2016-02-06 02:14:24 +08:00
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; PR26374: Check no stack slots are allocated for vregs which have no real reference.
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; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.ImageParameters = type { i32, i32, [0 x [16 x i16]] }
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%struct.InputParameters = type { i32, i32 }
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@c = common global %struct.ImageParameters* null, align 8
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@a = common global i16** null, align 8
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@d = common global [6 x i32] zeroinitializer, align 16
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@b = common global %struct.InputParameters* null, align 8
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@e = common global [4 x i32] zeroinitializer, align 16
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; It is not easy to check there is no unused holes in stack allocated for spills,
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; so simply check the size of stack allocated cannot exceed 350.
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; (408 is used before the fix for PR26374. 344 is used after the fix).
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;
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; CHECK-LABEL: @fn
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; CHECK: subq {{\$3[0-4][0-9]}}, %rsp
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; Function Attrs: nounwind uwtable
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define i32 @fn() #0 {
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entry:
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%n = alloca [8 x [8 x i32]], align 16
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%tmp = bitcast [8 x [8 x i32]]* %n to i8*
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2017-04-11 04:18:21 +08:00
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call void @llvm.lifetime.start.p0i8(i64 256, i8* %tmp) #3
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2016-02-06 02:14:24 +08:00
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%tmp1 = bitcast [8 x [8 x i32]]* %n to i8*
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%arraydecay.1 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 1, i64 0
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%tmp2 = bitcast i32* %arraydecay.1 to i8*
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%arraydecay.2 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 2, i64 0
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%tmp3 = bitcast i32* %arraydecay.2 to i8*
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%arraydecay.3 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 3, i64 0
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%tmp4 = bitcast i32* %arraydecay.3 to i8*
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%arraydecay.4 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 4, i64 0
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%tmp5 = bitcast i32* %arraydecay.4 to i8*
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%arraydecay.5 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 5, i64 0
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%tmp6 = bitcast i32* %arraydecay.5 to i8*
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%arraydecay.6 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 6, i64 0
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%tmp7 = bitcast i32* %arraydecay.6 to i8*
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%arraydecay.7 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 7, i64 0
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%tmp8 = bitcast i32* %arraydecay.7 to i8*
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br label %for.body
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for.body: ; preds = %for.inc73, %entry
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%q.0131 = phi i32 [ 0, %entry ], [ %inc74, %for.inc73 ]
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%m.0130 = phi i32 [ 0, %entry ], [ %m.4, %for.inc73 ]
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%div = sdiv i32 %q.0131, 2
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%shl = shl i32 %div, 3
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%rem = srem i32 %q.0131, 2
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%shl1 = shl nsw i32 %rem, 3
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%tmp9 = sext i32 %shl1 to i64
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%tmp10 = sext i32 %shl to i64
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%tmp11 = or i32 %shl1, 4
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%tmp12 = sext i32 %tmp11 to i64
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%tmp13 = or i32 %shl, 4
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%tmp14 = sext i32 %tmp13 to i64
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br label %for.body4
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for.body4: ; preds = %for.inc48, %for.body
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%indvars.iv148 = phi i64 [ %tmp10, %for.body ], [ %indvars.iv.next149, %for.inc48 ]
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%m.1126 = phi i32 [ %m.0130, %for.body ], [ %m.3.lcssa, %for.inc48 ]
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%tmp15 = load %struct.ImageParameters*, %struct.ImageParameters** @c, align 8
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%opix_y = getelementptr inbounds %struct.ImageParameters, %struct.ImageParameters* %tmp15, i64 0, i32 1
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%tmp16 = load i32, i32* %opix_y, align 4
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%tmp17 = trunc i64 %indvars.iv148 to i32
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%add5 = add nsw i32 %tmp16, %tmp17
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%tmp18 = sub nuw nsw i64 %indvars.iv148, %tmp10
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%tmp19 = sext i32 %add5 to i64
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%tmp20 = add nsw i64 %tmp19, 1
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%tmp21 = or i64 %indvars.iv148, 1
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%tmp22 = or i64 %tmp18, 1
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%tmp23 = add nsw i64 %tmp19, 2
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%tmp24 = or i64 %indvars.iv148, 2
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%tmp25 = or i64 %tmp18, 2
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%tmp26 = add nsw i64 %tmp19, 3
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%tmp27 = or i64 %indvars.iv148, 3
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%tmp28 = or i64 %tmp18, 3
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br label %for.body9
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for.body9: ; preds = %for.inc45.for.body9_crit_edge, %for.body4
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%tmp29 = phi %struct.ImageParameters* [ %tmp15, %for.body4 ], [ %.pre, %for.inc45.for.body9_crit_edge ]
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%indvars.iv145 = phi i64 [ %tmp9, %for.body4 ], [ %indvars.iv.next146, %for.inc45.for.body9_crit_edge ]
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%m.2124 = phi i32 [ %m.1126, %for.body4 ], [ %m.3, %for.inc45.for.body9_crit_edge ]
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%opix_x = getelementptr inbounds %struct.ImageParameters, %struct.ImageParameters* %tmp29, i64 0, i32 0
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%tmp30 = load i32, i32* %opix_x, align 4
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%tmp31 = trunc i64 %indvars.iv145 to i32
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%add10 = add nsw i32 %tmp30, %tmp31
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tail call void @LumaPrediction4x4(i32 %tmp31, i32 %tmp17, i32 0, i32 0, i32 0, i16 signext 0, i16 signext 0) #3
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%tmp32 = load i16**, i16*** @a, align 8
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%tmp33 = load %struct.ImageParameters*, %struct.ImageParameters** @c, align 8
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%tmp34 = sub nuw nsw i64 %indvars.iv145, %tmp9
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%tmp35 = sext i32 %add10 to i64
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br label %for.cond14.preheader
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for.cond14.preheader: ; preds = %for.body9
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%arrayidx = getelementptr inbounds i16*, i16** %tmp32, i64 %tmp19
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%tmp36 = load i16*, i16** %arrayidx, align 8
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%arrayidx20 = getelementptr inbounds i16, i16* %tmp36, i64 %tmp35
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%arrayidx26 = getelementptr inbounds %struct.ImageParameters, %struct.ImageParameters* %tmp33, i64 0, i32 2, i64 %indvars.iv148, i64 %indvars.iv145
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%arrayidx35 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 %tmp18, i64 %tmp34
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%tmp37 = bitcast i16* %arrayidx20 to <4 x i16>*
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%tmp38 = load <4 x i16>, <4 x i16>* %tmp37, align 2
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%tmp39 = zext <4 x i16> %tmp38 to <4 x i32>
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%tmp40 = bitcast i16* %arrayidx26 to <4 x i16>*
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%tmp41 = load <4 x i16>, <4 x i16>* %tmp40, align 2
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%tmp42 = zext <4 x i16> %tmp41 to <4 x i32>
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%tmp43 = sub nsw <4 x i32> %tmp39, %tmp42
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%tmp44 = bitcast i32* %arrayidx35 to <4 x i32>*
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store <4 x i32> %tmp43, <4 x i32>* %tmp44, align 16
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store <4 x i32> %tmp43, <4 x i32>* bitcast ([6 x i32]* @d to <4 x i32>*), align 16
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%arrayidx.1 = getelementptr inbounds i16*, i16** %tmp32, i64 %tmp20
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%tmp45 = load i16*, i16** %arrayidx.1, align 8
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%arrayidx20.1 = getelementptr inbounds i16, i16* %tmp45, i64 %tmp35
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%arrayidx26.1 = getelementptr inbounds %struct.ImageParameters, %struct.ImageParameters* %tmp33, i64 0, i32 2, i64 %tmp21, i64 %indvars.iv145
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%arrayidx35.1 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 %tmp22, i64 %tmp34
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%tmp46 = bitcast i16* %arrayidx20.1 to <4 x i16>*
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%tmp47 = load <4 x i16>, <4 x i16>* %tmp46, align 2
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%tmp48 = zext <4 x i16> %tmp47 to <4 x i32>
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%tmp49 = bitcast i16* %arrayidx26.1 to <4 x i16>*
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%tmp50 = load <4 x i16>, <4 x i16>* %tmp49, align 2
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%tmp51 = zext <4 x i16> %tmp50 to <4 x i32>
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%tmp52 = sub nsw <4 x i32> %tmp48, %tmp51
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%tmp53 = bitcast i32* %arrayidx35.1 to <4 x i32>*
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store <4 x i32> %tmp52, <4 x i32>* %tmp53, align 16
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store <4 x i32> %tmp52, <4 x i32>* bitcast (i32* getelementptr inbounds ([6 x i32], [6 x i32]* @d, i64 0, i64 4) to <4 x i32>*), align 16
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%arrayidx.2 = getelementptr inbounds i16*, i16** %tmp32, i64 %tmp23
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%tmp54 = load i16*, i16** %arrayidx.2, align 8
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%arrayidx20.2 = getelementptr inbounds i16, i16* %tmp54, i64 %tmp35
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%arrayidx26.2 = getelementptr inbounds %struct.ImageParameters, %struct.ImageParameters* %tmp33, i64 0, i32 2, i64 %tmp24, i64 %indvars.iv145
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%arrayidx35.2 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 %tmp25, i64 %tmp34
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%tmp55 = bitcast i16* %arrayidx20.2 to <4 x i16>*
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%tmp56 = load <4 x i16>, <4 x i16>* %tmp55, align 2
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%tmp57 = zext <4 x i16> %tmp56 to <4 x i32>
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%tmp58 = bitcast i16* %arrayidx26.2 to <4 x i16>*
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%tmp59 = load <4 x i16>, <4 x i16>* %tmp58, align 2
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%tmp60 = zext <4 x i16> %tmp59 to <4 x i32>
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%tmp61 = sub nsw <4 x i32> %tmp57, %tmp60
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%tmp62 = bitcast i32* %arrayidx35.2 to <4 x i32>*
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store <4 x i32> %tmp61, <4 x i32>* %tmp62, align 16
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store <4 x i32> %tmp61, <4 x i32>* bitcast (i32* getelementptr ([6 x i32], [6 x i32]* @d, i64 1, i64 2) to <4 x i32>*), align 16
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%arrayidx.3 = getelementptr inbounds i16*, i16** %tmp32, i64 %tmp26
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%tmp63 = load i16*, i16** %arrayidx.3, align 8
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%arrayidx20.3 = getelementptr inbounds i16, i16* %tmp63, i64 %tmp35
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%arrayidx26.3 = getelementptr inbounds %struct.ImageParameters, %struct.ImageParameters* %tmp33, i64 0, i32 2, i64 %tmp27, i64 %indvars.iv145
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%arrayidx35.3 = getelementptr inbounds [8 x [8 x i32]], [8 x [8 x i32]]* %n, i64 0, i64 %tmp28, i64 %tmp34
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%tmp64 = bitcast i16* %arrayidx20.3 to <4 x i16>*
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%tmp65 = load <4 x i16>, <4 x i16>* %tmp64, align 2
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%tmp66 = zext <4 x i16> %tmp65 to <4 x i32>
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%tmp67 = bitcast i16* %arrayidx26.3 to <4 x i16>*
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%tmp68 = load <4 x i16>, <4 x i16>* %tmp67, align 2
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%tmp69 = zext <4 x i16> %tmp68 to <4 x i32>
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%tmp70 = sub nsw <4 x i32> %tmp66, %tmp69
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%tmp71 = bitcast i32* %arrayidx35.3 to <4 x i32>*
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store <4 x i32> %tmp70, <4 x i32>* %tmp71, align 16
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store <4 x i32> %tmp70, <4 x i32>* bitcast (i32* getelementptr ([6 x i32], [6 x i32]* @d, i64 2, i64 0) to <4 x i32>*), align 16
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%tmp72 = load %struct.InputParameters*, %struct.InputParameters** @b, align 8
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%rdopt = getelementptr inbounds %struct.InputParameters, %struct.InputParameters* %tmp72, i64 0, i32 0
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%tmp73 = load i32, i32* %rdopt, align 4
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%cmp42 = icmp eq i32 %tmp73, 0
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br i1 %cmp42, label %land.lhs.true, label %if.then
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land.lhs.true: ; preds = %for.cond14.preheader
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%Transform8x8Mode = getelementptr inbounds %struct.InputParameters, %struct.InputParameters* %tmp72, i64 0, i32 1
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%tmp74 = load i32, i32* %Transform8x8Mode, align 4
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%tobool = icmp eq i32 %tmp74, 0
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br i1 %tobool, label %if.then, label %for.inc45
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if.then: ; preds = %land.lhs.true, %for.cond14.preheader
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%call = tail call i32 @distortion4x4(i32* nonnull getelementptr inbounds ([6 x i32], [6 x i32]* @d, i64 0, i64 0)) #3
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%add44 = add nsw i32 %call, %m.2124
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br label %for.inc45
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for.inc45: ; preds = %if.then, %land.lhs.true
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%m.3 = phi i32 [ %m.2124, %land.lhs.true ], [ %add44, %if.then ]
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%cmp8 = icmp slt i64 %indvars.iv145, %tmp12
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br i1 %cmp8, label %for.inc45.for.body9_crit_edge, label %for.inc48
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for.inc45.for.body9_crit_edge: ; preds = %for.inc45
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%indvars.iv.next146 = add nsw i64 %indvars.iv145, 4
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%.pre = load %struct.ImageParameters*, %struct.ImageParameters** @c, align 8
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br label %for.body9
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for.inc48: ; preds = %for.inc45
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%m.3.lcssa = phi i32 [ %m.3, %for.inc45 ]
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%indvars.iv.next149 = add nsw i64 %indvars.iv148, 4
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%cmp3 = icmp slt i64 %indvars.iv148, %tmp14
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br i1 %cmp3, label %for.body4, label %for.end50
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for.end50: ; preds = %for.inc48
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%m.3.lcssa.lcssa = phi i32 [ %m.3.lcssa, %for.inc48 ]
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%tmp75 = load %struct.InputParameters*, %struct.InputParameters** @b, align 8
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%rdopt51 = getelementptr inbounds %struct.InputParameters, %struct.InputParameters* %tmp75, i64 0, i32 0
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%tmp76 = load i32, i32* %rdopt51, align 4
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%cmp52 = icmp eq i32 %tmp76, 0
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br i1 %cmp52, label %land.lhs.true54, label %for.inc73
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land.lhs.true54: ; preds = %for.end50
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%Transform8x8Mode55 = getelementptr inbounds %struct.InputParameters, %struct.InputParameters* %tmp75, i64 0, i32 1
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%tmp77 = load i32, i32* %Transform8x8Mode55, align 4
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%tobool56 = icmp eq i32 %tmp77, 0
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br i1 %tobool56, label %for.inc73, label %for.body61.preheader
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for.body61.preheader: ; preds = %land.lhs.true54
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Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)
Summary:
This is a resurrection of work first proposed and discussed in Aug 2015:
http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html
and initially landed (but then backed out) in Nov 2015:
http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html
The @llvm.memcpy/memmove/memset intrinsics currently have an explicit argument
which is required to be a constant integer. It represents the alignment of the
dest (and source), and so must be the minimum of the actual alignment of the
two.
This change is the first in a series that allows source and dest to each
have their own alignments by using the alignment attribute on their arguments.
In this change we:
1) Remove the alignment argument.
2) Add alignment attributes to the source & dest arguments. We, temporarily,
require that the alignments for source & dest be equal.
For example, code which used to read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 100, i32 4, i1 false)
will now read
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 100, i1 false)
Downstream users may have to update their lit tests that check for
@llvm.memcpy/memmove/memset call/declaration patterns. The following extended sed script
may help with updating the majority of your tests, but it does not catch all possible
patterns so some manual checking and updating will be required.
s~declare void @llvm\.mem(set|cpy|move)\.p([^(]*)\((.*), i32, i1\)~declare void @llvm.mem\1.p\2(\3, i1)~g
s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* \3, i8 \4, i8 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* \3, i8 \4, i16 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* \3, i8 \4, i32 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* \3, i8 \4, i64 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* \3, i8 \4, i128 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* align \6 \3, i8 \4, i8 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* align \6 \3, i8 \4, i16 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* align \6 \3, i8 \4, i32 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* align \6 \3, i8 \4, i64 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* align \6 \3, i8 \4, i128 \5, i1 \7)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* \4, i8\5* \6, i8 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* \4, i8\5* \6, i16 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* \4, i8\5* \6, i32 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* \4, i8\5* \6, i64 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* \4, i8\5* \6, i128 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* align \8 \4, i8\5* align \8 \6, i8 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* align \8 \4, i8\5* align \8 \6, i16 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* align \8 \4, i8\5* align \8 \6, i32 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* align \8 \4, i8\5* align \8 \6, i64 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* align \8 \4, i8\5* align \8 \6, i128 \7, i1 \9)~g
The remaining changes in the series will:
Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing
source and dest alignments.
Step 3) Update Clang to use the new IRBuilder API.
Step 4) Update Polly to use the new IRBuilder API.
Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API,
and those that use use MemIntrinsicInst::[get|set]Alignment() to use
getDestAlignment() and getSourceAlignment() instead.
Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the
MemIntrinsicInst::[get|set]Alignment() methods.
Reviewers: pete, hfinkel, lhames, reames, bollu
Reviewed By: reames
Subscribers: niosHD, reames, jholewinski, qcolombet, jfb, sanjoy, arsenm, dschuff, dylanmckay, mehdi_amini, sdardis, nemanjai, david2050, nhaehnle, javed.absar, sbc100, jgravelle-google, eraman, aheejin, kbarton, JDevlieghere, asb, rbar, johnrusso, simoncook, jordy.potman.lists, apazos, sabuasal, llvm-commits
Differential Revision: https://reviews.llvm.org/D41675
llvm-svn: 322965
2018-01-20 01:13:12 +08:00
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 nonnull bitcast (i32* getelementptr ([4 x i32], [4 x i32]* @e, i64 4, i64 0) to i8*), i8* align 16 %tmp1, i64 32, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 nonnull bitcast (i32* getelementptr ([4 x i32], [4 x i32]* @e, i64 6, i64 0) to i8*), i8* align 16 %tmp2, i64 32, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 nonnull bitcast (i32* getelementptr ([4 x i32], [4 x i32]* @e, i64 8, i64 0) to i8*), i8* align 16 %tmp3, i64 32, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 nonnull bitcast (i32* getelementptr ([4 x i32], [4 x i32]* @e, i64 10, i64 0) to i8*), i8* align 16 %tmp4, i64 32, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 nonnull bitcast (i32* getelementptr ([4 x i32], [4 x i32]* @e, i64 12, i64 0) to i8*), i8* align 16 %tmp5, i64 32, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 nonnull bitcast (i32* getelementptr ([4 x i32], [4 x i32]* @e, i64 14, i64 0) to i8*), i8* align 16 %tmp6, i64 32, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 nonnull bitcast (i32* getelementptr ([4 x i32], [4 x i32]* @e, i64 16, i64 0) to i8*), i8* align 16 %tmp7, i64 32, i1 false)
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 nonnull bitcast (i32* getelementptr ([4 x i32], [4 x i32]* @e, i64 18, i64 0) to i8*), i8* align 16 %tmp8, i64 32, i1 false)
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2016-02-06 02:14:24 +08:00
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%call70 = tail call i32 @distortion4x4(i32* nonnull getelementptr inbounds ([4 x i32], [4 x i32]* @e, i64 0, i64 0)) #3
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%add71 = add nsw i32 %call70, %m.3.lcssa.lcssa
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br label %for.inc73
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for.inc73: ; preds = %for.body61.preheader, %land.lhs.true54, %for.end50
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%m.4 = phi i32 [ %add71, %for.body61.preheader ], [ %m.3.lcssa.lcssa, %land.lhs.true54 ], [ %m.3.lcssa.lcssa, %for.end50 ]
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%inc74 = add nuw nsw i32 %q.0131, 1
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%exitcond156 = icmp eq i32 %inc74, 4
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br i1 %exitcond156, label %for.end75, label %for.body
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for.end75: ; preds = %for.inc73
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%m.4.lcssa = phi i32 [ %m.4, %for.inc73 ]
|
2017-04-11 04:18:21 +08:00
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call void @llvm.lifetime.end.p0i8(i64 256, i8* %tmp) #3
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2016-02-06 02:14:24 +08:00
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ret i32 %m.4.lcssa
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}
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; Function Attrs: argmemonly nounwind
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2017-04-11 04:18:21 +08:00
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
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2016-02-06 02:14:24 +08:00
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declare void @LumaPrediction4x4(i32, i32, i32, i32, i32, i16 signext, i16 signext) #2
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declare i32 @distortion4x4(i32*) #2
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; Function Attrs: argmemonly nounwind
|
Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)
Summary:
This is a resurrection of work first proposed and discussed in Aug 2015:
http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html
and initially landed (but then backed out) in Nov 2015:
http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html
The @llvm.memcpy/memmove/memset intrinsics currently have an explicit argument
which is required to be a constant integer. It represents the alignment of the
dest (and source), and so must be the minimum of the actual alignment of the
two.
This change is the first in a series that allows source and dest to each
have their own alignments by using the alignment attribute on their arguments.
In this change we:
1) Remove the alignment argument.
2) Add alignment attributes to the source & dest arguments. We, temporarily,
require that the alignments for source & dest be equal.
For example, code which used to read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 100, i32 4, i1 false)
will now read
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 100, i1 false)
Downstream users may have to update their lit tests that check for
@llvm.memcpy/memmove/memset call/declaration patterns. The following extended sed script
may help with updating the majority of your tests, but it does not catch all possible
patterns so some manual checking and updating will be required.
s~declare void @llvm\.mem(set|cpy|move)\.p([^(]*)\((.*), i32, i1\)~declare void @llvm.mem\1.p\2(\3, i1)~g
s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* \3, i8 \4, i8 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* \3, i8 \4, i16 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* \3, i8 \4, i32 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* \3, i8 \4, i64 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* \3, i8 \4, i128 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* align \6 \3, i8 \4, i8 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* align \6 \3, i8 \4, i16 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* align \6 \3, i8 \4, i32 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* align \6 \3, i8 \4, i64 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* align \6 \3, i8 \4, i128 \5, i1 \7)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* \4, i8\5* \6, i8 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* \4, i8\5* \6, i16 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* \4, i8\5* \6, i32 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* \4, i8\5* \6, i64 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* \4, i8\5* \6, i128 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* align \8 \4, i8\5* align \8 \6, i8 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* align \8 \4, i8\5* align \8 \6, i16 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* align \8 \4, i8\5* align \8 \6, i32 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* align \8 \4, i8\5* align \8 \6, i64 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* align \8 \4, i8\5* align \8 \6, i128 \7, i1 \9)~g
The remaining changes in the series will:
Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing
source and dest alignments.
Step 3) Update Clang to use the new IRBuilder API.
Step 4) Update Polly to use the new IRBuilder API.
Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API,
and those that use use MemIntrinsicInst::[get|set]Alignment() to use
getDestAlignment() and getSourceAlignment() instead.
Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the
MemIntrinsicInst::[get|set]Alignment() methods.
Reviewers: pete, hfinkel, lhames, reames, bollu
Reviewed By: reames
Subscribers: niosHD, reames, jholewinski, qcolombet, jfb, sanjoy, arsenm, dschuff, dylanmckay, mehdi_amini, sdardis, nemanjai, david2050, nhaehnle, javed.absar, sbc100, jgravelle-google, eraman, aheejin, kbarton, JDevlieghere, asb, rbar, johnrusso, simoncook, jordy.potman.lists, apazos, sabuasal, llvm-commits
Differential Revision: https://reviews.llvm.org/D41675
llvm-svn: 322965
2018-01-20 01:13:12 +08:00
|
|
|
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i1) #1
|
2016-02-06 02:14:24 +08:00
|
|
|
|
|
|
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|
; Function Attrs: argmemonly nounwind
|
2017-04-11 04:18:21 +08:00
|
|
|
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
|
2016-02-06 02:14:24 +08:00
|
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|
attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
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|
|
attributes #1 = { argmemonly nounwind }
|
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|
|
attributes #2 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
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attributes #3 = { nounwind }
|
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