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https://github.com/c64scene-ar/llvm-6502.git
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04402a6c13
AVX is available, and generally tidy up things surrounding UNPCK formation. Originally, I was thinking that the only advantage of PSHUFD over UNPCK instruction variants was its free copy, and otherwise we should use the shorter encoding UNPCK instructions. This isn't right though, there is a larger advantage of being able to fold a load into the operand of a PSHUFD. For UNPCK, the operand *must* be in a register so it can be the second input. This removes the UNPCK formation in the target-specific DAG combine for v4i32 shuffles. It also lifts the v8 and v16 cases out of the AVX-specific check as they are potentially replacing multiple instructions with a single instruction and so should always be valuable. The floating point checks are simplified accordingly. This also adjusts the formation of PSHUFD instructions to attempt to match the shuffle mask to one which would fit an UNPCK instruction variant. This was originally motivated to allow it to match the UNPCK instructions in the combiner, but clearly won't now. Eventually, we should add a MachineCombiner pass that can form UNPCK instructions post-RA when the operand is known to be in a register and thus there is no loss. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217755 91177308-0d34-0410-b5e6-96231b3b80d8
134 lines
4.6 KiB
LLVM
134 lines
4.6 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -mattr=+avx | FileCheck %s
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@x = common global <8 x float> zeroinitializer, align 32
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@y = common global <4 x double> zeroinitializer, align 32
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@z = common global <4 x float> zeroinitializer, align 16
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define void @zero128() nounwind ssp {
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entry:
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; CHECK: vxorps
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; CHECK: vmovaps
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store <4 x float> zeroinitializer, <4 x float>* @z, align 16
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ret void
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}
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define void @zero256() nounwind ssp {
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entry:
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; CHECK: vxorps
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; CHECK: vmovaps
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; CHECK: vmovaps
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store <8 x float> zeroinitializer, <8 x float>* @x, align 32
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store <4 x double> zeroinitializer, <4 x double>* @y, align 32
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ret void
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}
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; CHECK: vpcmpeqd
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; CHECK: vinsertf128 $1
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define void @ones([0 x float]* nocapture %RET, [0 x float]* nocapture %aFOO) nounwind {
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allocas:
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%ptr2vec615 = bitcast [0 x float]* %RET to <8 x float>*
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store <8 x float> <float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float
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0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float
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0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000>, <8 x
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float>* %ptr2vec615, align 32
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ret void
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}
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; CHECK: vpcmpeqd
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; CHECK: vinsertf128 $1
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define void @ones2([0 x i32]* nocapture %RET, [0 x i32]* nocapture %aFOO) nounwind {
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allocas:
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%ptr2vec615 = bitcast [0 x i32]* %RET to <8 x i32>*
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store <8 x i32> <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1>, <8 x i32>* %ptr2vec615, align 32
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ret void
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}
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;;; Just make sure this doesn't crash
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; CHECK: _ISelCrash
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define <4 x i64> @ISelCrash(<4 x i64> %a) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <4 x i64> %a, <4 x i64> undef, <4 x i32> <i32 2, i32 3, i32 4, i32 4>
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ret <4 x i64> %shuffle
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}
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;;;
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;;; Check that some 256-bit vectors are xformed into 128 ops
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; CHECK: _A
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; CHECK: vshufpd $1
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; CHECK-NEXT: vextractf128 $1
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; CHECK-NEXT: vshufpd $1
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; CHECK-NEXT: vinsertf128 $1
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define <4 x i64> @A(<4 x i64> %a, <4 x i64> %b) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <4 x i64> %a, <4 x i64> %b, <4 x i32> <i32 1, i32 0, i32 7, i32 6>
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ret <4 x i64> %shuffle
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}
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; CHECK: _B
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; CHECK: vshufpd $1, %ymm
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define <4 x i64> @B(<4 x i64> %a, <4 x i64> %b) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <4 x i64> %a, <4 x i64> %b, <4 x i32> <i32 1, i32 undef, i32 undef, i32 6>
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ret <4 x i64> %shuffle
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}
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; CHECK: vmovlhps
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; CHECK-NEXT: vextractf128 $1
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; CHECK-NEXT: vmovlhps
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; CHECK-NEXT: vinsertf128 $1
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define <4 x i64> @C(<4 x i64> %a, <4 x i64> %b) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <4 x i64> %a, <4 x i64> %b, <4 x i32> <i32 undef, i32 0, i32 undef, i32 6>
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ret <4 x i64> %shuffle
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}
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; CHECK: vpshufd $-96
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; CHECK: vpshufd $-6
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; CHECK: vinsertf128 $1
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define <8 x i32> @D(<8 x i32> %a, <8 x i32> %b) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <8 x i32> %a, <8 x i32> %b, <8 x i32> <i32 0, i32 0, i32 2, i32 2, i32 10, i32 10, i32 11, i32 11>
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ret <8 x i32> %shuffle
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}
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;;; Don't crash on movd
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; CHECK: _VMOVZQI2PQI
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; CHECK: vmovd (%
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define <8 x i32> @VMOVZQI2PQI([0 x float]* nocapture %aFOO) nounwind {
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allocas:
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%ptrcast.i33.i = bitcast [0 x float]* %aFOO to i32*
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%val.i34.i = load i32* %ptrcast.i33.i, align 4
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%ptroffset.i22.i992 = getelementptr [0 x float]* %aFOO, i64 0, i64 1
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%ptrcast.i23.i = bitcast float* %ptroffset.i22.i992 to i32*
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%val.i24.i = load i32* %ptrcast.i23.i, align 4
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%updatedret.i30.i = insertelement <8 x i32> undef, i32 %val.i34.i, i32 1
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ret <8 x i32> %updatedret.i30.i
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}
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;;;; Don't crash on fneg
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; rdar://10566486
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; CHECK: fneg
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; CHECK: vxorps
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define <16 x float> @fneg(<16 x float> %a) nounwind {
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%1 = fsub <16 x float> <float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00>, %a
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ret <16 x float> %1
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}
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;;; Don't crash on build vector
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; CHECK: @build_vec_16x16
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; CHECK: vmovd
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define <16 x i16> @build_vec_16x16(i16 %a) nounwind readonly {
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%res = insertelement <16 x i16> <i16 undef, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0, i16 0>, i16 %a, i32 0
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ret <16 x i16> %res
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}
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;;; Check that VMOVPQIto64rr generates the assembly string "vmovq". Previously
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;;; an incorrect mnemonic of "movd" was printed for this instruction.
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; CHECK: VMOVPQIto64rr
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; CHECK: vmovq
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define i64 @VMOVPQIto64rr(<2 x i64> %a) {
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entry:
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%vecext.i = extractelement <2 x i64> %a, i32 0
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ret i64 %vecext.i
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}
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