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llvm-mirror/test/CodeGen/ARM/reg_sequence.ll
Bob Wilson 8689a52c10 Change register allocation order for ARM VFP and NEON registers to put the 
callee-saved registers at the end of the lists.  Also prefer to avoid using
the low registers that are in register subclasses required by certain
instructions, so that those registers will more likely be available when needed.
This change makes a huge improvement in spilling in some cases.  Thanks to
Jakob for helping me realize the problem.

Most of this patch is fixing the testsuite.  There are quite a few places
where we're checking for specific registers.  I changed those to wildcards
in places where that doesn't weaken the tests.  The spill-q.ll and
thumb2-spill-q.ll tests stopped spilling with this change, so I added a bunch
of live values to force spills on those tests.

llvm-svn: 116055
2010-10-08 06:15:13 +00:00

348 lines
17 KiB
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; RUN: llc < %s -march=arm -mcpu=cortex-a8 | FileCheck %s
; Implementing vld / vst as REG_SEQUENCE eliminates the extra vmov's.
%struct.int16x8_t = type { <8 x i16> }
%struct.int32x4_t = type { <4 x i32> }
%struct.__neon_int8x8x2_t = type { <8 x i8>, <8 x i8> }
%struct.__neon_int8x8x3_t = type { <8 x i8>, <8 x i8>, <8 x i8> }
%struct.__neon_int16x8x2_t = type { <8 x i16>, <8 x i16> }
%struct.__neon_int32x4x2_t = type { <4 x i32>, <4 x i32> }
define void @t1(i16* %i_ptr, i16* %o_ptr, %struct.int32x4_t* nocapture %vT0ptr, %struct.int32x4_t* nocapture %vT1ptr) nounwind {
entry:
; CHECK: t1:
; CHECK: vld1.16
; CHECK-NOT: vmov d
; CHECK: vmovl.s16
; CHECK: vshrn.i32
; CHECK: vshrn.i32
; CHECK-NOT: vmov d
; CHECK-NEXT: vst1.16
%0 = getelementptr inbounds %struct.int32x4_t* %vT0ptr, i32 0, i32 0 ; <<4 x i32>*> [#uses=1]
%1 = load <4 x i32>* %0, align 16 ; <<4 x i32>> [#uses=1]
%2 = getelementptr inbounds %struct.int32x4_t* %vT1ptr, i32 0, i32 0 ; <<4 x i32>*> [#uses=1]
%3 = load <4 x i32>* %2, align 16 ; <<4 x i32>> [#uses=1]
%4 = bitcast i16* %i_ptr to i8* ; <i8*> [#uses=1]
%5 = tail call <8 x i16> @llvm.arm.neon.vld1.v8i16(i8* %4, i32 1) ; <<8 x i16>> [#uses=1]
%6 = bitcast <8 x i16> %5 to <2 x double> ; <<2 x double>> [#uses=2]
%7 = extractelement <2 x double> %6, i32 0 ; <double> [#uses=1]
%8 = bitcast double %7 to <4 x i16> ; <<4 x i16>> [#uses=1]
%9 = sext <4 x i16> %8 to <4 x i32> ; <<4 x i32>> [#uses=1]
%10 = extractelement <2 x double> %6, i32 1 ; <double> [#uses=1]
%11 = bitcast double %10 to <4 x i16> ; <<4 x i16>> [#uses=1]
%12 = sext <4 x i16> %11 to <4 x i32> ; <<4 x i32>> [#uses=1]
%13 = mul <4 x i32> %1, %9 ; <<4 x i32>> [#uses=1]
%14 = mul <4 x i32> %3, %12 ; <<4 x i32>> [#uses=1]
%15 = tail call <4 x i16> @llvm.arm.neon.vshiftn.v4i16(<4 x i32> %13, <4 x i32> <i32 -12, i32 -12, i32 -12, i32 -12>) ; <<4 x i16>> [#uses=1]
%16 = tail call <4 x i16> @llvm.arm.neon.vshiftn.v4i16(<4 x i32> %14, <4 x i32> <i32 -12, i32 -12, i32 -12, i32 -12>) ; <<4 x i16>> [#uses=1]
%17 = shufflevector <4 x i16> %15, <4 x i16> %16, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> ; <<8 x i16>> [#uses=1]
%18 = bitcast i16* %o_ptr to i8* ; <i8*> [#uses=1]
tail call void @llvm.arm.neon.vst1.v8i16(i8* %18, <8 x i16> %17, i32 1)
ret void
}
define void @t2(i16* %i_ptr, i16* %o_ptr, %struct.int16x8_t* nocapture %vT0ptr, %struct.int16x8_t* nocapture %vT1ptr) nounwind {
entry:
; CHECK: t2:
; CHECK: vld1.16
; CHECK-NOT: vmov
; CHECK: vld1.16
; CHECK: vmul.i16
; CHECK: vmul.i16
; CHECK-NOT: vmov
; CHECK: vst1.16
; CHECK: vst1.16
%0 = getelementptr inbounds %struct.int16x8_t* %vT0ptr, i32 0, i32 0 ; <<8 x i16>*> [#uses=1]
%1 = load <8 x i16>* %0, align 16 ; <<8 x i16>> [#uses=1]
%2 = getelementptr inbounds %struct.int16x8_t* %vT1ptr, i32 0, i32 0 ; <<8 x i16>*> [#uses=1]
%3 = load <8 x i16>* %2, align 16 ; <<8 x i16>> [#uses=1]
%4 = bitcast i16* %i_ptr to i8* ; <i8*> [#uses=1]
%5 = tail call <8 x i16> @llvm.arm.neon.vld1.v8i16(i8* %4, i32 1) ; <<8 x i16>> [#uses=1]
%6 = getelementptr inbounds i16* %i_ptr, i32 8 ; <i16*> [#uses=1]
%7 = bitcast i16* %6 to i8* ; <i8*> [#uses=1]
%8 = tail call <8 x i16> @llvm.arm.neon.vld1.v8i16(i8* %7, i32 1) ; <<8 x i16>> [#uses=1]
%9 = mul <8 x i16> %1, %5 ; <<8 x i16>> [#uses=1]
%10 = mul <8 x i16> %3, %8 ; <<8 x i16>> [#uses=1]
%11 = bitcast i16* %o_ptr to i8* ; <i8*> [#uses=1]
tail call void @llvm.arm.neon.vst1.v8i16(i8* %11, <8 x i16> %9, i32 1)
%12 = getelementptr inbounds i16* %o_ptr, i32 8 ; <i16*> [#uses=1]
%13 = bitcast i16* %12 to i8* ; <i8*> [#uses=1]
tail call void @llvm.arm.neon.vst1.v8i16(i8* %13, <8 x i16> %10, i32 1)
ret void
}
define <8 x i8> @t3(i8* %A, i8* %B) nounwind {
; CHECK: t3:
; CHECK: vld3.8
; CHECK: vmul.i8
; CHECK-NOT: vmov
; CHECK: vst3.8
%tmp1 = call %struct.__neon_int8x8x3_t @llvm.arm.neon.vld3.v8i8(i8* %A, i32 1) ; <%struct.__neon_int8x8x3_t> [#uses=2]
%tmp2 = extractvalue %struct.__neon_int8x8x3_t %tmp1, 0 ; <<8 x i8>> [#uses=1]
%tmp3 = extractvalue %struct.__neon_int8x8x3_t %tmp1, 2 ; <<8 x i8>> [#uses=1]
%tmp4 = extractvalue %struct.__neon_int8x8x3_t %tmp1, 1 ; <<8 x i8>> [#uses=1]
%tmp5 = sub <8 x i8> %tmp3, %tmp4
%tmp6 = add <8 x i8> %tmp2, %tmp3 ; <<8 x i8>> [#uses=1]
%tmp7 = mul <8 x i8> %tmp4, %tmp2
tail call void @llvm.arm.neon.vst3.v8i8(i8* %B, <8 x i8> %tmp5, <8 x i8> %tmp6, <8 x i8> %tmp7, i32 1)
ret <8 x i8> %tmp4
}
define void @t4(i32* %in, i32* %out) nounwind {
entry:
; CHECK: t4:
; CHECK: vld2.32
; CHECK-NOT: vmov
; CHECK: vld2.32
; CHECK-NOT: vmov
; CHECK: bne
%tmp1 = bitcast i32* %in to i8* ; <i8*> [#uses=1]
%tmp2 = tail call %struct.__neon_int32x4x2_t @llvm.arm.neon.vld2.v4i32(i8* %tmp1, i32 1) ; <%struct.__neon_int32x4x2_t> [#uses=2]
%tmp3 = getelementptr inbounds i32* %in, i32 8 ; <i32*> [#uses=1]
%tmp4 = bitcast i32* %tmp3 to i8* ; <i8*> [#uses=1]
%tmp5 = tail call %struct.__neon_int32x4x2_t @llvm.arm.neon.vld2.v4i32(i8* %tmp4, i32 1) ; <%struct.__neon_int32x4x2_t> [#uses=2]
%tmp8 = bitcast i32* %out to i8* ; <i8*> [#uses=1]
br i1 undef, label %return1, label %return2
return1:
; CHECK: %return1
; CHECK-NOT: vmov
; CHECK-NEXT: vadd.i32
; CHECK-NEXT: vadd.i32
; CHECK-NEXT: vst2.32
%tmp52 = extractvalue %struct.__neon_int32x4x2_t %tmp2, 0 ; <<4 x i32>> [#uses=1]
%tmp57 = extractvalue %struct.__neon_int32x4x2_t %tmp2, 1 ; <<4 x i32>> [#uses=1]
%tmp = extractvalue %struct.__neon_int32x4x2_t %tmp5, 0 ; <<4 x i32>> [#uses=1]
%tmp39 = extractvalue %struct.__neon_int32x4x2_t %tmp5, 1 ; <<4 x i32>> [#uses=1]
%tmp6 = add <4 x i32> %tmp52, %tmp ; <<4 x i32>> [#uses=1]
%tmp7 = add <4 x i32> %tmp57, %tmp39 ; <<4 x i32>> [#uses=1]
tail call void @llvm.arm.neon.vst2.v4i32(i8* %tmp8, <4 x i32> %tmp6, <4 x i32> %tmp7, i32 1)
ret void
return2:
; CHECK: %return2
; CHECK: vadd.i32
; CHECK: vmov q9, q11
; CHECK-NOT: vmov
; CHECK: vst2.32 {d16, d17, d18, d19}
%tmp100 = extractvalue %struct.__neon_int32x4x2_t %tmp2, 0 ; <<4 x i32>> [#uses=1]
%tmp101 = extractvalue %struct.__neon_int32x4x2_t %tmp5, 1 ; <<4 x i32>> [#uses=1]
%tmp102 = add <4 x i32> %tmp100, %tmp101 ; <<4 x i32>> [#uses=1]
tail call void @llvm.arm.neon.vst2.v4i32(i8* %tmp8, <4 x i32> %tmp102, <4 x i32> %tmp101, i32 1)
call void @llvm.trap()
unreachable
}
define <8 x i16> @t5(i16* %A, <8 x i16>* %B) nounwind {
; CHECK: t5:
; CHECK: vldmia
; CHECK: vmov q9, q8
; CHECK-NOT: vmov
; CHECK: vld2.16 {d16[1], d18[1]}, [r0]
; CHECK-NOT: vmov
; CHECK: vadd.i16
%tmp0 = bitcast i16* %A to i8* ; <i8*> [#uses=1]
%tmp1 = load <8 x i16>* %B ; <<8 x i16>> [#uses=2]
%tmp2 = call %struct.__neon_int16x8x2_t @llvm.arm.neon.vld2lane.v8i16(i8* %tmp0, <8 x i16> %tmp1, <8 x i16> %tmp1, i32 1, i32 1) ; <%struct.__neon_int16x8x2_t> [#uses=2]
%tmp3 = extractvalue %struct.__neon_int16x8x2_t %tmp2, 0 ; <<8 x i16>> [#uses=1]
%tmp4 = extractvalue %struct.__neon_int16x8x2_t %tmp2, 1 ; <<8 x i16>> [#uses=1]
%tmp5 = add <8 x i16> %tmp3, %tmp4 ; <<8 x i16>> [#uses=1]
ret <8 x i16> %tmp5
}
define <8 x i8> @t6(i8* %A, <8 x i8>* %B) nounwind {
; CHECK: t6:
; CHECK: vldr.64
; CHECK: vmov d17, d16
; CHECK-NEXT: vld2.8 {d16[1], d17[1]}
%tmp1 = load <8 x i8>* %B ; <<8 x i8>> [#uses=2]
%tmp2 = call %struct.__neon_int8x8x2_t @llvm.arm.neon.vld2lane.v8i8(i8* %A, <8 x i8> %tmp1, <8 x i8> %tmp1, i32 1, i32 1) ; <%struct.__neon_int8x8x2_t> [#uses=2]
%tmp3 = extractvalue %struct.__neon_int8x8x2_t %tmp2, 0 ; <<8 x i8>> [#uses=1]
%tmp4 = extractvalue %struct.__neon_int8x8x2_t %tmp2, 1 ; <<8 x i8>> [#uses=1]
%tmp5 = add <8 x i8> %tmp3, %tmp4 ; <<8 x i8>> [#uses=1]
ret <8 x i8> %tmp5
}
define void @t7(i32* %iptr, i32* %optr) nounwind {
entry:
; CHECK: t7:
; CHECK: vld2.32
; CHECK: vst2.32
; CHECK: vld1.32 {d16, d17},
; CHECK: vmov q9, q8
; CHECK-NOT: vmov
; CHECK: vuzp.32 q8, q9
; CHECK: vst1.32
%0 = bitcast i32* %iptr to i8* ; <i8*> [#uses=2]
%1 = tail call %struct.__neon_int32x4x2_t @llvm.arm.neon.vld2.v4i32(i8* %0, i32 1) ; <%struct.__neon_int32x4x2_t> [#uses=2]
%tmp57 = extractvalue %struct.__neon_int32x4x2_t %1, 0 ; <<4 x i32>> [#uses=1]
%tmp60 = extractvalue %struct.__neon_int32x4x2_t %1, 1 ; <<4 x i32>> [#uses=1]
%2 = bitcast i32* %optr to i8* ; <i8*> [#uses=2]
tail call void @llvm.arm.neon.vst2.v4i32(i8* %2, <4 x i32> %tmp57, <4 x i32> %tmp60, i32 1)
%3 = tail call <4 x i32> @llvm.arm.neon.vld1.v4i32(i8* %0, i32 1) ; <<4 x i32>> [#uses=1]
%4 = shufflevector <4 x i32> %3, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 0, i32 2> ; <<4 x i32>> [#uses=1]
tail call void @llvm.arm.neon.vst1.v4i32(i8* %2, <4 x i32> %4, i32 1)
ret void
}
; PR7156
define arm_aapcs_vfpcc i32 @t8() nounwind {
; CHECK: t8:
; CHECK: vrsqrte.f32 q8, q8
bb.nph55.bb.nph55.split_crit_edge:
br label %bb3
bb3: ; preds = %bb3, %bb.nph55.bb.nph55.split_crit_edge
br i1 undef, label %bb5, label %bb3
bb5: ; preds = %bb3
br label %bb.i25
bb.i25: ; preds = %bb.i25, %bb5
%0 = shufflevector <2 x float> undef, <2 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x float>> [#uses=1]
%1 = call <4 x float> @llvm.arm.neon.vrsqrte.v4f32(<4 x float> %0) nounwind ; <<4 x float>> [#uses=1]
%2 = fmul <4 x float> %1, undef ; <<4 x float>> [#uses=1]
%3 = fmul <4 x float> undef, %2 ; <<4 x float>> [#uses=1]
%tmp26.i = bitcast <4 x float> %3 to <2 x double> ; <<2 x double>> [#uses=1]
%4 = extractelement <2 x double> %tmp26.i, i32 0 ; <double> [#uses=1]
%5 = bitcast double %4 to <2 x float> ; <<2 x float>> [#uses=1]
%6 = extractelement <2 x float> %5, i32 1 ; <float> [#uses=1]
store float %6, float* undef, align 4
br i1 undef, label %bb6, label %bb.i25
bb6: ; preds = %bb.i25
br i1 undef, label %bb7, label %bb14
bb7: ; preds = %bb6
br label %bb.i49
bb.i49: ; preds = %bb.i49, %bb7
br i1 undef, label %bb.i19, label %bb.i49
bb.i19: ; preds = %bb.i19, %bb.i49
br i1 undef, label %exit, label %bb.i19
exit: ; preds = %bb.i19
unreachable
bb14: ; preds = %bb6
ret i32 0
}
%0 = type { %1, %1, %1, %1 }
%1 = type { %2 }
%2 = type { <4 x float> }
%3 = type { %0, %1 }
; PR7157
define arm_aapcs_vfpcc float @t9(%0* nocapture, %3* nocapture) nounwind {
; CHECK: t9:
; CHECK: vldr.64
; CHECK-NOT: vmov d{{.*}}, d16
; CHECK: vmov.i32 d17
; CHECK-NEXT: vstmia r0, {d16, d17}
; CHECK-NEXT: vstmia r0, {d16, d17}
%3 = bitcast double 0.000000e+00 to <2 x float> ; <<2 x float>> [#uses=2]
%4 = shufflevector <2 x float> %3, <2 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x float>> [#uses=1]
store <4 x float> %4, <4 x float>* undef, align 16
%5 = shufflevector <2 x float> %3, <2 x float> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x float>> [#uses=1]
store <4 x float> %5, <4 x float>* undef, align 16
br label %8
; <label>:6 ; preds = %8
br label %7
; <label>:7 ; preds = %6
br label %8
; <label>:8 ; preds = %7, %2
br label %6
; <label>:9 ; preds = %8
ret float undef
; <label>:10 ; preds = %6
ret float 9.990000e+02
}
; PR7162
define arm_aapcs_vfpcc i32 @t10() nounwind {
entry:
; CHECK: t10:
; CHECK: vmov.i32 q9, #0x3F000000
; CHECK: vmov d0, d17
; CHECK: vmla.f32 q8, q8, d0[0]
%0 = shufflevector <4 x float> zeroinitializer, <4 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>> [#uses=1]
%1 = insertelement <4 x float> %0, float undef, i32 1 ; <<4 x float>> [#uses=1]
%2 = insertelement <4 x float> %1, float undef, i32 2 ; <<4 x float>> [#uses=1]
%3 = insertelement <4 x float> %2, float undef, i32 3 ; <<4 x float>> [#uses=1]
%tmp54.i = bitcast <4 x float> %3 to <2 x double> ; <<2 x double>> [#uses=1]
%4 = extractelement <2 x double> %tmp54.i, i32 1 ; <double> [#uses=1]
%5 = bitcast double %4 to <2 x float> ; <<2 x float>> [#uses=1]
%6 = shufflevector <2 x float> %5, <2 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>> [#uses=1]
%7 = fmul <4 x float> undef, %6 ; <<4 x float>> [#uses=1]
%8 = fadd <4 x float> %7, undef ; <<4 x float>> [#uses=1]
%9 = fadd <4 x float> %8, undef ; <<4 x float>> [#uses=1]
%10 = shufflevector <4 x float> undef, <4 x float> %9, <4 x i32> <i32 0, i32 1, i32 2, i32 7> ; <<4 x float>> [#uses=1]
%11 = fmul <4 x float> %10, <float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01> ; <<4 x float>> [#uses=1]
%12 = shufflevector <4 x float> %11, <4 x float> undef, <4 x i32> <i32 3, i32 undef, i32 undef, i32 undef> ; <<4 x float>> [#uses=1]
%13 = shufflevector <4 x float> %12, <4 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>> [#uses=1]
%14 = fmul <4 x float> %13, undef ; <<4 x float>> [#uses=1]
%15 = fadd <4 x float> undef, %14 ; <<4 x float>> [#uses=1]
%16 = shufflevector <4 x float> undef, <4 x float> %15, <4 x i32> <i32 0, i32 1, i32 6, i32 3> ; <<4 x float>> [#uses=1]
%17 = fmul <4 x float> %16, undef ; <<4 x float>> [#uses=1]
%18 = extractelement <4 x float> %17, i32 2 ; <float> [#uses=1]
store float %18, float* undef, align 4
br i1 undef, label %exit, label %bb14
exit: ; preds = %bb.i19
unreachable
bb14: ; preds = %bb6
ret i32 0
}
; This test crashes the coalescer because live variables were not updated properly.
define <8 x i8> @t11(i8* %A1, i8* %A2, i8* %A3, i8* %A4, i8* %A5, i8* %A6, i8* %A7, i8* %A8, i8* %B) nounwind {
%tmp1d = call %struct.__neon_int8x8x3_t @llvm.arm.neon.vld3.v8i8(i8* %A4, i32 1) ; <%struct.__neon_int8x8x3_t> [#uses=1]
%tmp2d = extractvalue %struct.__neon_int8x8x3_t %tmp1d, 0 ; <<8 x i8>> [#uses=1]
%tmp1f = call %struct.__neon_int8x8x3_t @llvm.arm.neon.vld3.v8i8(i8* %A6, i32 1) ; <%struct.__neon_int8x8x3_t> [#uses=1]
%tmp2f = extractvalue %struct.__neon_int8x8x3_t %tmp1f, 0 ; <<8 x i8>> [#uses=1]
%tmp2bd = add <8 x i8> zeroinitializer, %tmp2d ; <<8 x i8>> [#uses=1]
%tmp2abcd = mul <8 x i8> zeroinitializer, %tmp2bd ; <<8 x i8>> [#uses=1]
%tmp2ef = sub <8 x i8> zeroinitializer, %tmp2f ; <<8 x i8>> [#uses=1]
%tmp2efgh = mul <8 x i8> %tmp2ef, undef ; <<8 x i8>> [#uses=2]
call void @llvm.arm.neon.vst3.v8i8(i8* %A2, <8 x i8> undef, <8 x i8> undef, <8 x i8> %tmp2efgh, i32 1)
%tmp2 = sub <8 x i8> %tmp2efgh, %tmp2abcd ; <<8 x i8>> [#uses=1]
%tmp7 = mul <8 x i8> undef, %tmp2 ; <<8 x i8>> [#uses=1]
tail call void @llvm.arm.neon.vst3.v8i8(i8* %B, <8 x i8> undef, <8 x i8> undef, <8 x i8> %tmp7, i32 1)
ret <8 x i8> undef
}
declare <4 x i32> @llvm.arm.neon.vld1.v4i32(i8*, i32) nounwind readonly
declare <8 x i16> @llvm.arm.neon.vld1.v8i16(i8*, i32) nounwind readonly
declare <4 x i16> @llvm.arm.neon.vshiftn.v4i16(<4 x i32>, <4 x i32>) nounwind readnone
declare void @llvm.arm.neon.vst1.v4i32(i8*, <4 x i32>, i32) nounwind
declare void @llvm.arm.neon.vst1.v8i16(i8*, <8 x i16>, i32) nounwind
declare void @llvm.arm.neon.vst3.v8i8(i8*, <8 x i8>, <8 x i8>, <8 x i8>, i32)
nounwind
declare %struct.__neon_int8x8x3_t @llvm.arm.neon.vld3.v8i8(i8*, i32) nounwind readonly
declare %struct.__neon_int32x4x2_t @llvm.arm.neon.vld2.v4i32(i8*, i32) nounwind readonly
declare %struct.__neon_int8x8x2_t @llvm.arm.neon.vld2lane.v8i8(i8*, <8 x i8>, <8 x i8>, i32, i32) nounwind readonly
declare %struct.__neon_int16x8x2_t @llvm.arm.neon.vld2lane.v8i16(i8*, <8 x i16>, <8 x i16>, i32, i32) nounwind readonly
declare void @llvm.arm.neon.vst2.v4i32(i8*, <4 x i32>, <4 x i32>, i32) nounwind
declare <4 x float> @llvm.arm.neon.vrsqrte.v4f32(<4 x float>) nounwind readnone
declare void @llvm.trap() nounwind
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