eecb99c5f6
These tests rely on SCEV looking recognizing an "or" with no common bits as an "add". Add the disjoint flag to relevant or instructions in preparation for switching SCEV to use the flag instead of the ValueTracking query. The IR with disjoint flag matches what InstCombine would produce.
223 lines
12 KiB
LLVM
223 lines
12 KiB
LLVM
; 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 ptr null, align 8
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@a = common global ptr null, align 8
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@d = common global [6 x i32] zeroinitializer, align 16
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@b = common global ptr 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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call void @llvm.lifetime.start.p0(i64 256, ptr %n) #3
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%arraydecay.1 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 1, i64 0
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%arraydecay.2 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 2, i64 0
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%arraydecay.3 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 3, i64 0
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%arraydecay.4 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 4, i64 0
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%arraydecay.5 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 5, i64 0
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%arraydecay.6 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 6, i64 0
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%arraydecay.7 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 7, i64 0
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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 disjoint i32 %shl1, 4
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%tmp12 = sext i32 %tmp11 to i64
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%tmp13 = or disjoint 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 ptr, ptr @c, align 8
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%opix_y = getelementptr inbounds %struct.ImageParameters, ptr %tmp15, i64 0, i32 1
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%tmp16 = load i32, ptr %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 disjoint i64 %indvars.iv148, 1
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%tmp22 = or disjoint i64 %tmp18, 1
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%tmp23 = add nsw i64 %tmp19, 2
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%tmp24 = or disjoint i64 %indvars.iv148, 2
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%tmp25 = or disjoint i64 %tmp18, 2
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%tmp26 = add nsw i64 %tmp19, 3
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%tmp27 = or disjoint i64 %indvars.iv148, 3
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%tmp28 = or disjoint 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 ptr [ %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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%tmp30 = load i32, ptr %tmp29, 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 ptr, ptr @a, align 8
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%tmp33 = load ptr, ptr @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 ptr, ptr %tmp32, i64 %tmp19
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%tmp36 = load ptr, ptr %arrayidx, align 8
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%arrayidx20 = getelementptr inbounds i16, ptr %tmp36, i64 %tmp35
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%arrayidx26 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %indvars.iv148, i64 %indvars.iv145
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%arrayidx35 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp18, i64 %tmp34
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%tmp38 = load <4 x i16>, ptr %arrayidx20, align 2
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%tmp39 = zext <4 x i16> %tmp38 to <4 x i32>
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%tmp41 = load <4 x i16>, ptr %arrayidx26, 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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store <4 x i32> %tmp43, ptr %arrayidx35, align 16
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store <4 x i32> %tmp43, ptr @d, align 16
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%arrayidx.1 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp20
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%tmp45 = load ptr, ptr %arrayidx.1, align 8
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%arrayidx20.1 = getelementptr inbounds i16, ptr %tmp45, i64 %tmp35
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%arrayidx26.1 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp21, i64 %indvars.iv145
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%arrayidx35.1 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp22, i64 %tmp34
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%tmp47 = load <4 x i16>, ptr %arrayidx20.1, align 2
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%tmp48 = zext <4 x i16> %tmp47 to <4 x i32>
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%tmp50 = load <4 x i16>, ptr %arrayidx26.1, 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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store <4 x i32> %tmp52, ptr %arrayidx35.1, align 16
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store <4 x i32> %tmp52, ptr getelementptr inbounds ([6 x i32], ptr @d, i64 0, i64 4), align 16
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%arrayidx.2 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp23
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%tmp54 = load ptr, ptr %arrayidx.2, align 8
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%arrayidx20.2 = getelementptr inbounds i16, ptr %tmp54, i64 %tmp35
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%arrayidx26.2 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp24, i64 %indvars.iv145
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%arrayidx35.2 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp25, i64 %tmp34
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%tmp56 = load <4 x i16>, ptr %arrayidx20.2, align 2
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%tmp57 = zext <4 x i16> %tmp56 to <4 x i32>
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%tmp59 = load <4 x i16>, ptr %arrayidx26.2, 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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store <4 x i32> %tmp61, ptr %arrayidx35.2, align 16
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store <4 x i32> %tmp61, ptr getelementptr ([6 x i32], ptr @d, i64 1, i64 2), align 16
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%arrayidx.3 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp26
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%tmp63 = load ptr, ptr %arrayidx.3, align 8
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%arrayidx20.3 = getelementptr inbounds i16, ptr %tmp63, i64 %tmp35
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%arrayidx26.3 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp27, i64 %indvars.iv145
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%arrayidx35.3 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp28, i64 %tmp34
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%tmp65 = load <4 x i16>, ptr %arrayidx20.3, align 2
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%tmp66 = zext <4 x i16> %tmp65 to <4 x i32>
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%tmp68 = load <4 x i16>, ptr %arrayidx26.3, 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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store <4 x i32> %tmp70, ptr %arrayidx35.3, align 16
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store <4 x i32> %tmp70, ptr getelementptr ([6 x i32], ptr @d, i64 2, i64 0), align 16
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%tmp72 = load ptr, ptr @b, align 8
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%tmp73 = load i32, ptr %tmp72, 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, ptr %tmp72, i64 0, i32 1
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%tmp74 = load i32, ptr %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(ptr nonnull @d) #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 ptr, ptr @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 ptr, ptr @b, align 8
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%tmp76 = load i32, ptr %tmp75, 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, ptr %tmp75, i64 0, i32 1
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%tmp77 = load i32, ptr %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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call void @llvm.memcpy.p0.p0.i64(ptr align 16 nonnull getelementptr ([4 x i32], ptr @e, i64 4, i64 0), ptr align 16 %n, i64 32, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 16 nonnull getelementptr ([4 x i32], ptr @e, i64 6, i64 0), ptr align 16 %arraydecay.1, i64 32, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 16 nonnull getelementptr ([4 x i32], ptr @e, i64 8, i64 0), ptr align 16 %arraydecay.2, i64 32, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 16 nonnull getelementptr ([4 x i32], ptr @e, i64 10, i64 0), ptr align 16 %arraydecay.3, i64 32, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 16 nonnull getelementptr ([4 x i32], ptr @e, i64 12, i64 0), ptr align 16 %arraydecay.4, i64 32, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 16 nonnull getelementptr ([4 x i32], ptr @e, i64 14, i64 0), ptr align 16 %arraydecay.5, i64 32, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 16 nonnull getelementptr ([4 x i32], ptr @e, i64 16, i64 0), ptr align 16 %arraydecay.6, i64 32, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 16 nonnull getelementptr ([4 x i32], ptr @e, i64 18, i64 0), ptr align 16 %arraydecay.7, i64 32, i1 false)
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%call70 = tail call i32 @distortion4x4(ptr nonnull @e) #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 ]
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call void @llvm.lifetime.end.p0(i64 256, ptr %n) #3
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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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declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
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declare void @LumaPrediction4x4(i32, i32, i32, i32, i32, i16 signext, i16 signext) #2
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declare i32 @distortion4x4(ptr) #2
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; Function Attrs: argmemonly nounwind
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1) #1
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
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attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" "frame-pointer"="none" "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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