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[X86] Add test case for missed opportunity to commute a VCMP instruction after unfolding one load in order to fold another load. 

llvm-svn: 372066
This commit is contained in:
Craig Topper 2019-09-17 04:41:01 +00:00
parent 359918dadf
commit d51576a3f0
1 changed files with 37 additions and 0 deletions
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37
llvm/test/CodeGen/X86/avx512-broadcast-unfold.ll
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@ -4448,3 +4448,40 @@ bb1: ; preds = %bb1, %bb
bb10: ; preds = %bb1
ret void
}
define void @bcast_unfold_cmp_v8f32_refold(float* nocapture %0) {
; CHECK-LABEL: bcast_unfold_cmp_v8f32_refold:
; CHECK: # %bb.0:
; CHECK-NEXT: movq $-4096, %rax # imm = 0xF000
; CHECK-NEXT: vbroadcastss {{.*#+}} ymm0 = [2.0E+0,2.0E+0,2.0E+0,2.0E+0,2.0E+0,2.0E+0,2.0E+0,2.0E+0]
; CHECK-NEXT: vbroadcastss {{.*#+}} ymm1 = [3.0E+0,3.0E+0,3.0E+0,3.0E+0,3.0E+0,3.0E+0,3.0E+0,3.0E+0]
; CHECK-NEXT: .p2align 4, 0x90
; CHECK-NEXT: .LBB126_1: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: vmovups 4096(%rdi,%rax), %ymm2
; CHECK-NEXT: vcmpltps %ymm0, %ymm2, %k1
; CHECK-NEXT: vmovaps %ymm1, %ymm2
; CHECK-NEXT: vbroadcastss {{.*}}(%rip), %ymm2 {%k1}
; CHECK-NEXT: vmovups %ymm2, 4096(%rdi,%rax)
; CHECK-NEXT: addq $32, %rax
; CHECK-NEXT: jne .LBB126_1
; CHECK-NEXT: # %bb.2:
; CHECK-NEXT: vzeroupper
; CHECK-NEXT: retq
br label %2
2: ; preds = %2, %1
%3 = phi i64 [ 0, %1 ], [ %10, %2 ]
%4 = getelementptr inbounds float, float* %0, i64 %3
%5 = bitcast float* %4 to <8 x float>*
%6 = load <8 x float>, <8 x float>* %5, align 4
%7 = fcmp olt <8 x float> %6, <float 2.000000e+00, float 2.000000e+00, float 2.000000e+00, float 2.000000e+00, float 2.000000e+00, float 2.000000e+00, float 2.000000e+00, float 2.000000e+00>
%8 = select <8 x i1> %7, <8 x float> <float 4.000000e+00, float 4.000000e+00, float 4.000000e+00, float 4.000000e+00, float 4.000000e+00, float 4.000000e+00, float 4.000000e+00, float 4.000000e+00>, <8 x float> <float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00>
%9 = bitcast float* %4 to <8 x float>*
store <8 x float> %8, <8 x float>* %9, align 4
%10 = add i64 %3, 8
%11 = icmp eq i64 %10, 1024
br i1 %11, label %12, label %2
12: ; preds = %2
ret void
}