mirror of
https://github.com/c64scene-ar/llvm-6502.git
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fb1293fd4c
of normally binary shuffle instructions like PUNPCKL and MOVLHPS. This detects cases where a single register is used for both operands making the shuffle behave in a unary way. We detect this and adjust the mask to use the unary form which allows the existing DAG combine for shuffle instructions to actually work at all. As a consequence, this uncovered a number of obvious bugs in the existing DAG combine which are fixed. It also now canonicalizes several shuffles even with the existing lowering. These typically are trying to match the shuffle to the domain of the input where before we only really modeled them with the floating point variants. All of the cases which change to an integer shuffle here have something in the integer domain, so there are no more or fewer domain crosses here AFAICT. Technically, it might be better to go from a GPR directly to the floating point domain, but detecting floating point *outputs* despite integer inputs is a lot more code and seems unlikely to be worthwhile in practice. If folks are seeing domain-crossing regressions here though, let me know and I can hack something up to fix it. Also as a consequence, a bunch of missed opportunities to form pshufb now can be formed. Notably, splats of i8s now form pshufb. Interestingly, this improves the existing splat lowering too. We go from 3 instructions to 1. Yes, we may tie up a register, but it seems very likely to be worth it, especially if splatting the 0th byte (the common case) as then we can use a zeroed register as the mask. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214625 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: vpunpcklqdq
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; CHECK-NEXT: vextractf128 $1
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; CHECK-NEXT: vpunpcklqdq
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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: vpunpckhdq
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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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