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      1 ; RUN: llc < %s -march=arm64 -aarch64-stp-suppress=false -verify-machineinstrs -mcpu=cyclone | FileCheck %s
      2 
      3 ; CHECK-LABEL: stp_int
      4 ; CHECK: stp w0, w1, [x2]
      5 define void @stp_int(i32 %a, i32 %b, i32* nocapture %p) nounwind {
      6   store i32 %a, i32* %p, align 4
      7   %add.ptr = getelementptr inbounds i32, i32* %p, i64 1
      8   store i32 %b, i32* %add.ptr, align 4
      9   ret void
     10 }
     11 
     12 ; CHECK-LABEL: stp_long
     13 ; CHECK: stp x0, x1, [x2]
     14 define void @stp_long(i64 %a, i64 %b, i64* nocapture %p) nounwind {
     15   store i64 %a, i64* %p, align 8
     16   %add.ptr = getelementptr inbounds i64, i64* %p, i64 1
     17   store i64 %b, i64* %add.ptr, align 8
     18   ret void
     19 }
     20 
     21 ; CHECK-LABEL: stp_float
     22 ; CHECK: stp s0, s1, [x0]
     23 define void @stp_float(float %a, float %b, float* nocapture %p) nounwind {
     24   store float %a, float* %p, align 4
     25   %add.ptr = getelementptr inbounds float, float* %p, i64 1
     26   store float %b, float* %add.ptr, align 4
     27   ret void
     28 }
     29 
     30 ; CHECK-LABEL: stp_double
     31 ; CHECK: stp d0, d1, [x0]
     32 define void @stp_double(double %a, double %b, double* nocapture %p) nounwind {
     33   store double %a, double* %p, align 8
     34   %add.ptr = getelementptr inbounds double, double* %p, i64 1
     35   store double %b, double* %add.ptr, align 8
     36   ret void
     37 }
     38 
     39 ; Test the load/store optimizer---combine ldurs into a ldp, if appropriate
     40 define void @stur_int(i32 %a, i32 %b, i32* nocapture %p) nounwind {
     41 ; CHECK-LABEL: stur_int
     42 ; CHECK: stp w{{[0-9]+}}, {{w[0-9]+}}, [x{{[0-9]+}}, #-8]
     43 ; CHECK-NEXT: ret
     44   %p1 = getelementptr inbounds i32, i32* %p, i32 -1
     45   store i32 %a, i32* %p1, align 2
     46   %p2 = getelementptr inbounds i32, i32* %p, i32 -2
     47   store i32 %b, i32* %p2, align 2
     48   ret void
     49 }
     50 
     51 define void @stur_long(i64 %a, i64 %b, i64* nocapture %p) nounwind {
     52 ; CHECK-LABEL: stur_long
     53 ; CHECK: stp x{{[0-9]+}}, {{x[0-9]+}}, [x{{[0-9]+}}, #-16]
     54 ; CHECK-NEXT: ret
     55   %p1 = getelementptr inbounds i64, i64* %p, i32 -1
     56   store i64 %a, i64* %p1, align 2
     57   %p2 = getelementptr inbounds i64, i64* %p, i32 -2
     58   store i64 %b, i64* %p2, align 2
     59   ret void
     60 }
     61 
     62 define void @stur_float(float %a, float %b, float* nocapture %p) nounwind {
     63 ; CHECK-LABEL: stur_float
     64 ; CHECK: stp s{{[0-9]+}}, {{s[0-9]+}}, [x{{[0-9]+}}, #-8]
     65 ; CHECK-NEXT: ret
     66   %p1 = getelementptr inbounds float, float* %p, i32 -1
     67   store float %a, float* %p1, align 2
     68   %p2 = getelementptr inbounds float, float* %p, i32 -2
     69   store float %b, float* %p2, align 2
     70   ret void
     71 }
     72 
     73 define void @stur_double(double %a, double %b, double* nocapture %p) nounwind {
     74 ; CHECK-LABEL: stur_double
     75 ; CHECK: stp d{{[0-9]+}}, {{d[0-9]+}}, [x{{[0-9]+}}, #-16]
     76 ; CHECK-NEXT: ret
     77   %p1 = getelementptr inbounds double, double* %p, i32 -1
     78   store double %a, double* %p1, align 2
     79   %p2 = getelementptr inbounds double, double* %p, i32 -2
     80   store double %b, double* %p2, align 2
     81   ret void
     82 }
     83 
     84 define void @splat_v4i32(i32 %v, i32 *%p) {
     85 entry:
     86 
     87 ; CHECK-LABEL: splat_v4i32
     88 ; CHECK-DAG: stp w0, w0, [x1]
     89 ; CHECK-DAG: stp w0, w0, [x1, #8]
     90 ; CHECK: ret
     91 
     92   %p17 = insertelement <4 x i32> undef, i32 %v, i32 0
     93   %p18 = insertelement <4 x i32> %p17, i32 %v, i32 1
     94   %p19 = insertelement <4 x i32> %p18, i32 %v, i32 2
     95   %p20 = insertelement <4 x i32> %p19, i32 %v, i32 3
     96   %p21 = bitcast i32* %p to <4 x i32>*
     97   store <4 x i32> %p20, <4 x i32>* %p21, align 4
     98   ret void
     99 }
    100 
    101 ; Read of %b to compute %tmp2 shouldn't prevent formation of stp
    102 ; CHECK-LABEL: stp_int_rar_hazard
    103 ; CHECK: ldr [[REG:w[0-9]+]], [x2, #8]
    104 ; CHECK: add w8, [[REG]], w1
    105 ; CHECK: stp w0, w1, [x2]
    106 ; CHECK: ret
    107 define i32 @stp_int_rar_hazard(i32 %a, i32 %b, i32* nocapture %p) nounwind {
    108   store i32 %a, i32* %p, align 4
    109   %ld.ptr = getelementptr inbounds i32, i32* %p, i64 2
    110   %tmp = load i32, i32* %ld.ptr, align 4
    111   %tmp2 = add i32 %tmp, %b
    112   %add.ptr = getelementptr inbounds i32, i32* %p, i64 1
    113   store i32 %b, i32* %add.ptr, align 4
    114   ret i32 %tmp2
    115 }
    116 
    117 ; Read of %b to compute %tmp2 shouldn't prevent formation of stp
    118 ; CHECK-LABEL: stp_int_rar_hazard_after
    119 ; CHECK: ldr [[REG:w[0-9]+]], [x3, #4]
    120 ; CHECK: add w0, [[REG]], w2
    121 ; CHECK: stp w1, w2, [x3]
    122 ; CHECK: ret
    123 define i32 @stp_int_rar_hazard_after(i32 %w0, i32 %a, i32 %b, i32* nocapture %p) nounwind {
    124   store i32 %a, i32* %p, align 4
    125   %ld.ptr = getelementptr inbounds i32, i32* %p, i64 1
    126   %tmp = load i32, i32* %ld.ptr, align 4
    127   %tmp2 = add i32 %tmp, %b
    128   %add.ptr = getelementptr inbounds i32, i32* %p, i64 1
    129   store i32 %b, i32* %add.ptr, align 4
    130   ret i32 %tmp2
    131 }
    132