146 lines
4.9 KiB
LLVM
146 lines
4.9 KiB
LLVM
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; RUN: llc < %s -mtriple=arm64-eabi -enable-misched=false -aarch64-enable-stp-suppress=false -verify-machineinstrs | FileCheck %s
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; The next set of tests makes sure we can combine the second instruction into
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; the first.
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; CHECK-LABEL: stp_int_aa
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; CHECK: stp w0, w1, [x2]
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; CHECK: ldr w0, [x2, #8]
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; CHECK: ret
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define i32 @stp_int_aa(i32 %a, i32 %b, i32* nocapture %p) nounwind {
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store i32 %a, i32* %p, align 4
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%ld.ptr = getelementptr inbounds i32, i32* %p, i64 2
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%tmp = load i32, i32* %ld.ptr, align 4
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%add.ptr = getelementptr inbounds i32, i32* %p, i64 1
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store i32 %b, i32* %add.ptr, align 4
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ret i32 %tmp
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}
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; CHECK-LABEL: stp_long_aa
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; CHECK: stp x0, x1, [x2]
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; CHECK: ldr x0, [x2, #16]
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; CHECK: ret
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define i64 @stp_long_aa(i64 %a, i64 %b, i64* nocapture %p) nounwind {
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store i64 %a, i64* %p, align 8
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%ld.ptr = getelementptr inbounds i64, i64* %p, i64 2
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%tmp = load i64, i64* %ld.ptr, align 4
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%add.ptr = getelementptr inbounds i64, i64* %p, i64 1
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store i64 %b, i64* %add.ptr, align 8
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ret i64 %tmp
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}
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; CHECK-LABEL: stp_float_aa
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; CHECK: stp s0, s1, [x0]
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; CHECK: ldr s0, [x0, #8]
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; CHECK: ret
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define float @stp_float_aa(float %a, float %b, float* nocapture %p) nounwind {
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store float %a, float* %p, align 4
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%ld.ptr = getelementptr inbounds float, float* %p, i64 2
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%tmp = load float, float* %ld.ptr, align 4
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%add.ptr = getelementptr inbounds float, float* %p, i64 1
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store float %b, float* %add.ptr, align 4
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ret float %tmp
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}
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; CHECK-LABEL: stp_double_aa
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; CHECK: stp d0, d1, [x0]
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; CHECK: ldr d0, [x0, #16]
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; CHECK: ret
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define double @stp_double_aa(double %a, double %b, double* nocapture %p) nounwind {
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store double %a, double* %p, align 8
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%ld.ptr = getelementptr inbounds double, double* %p, i64 2
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%tmp = load double, double* %ld.ptr, align 4
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%add.ptr = getelementptr inbounds double, double* %p, i64 1
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store double %b, double* %add.ptr, align 8
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ret double %tmp
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}
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; The next set of tests makes sure we can combine the first instruction into
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; the second.
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; CHECK-LABEL: stp_int_aa_after
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; CHECK: ldr w0, [x3, #4]
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; CHECK: stp w1, w2, [x3]
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; CHECK: ret
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define i32 @stp_int_aa_after(i32 %w0, i32 %a, i32 %b, i32* nocapture %p) nounwind {
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store i32 %a, i32* %p, align 4
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%ld.ptr = getelementptr inbounds i32, i32* %p, i64 1
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%tmp = load i32, i32* %ld.ptr, align 4
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%add.ptr = getelementptr inbounds i32, i32* %p, i64 1
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store i32 %b, i32* %add.ptr, align 4
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ret i32 %tmp
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}
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; CHECK-LABEL: stp_long_aa_after
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; CHECK: ldr x0, [x3, #8]
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; CHECK: stp x1, x2, [x3]
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; CHECK: ret
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define i64 @stp_long_aa_after(i64 %x0, i64 %a, i64 %b, i64* nocapture %p) nounwind {
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store i64 %a, i64* %p, align 8
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%ld.ptr = getelementptr inbounds i64, i64* %p, i64 1
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%tmp = load i64, i64* %ld.ptr, align 4
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%add.ptr = getelementptr inbounds i64, i64* %p, i64 1
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store i64 %b, i64* %add.ptr, align 8
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ret i64 %tmp
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}
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; CHECK-LABEL: stp_float_aa_after
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; CHECK: ldr s0, [x0, #4]
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; CHECK: stp s1, s2, [x0]
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; CHECK: ret
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define float @stp_float_aa_after(float %s0, float %a, float %b, float* nocapture %p) nounwind {
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store float %a, float* %p, align 4
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%ld.ptr = getelementptr inbounds float, float* %p, i64 1
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%tmp = load float, float* %ld.ptr, align 4
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%add.ptr = getelementptr inbounds float, float* %p, i64 1
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store float %b, float* %add.ptr, align 4
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ret float %tmp
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}
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; CHECK-LABEL: stp_double_aa_after
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; CHECK: ldr d0, [x0, #8]
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; CHECK: stp d1, d2, [x0]
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; CHECK: ret
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define double @stp_double_aa_after(double %d0, double %a, double %b, double* nocapture %p) nounwind {
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store double %a, double* %p, align 8
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%ld.ptr = getelementptr inbounds double, double* %p, i64 1
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%tmp = load double, double* %ld.ptr, align 4
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%add.ptr = getelementptr inbounds double, double* %p, i64 1
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store double %b, double* %add.ptr, align 8
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ret double %tmp
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}
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; Check that the stores %c and %d are paired after the fadd instruction,
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; and then the stores %a and %d are paired after proving that they do not
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; depend on the (%c, %d) pair.
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;
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; CHECK-LABEL: st1:
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; CHECK: stp q0, q1, [x{{[0-9]+}}]
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; CHECK: fadd
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; CHECK: stp q2, q0, [x{{[0-9]+}}, #32]
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define void @st1(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d, float* %base, i64 %index) {
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entry:
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%a0 = getelementptr inbounds float, float* %base, i64 %index
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%b0 = getelementptr float, float* %a0, i64 4
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%c0 = getelementptr float, float* %a0, i64 8
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%d0 = getelementptr float, float* %a0, i64 12
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%a1 = bitcast float* %a0 to <4 x float>*
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%b1 = bitcast float* %b0 to <4 x float>*
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%c1 = bitcast float* %c0 to <4 x float>*
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%d1 = bitcast float* %d0 to <4 x float>*
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store <4 x float> %c, <4 x float> * %c1, align 4
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store <4 x float> %a, <4 x float> * %a1, align 4
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; This fadd forces the compiler to pair %c and %e after fadd, and leave the
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; stores %a and %b separated by a stp. The dependence analysis needs then to
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; prove that it is safe to move %b past the stp to be paired with %a.
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%e = fadd fast <4 x float> %d, %a
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store <4 x float> %e, <4 x float>* %d1, align 4
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store <4 x float> %b, <4 x float>* %b1, align 4
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ret void
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}
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