; RUN: llc < %s -mtriple=arm64-eabi -enable-misched=false -aarch64-enable-stp-suppress=false -verify-machineinstrs | FileCheck %s
; The next set of tests makes sure we can combine the second instruction into
; the first.
; CHECK-LABEL: stp_int_aa
; CHECK: stp w0, w1, [x2]
; CHECK: ldr w0, [x2, #8]
; CHECK: ret
define i32 @stp_int_aa(i32 %a, i32 %b, ptr nocapture %p) nounwind {
store i32 %a, ptr %p, align 4
%ld.ptr = getelementptr inbounds i32, ptr %p, i64 2
%tmp = load i32, ptr %ld.ptr, align 4
%add.ptr = getelementptr inbounds i32, ptr %p, i64 1
store i32 %b, ptr %add.ptr, align 4
ret i32 %tmp
}
; CHECK-LABEL: stp_long_aa
; CHECK: stp x0, x1, [x2]
; CHECK: ldr x0, [x2, #16]
; CHECK: ret
define i64 @stp_long_aa(i64 %a, i64 %b, ptr nocapture %p) nounwind {
store i64 %a, ptr %p, align 8
%ld.ptr = getelementptr inbounds i64, ptr %p, i64 2
%tmp = load i64, ptr %ld.ptr, align 4
%add.ptr = getelementptr inbounds i64, ptr %p, i64 1
store i64 %b, ptr %add.ptr, align 8
ret i64 %tmp
}
; CHECK-LABEL: stp_float_aa
; CHECK: stp s0, s1, [x0]
; CHECK: ldr s0, [x0, #8]
; CHECK: ret
define float @stp_float_aa(float %a, float %b, ptr nocapture %p) nounwind {
store float %a, ptr %p, align 4
%ld.ptr = getelementptr inbounds float, ptr %p, i64 2
%tmp = load float, ptr %ld.ptr, align 4
%add.ptr = getelementptr inbounds float, ptr %p, i64 1
store float %b, ptr %add.ptr, align 4
ret float %tmp
}
; CHECK-LABEL: stp_double_aa
; CHECK: stp d0, d1, [x0]
; CHECK: ldr d0, [x0, #16]
; CHECK: ret
define double @stp_double_aa(double %a, double %b, ptr nocapture %p) nounwind {
store double %a, ptr %p, align 8
%ld.ptr = getelementptr inbounds double, ptr %p, i64 2
%tmp = load double, ptr %ld.ptr, align 4
%add.ptr = getelementptr inbounds double, ptr %p, i64 1
store double %b, ptr %add.ptr, align 8
ret double %tmp
}
; The next set of tests makes sure we can combine the first instruction into
; the second.
; CHECK-LABEL: stp_int_aa_after
; CHECK: ldr w0, [x3, #4]
; CHECK: stp w1, w2, [x3]
; CHECK: ret
define i32 @stp_int_aa_after(i32 %w0, i32 %a, i32 %b, ptr nocapture %p) nounwind {
store i32 %a, ptr %p, align 4
%ld.ptr = getelementptr inbounds i32, ptr %p, i64 1
%tmp = load i32, ptr %ld.ptr, align 4
%add.ptr = getelementptr inbounds i32, ptr %p, i64 1
store i32 %b, ptr %add.ptr, align 4
ret i32 %tmp
}
; CHECK-LABEL: stp_long_aa_after
; CHECK: ldr x0, [x3, #8]
; CHECK: stp x1, x2, [x3]
; CHECK: ret
define i64 @stp_long_aa_after(i64 %x0, i64 %a, i64 %b, ptr nocapture %p) nounwind {
store i64 %a, ptr %p, align 8
%ld.ptr = getelementptr inbounds i64, ptr %p, i64 1
%tmp = load i64, ptr %ld.ptr, align 4
%add.ptr = getelementptr inbounds i64, ptr %p, i64 1
store i64 %b, ptr %add.ptr, align 8
ret i64 %tmp
}
; CHECK-LABEL: stp_float_aa_after
; CHECK: ldr s0, [x0, #4]
; CHECK: stp s1, s2, [x0]
; CHECK: ret
define float @stp_float_aa_after(float %s0, float %a, float %b, ptr nocapture %p) nounwind {
store float %a, ptr %p, align 4
%ld.ptr = getelementptr inbounds float, ptr %p, i64 1
%tmp = load float, ptr %ld.ptr, align 4
%add.ptr = getelementptr inbounds float, ptr %p, i64 1
store float %b, ptr %add.ptr, align 4
ret float %tmp
}
; CHECK-LABEL: stp_double_aa_after
; CHECK: ldr d0, [x0, #8]
; CHECK: stp d1, d2, [x0]
; CHECK: ret
define double @stp_double_aa_after(double %d0, double %a, double %b, ptr nocapture %p) nounwind {
store double %a, ptr %p, align 8
%ld.ptr = getelementptr inbounds double, ptr %p, i64 1
%tmp = load double, ptr %ld.ptr, align 4
%add.ptr = getelementptr inbounds double, ptr %p, i64 1
store double %b, ptr %add.ptr, align 8
ret double %tmp
}
; Check that the stores %c and %d are paired after the fadd instruction,
; and then the stores %a and %d are paired after proving that they do not
; depend on the (%c, %d) pair.
;
; CHECK-LABEL: st1:
; CHECK: stp q0, q1, [x{{[0-9]+}}]
; CHECK: fadd
; CHECK: stp q2, q0, [x{{[0-9]+}}, #32]
define void @st1(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d, ptr %base, i64 %index) {
entry:
%a0 = getelementptr inbounds float, ptr %base, i64 %index
%b0 = getelementptr float, ptr %a0, i64 4
%c0 = getelementptr float, ptr %a0, i64 8
%d0 = getelementptr float, ptr %a0, i64 12
store <4 x float> %c, ptr %c0, align 4
store <4 x float> %a, ptr %a0, align 4
; This fadd forces the compiler to pair %c and %e after fadd, and leave the
; stores %a and %b separated by a stp. The dependence analysis needs then to
; prove that it is safe to move %b past the stp to be paired with %a.
%e = fadd fast <4 x float> %d, %a
store <4 x float> %e, ptr %d0, align 4
store <4 x float> %b, ptr %b0, align 4
ret void
}
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