapd %xmm1, %xmm0 # sched: [1:0.50]
 ; ATOM-NEXT:    retq # sched: [79:39.50]
 ;
@@ -516,54 +516,54 @@ define <2 x double> @test_movddup(<2 x d
 ; SLM:       # BB#0:
 ; SLM-NEXT:    movddup {{.*#+}} xmm1 = xmm0[0,0] sched: [1:1.00]
 ; SLM-NEXT:    movddup {{.*#+}} xmm0 = mem[0,0] sched: [3:1.00]
-; SLM-NEXT:    addpd %xmm1, %xmm0 # sched: [3:1.00]
+; SLM-NEXT:    subpd %xmm1, %xmm0 # sched: [3:1.00]
 ; SLM-NEXT:    retq # sched: [4:1.00]
 ;
 ; SANDY-LABEL: test_movddup:
 ; SANDY:       # BB#0:
 ; SANDY-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0] sched: [1:1.00]
 ; SANDY-NEXT:    vmovddup {{.*#+}} xmm1 = mem[0,0] sched: [6:0.50]
-; SANDY-NEXT:    vaddpd %xmm1, %xmm0, %xmm0 # sched: [3:1.00]
+; SANDY-NEXT:    vsubpd %xmm0, %xmm1, %xmm0 # sched: [3:1.00]
 ; SANDY-NEXT:    retq # sched: [1:1.00]
 ;
 ; HASWELL-LABEL: test_movddup:
 ; HASWELL:       # BB#0:
 ; HASWELL-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0] sched: [1:1.00]
 ; HASWELL-NEXT:    vmovddup {{.*#+}} xmm1 = mem[0,0] sched: [1:0.50]
-; HASWELL-NEXT:    vaddpd %xmm1, %xmm0, %xmm0 # sched: [3:1.00]
+; HASWELL-NEXT:    vsubpd %xmm0, %xmm1, %xmm0 # sched: [3:1.00]
 ; HASWELL-NEXT:    retq # sched: [2:1.00]
 ;
 ; SKYLAKE-LABEL: test_movddup:
 ; SKYLAKE:       # BB#0:
 ; SKYLAKE-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0] sched: [1:1.00]
 ; SKYLAKE-NEXT:    vmovddup {{.*#+}} xmm1 = mem[0,0] sched: [1:0.50]
-; SKYLAKE-NEXT:    vaddpd %xmm1, %xmm0, %xmm0 # sched: [4:0.50]
+; SKYLAKE-NEXT:    vsubpd %xmm0, %xmm1, %xmm0 # sched: [4:0.50]
 ; SKYLAKE-NEXT:    retq # sched: [2:1.00]
 ;
 ; SKX-LABEL: test_movddup:
 ; SKX:       # BB#0:
 ; SKX-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0] sched: [1:1.00]
 ; SKX-NEXT:    vmovddup {{.*#+}} xmm1 = mem[0,0] sched: [5:0.50]
-; SKX-NEXT:    vaddpd %xmm1, %xmm0, %xmm0 # sched: [4:0.33]
+; SKX-NEXT:    vsubpd %xmm0, %xmm1, %xmm0 # sched: [4:0.33]
 ; SKX-NEXT:    retq # sched: [7:1.00]
 ;
 ; BTVER2-LABEL: test_movddup:
 ; BTVER2:       # BB#0:
 ; BTVER2-NEXT:    vmovddup {{.*#+}} xmm1 = mem[0,0] sched: [5:1.00]
 ; BTVER2-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0] sched: [1:0.50]
-; BTVER2-NEXT:    vaddpd %xmm1, %xmm0, %xmm0 # sched: [3:1.00]
+; BTVER2-NEXT:    vsubpd %xmm0, %xmm1, %xmm0 # sched: [3:1.00]
 ; BTVER2-NEXT:    retq # sched: [4:1.00]
 ;
 ; ZNVER1-LABEL: test_movddup:
 ; ZNVER1:       # BB#0:
 ; ZNVER1-NEXT:    vmovddup {{.*#+}} xmm1 = mem[0,0] sched: [8:0.50]
 ; ZNVER1-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0] sched: [1:0.50]
-; ZNVER1-NEXT:    vaddpd %xmm1, %xmm0, %xmm0 # sched: [3:1.00]
+; ZNVER1-NEXT:    vsubpd %xmm0, %xmm1, %xmm0 # sched: [3:1.00]
 ; ZNVER1-NEXT:    retq # sched: [1:0.50]
   %1 = shufflevector <2 x double> %a0, <2 x double> undef, <2 x i32> zeroinitializer
   %2 = load <2 x double>, <2 x double> *%a1, align 16
   %3 = shufflevector <2 x double> %2, <2 x double> undef, <2 x i32> zeroinitializer
-  %4 = fadd <2 x double> %1, %3
+  %4 = fsub <2 x double> %3, %1 ; Use fsub to stop the movddup from being folded as a broadcast load in avx512vl.
   ret <2 x double> %4
 }