; PR26374: Check no stack slots are allocated for vregs which have no real reference.
; RUN: llc < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
%struct.ImageParameters = type { i32, i32, [0 x [16 x i16]] }
%struct.InputParameters = type { i32, i32 }
@c = common global ptr null, align 8
@a = common global ptr null, align 8
@d = common global [6 x i32] zeroinitializer, align 16
@b = common global ptr null, align 8
@e = common global [4 x i32] zeroinitializer, align 16
; It is not easy to check there is no unused holes in stack allocated for spills,
; so simply check the size of stack allocated cannot exceed 350.
; (408 is used before the fix for PR26374. 344 is used after the fix).
;
; CHECK-LABEL: @fn
; CHECK: subq {{\$3[0-4][0-9]}}, %rsp
; Function Attrs: nounwind uwtable
define i32 @fn() #0 {
entry:
%n = alloca [8 x [8 x i32]], align 16
call void @llvm.lifetime.start.p0(i64 256, ptr %n) #3
%arraydecay.1 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 1, i64 0
%arraydecay.2 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 2, i64 0
%arraydecay.3 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 3, i64 0
%arraydecay.4 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 4, i64 0
%arraydecay.5 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 5, i64 0
%arraydecay.6 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 6, i64 0
%arraydecay.7 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 7, i64 0
br label %for.body
for.body: ; preds = %for.inc73, %entry
%q.0131 = phi i32 [ 0, %entry ], [ %inc74, %for.inc73 ]
%m.0130 = phi i32 [ 0, %entry ], [ %m.4, %for.inc73 ]
%div = sdiv i32 %q.0131, 2
%shl = shl i32 %div, 3
%rem = srem i32 %q.0131, 2
%shl1 = shl nsw i32 %rem, 3
%tmp9 = sext i32 %shl1 to i64
%tmp10 = sext i32 %shl to i64
%tmp11 = or i32 %shl1, 4
%tmp12 = sext i32 %tmp11 to i64
%tmp13 = or i32 %shl, 4
%tmp14 = sext i32 %tmp13 to i64
br label %for.body4
for.body4: ; preds = %for.inc48, %for.body
%indvars.iv148 = phi i64 [ %tmp10, %for.body ], [ %indvars.iv.next149, %for.inc48 ]
%m.1126 = phi i32 [ %m.0130, %for.body ], [ %m.3.lcssa, %for.inc48 ]
%tmp15 = load ptr, ptr @c, align 8
%opix_y = getelementptr inbounds %struct.ImageParameters, ptr %tmp15, i64 0, i32 1
%tmp16 = load i32, ptr %opix_y, align 4
%tmp17 = trunc i64 %indvars.iv148 to i32
%add5 = add nsw i32 %tmp16, %tmp17
%tmp18 = sub nuw nsw i64 %indvars.iv148, %tmp10
%tmp19 = sext i32 %add5 to i64
%tmp20 = add nsw i64 %tmp19, 1
%tmp21 = or i64 %indvars.iv148, 1
%tmp22 = or i64 %tmp18, 1
%tmp23 = add nsw i64 %tmp19, 2
%tmp24 = or i64 %indvars.iv148, 2
%tmp25 = or i64 %tmp18, 2
%tmp26 = add nsw i64 %tmp19, 3
%tmp27 = or i64 %indvars.iv148, 3
%tmp28 = or i64 %tmp18, 3
br label %for.body9
for.body9: ; preds = %for.inc45.for.body9_crit_edge, %for.body4
%tmp29 = phi ptr [ %tmp15, %for.body4 ], [ %.pre, %for.inc45.for.body9_crit_edge ]
%indvars.iv145 = phi i64 [ %tmp9, %for.body4 ], [ %indvars.iv.next146, %for.inc45.for.body9_crit_edge ]
%m.2124 = phi i32 [ %m.1126, %for.body4 ], [ %m.3, %for.inc45.for.body9_crit_edge ]
%tmp30 = load i32, ptr %tmp29, align 4
%tmp31 = trunc i64 %indvars.iv145 to i32
%add10 = add nsw i32 %tmp30, %tmp31
tail call void @LumaPrediction4x4(i32 %tmp31, i32 %tmp17, i32 0, i32 0, i32 0, i16 signext 0, i16 signext 0) #3
%tmp32 = load ptr, ptr @a, align 8
%tmp33 = load ptr, ptr @c, align 8
%tmp34 = sub nuw nsw i64 %indvars.iv145, %tmp9
%tmp35 = sext i32 %add10 to i64
br label %for.cond14.preheader
for.cond14.preheader: ; preds = %for.body9
%arrayidx = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp19
%tmp36 = load ptr, ptr %arrayidx, align 8
%arrayidx20 = getelementptr inbounds i16, ptr %tmp36, i64 %tmp35
%arrayidx26 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %indvars.iv148, i64 %indvars.iv145
%arrayidx35 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp18, i64 %tmp34
%tmp38 = load <4 x i16>, ptr %arrayidx20, align 2
%tmp39 = zext <4 x i16> %tmp38 to <4 x i32>
%tmp41 = load <4 x i16>, ptr %arrayidx26, align 2
%tmp42 = zext <4 x i16> %tmp41 to <4 x i32>
%tmp43 = sub nsw <4 x i32> %tmp39, %tmp42
store <4 x i32> %tmp43, ptr %arrayidx35, align 16
store <4 x i32> %tmp43, ptr @d, align 16
%arrayidx.1 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp20
%tmp45 = load ptr, ptr %arrayidx.1, align 8
%arrayidx20.1 = getelementptr inbounds i16, ptr %tmp45, i64 %tmp35
%arrayidx26.1 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp21, i64 %indvars.iv145
%arrayidx35.1 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp22, i64 %tmp34
%tmp47 = load <4 x i16>, ptr %arrayidx20.1, align 2
%tmp48 = zext <4 x i16> %tmp47 to <4 x i32>
%tmp50 = load <4 x i16>, ptr %arrayidx26.1, align 2
%tmp51 = zext <4 x i16> %tmp50 to <4 x i32>
%tmp52 = sub nsw <4 x i32> %tmp48, %tmp51
store <4 x i32> %tmp52, ptr %arrayidx35.1, align 16
store <4 x i32> %tmp52, ptr getelementptr inbounds ([6 x i32], ptr @d, i64 0, i64 4), align 16
%arrayidx.2 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp23
%tmp54 = load ptr, ptr %arrayidx.2, align 8
%arrayidx20.2 = getelementptr inbounds i16, ptr %tmp54, i64 %tmp35
%arrayidx26.2 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp24, i64 %indvars.iv145
%arrayidx35.2 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp25, i64 %tmp34
%tmp56 = load <4 x i16>, ptr %arrayidx20.2, align 2
%tmp57 = zext <4 x i16> %tmp56 to <4 x i32>
%tmp59 = load <4 x i16>, ptr %arrayidx26.2, align 2
%tmp60 = zext <4 x i16> %tmp59 to <4 x i32>
%tmp61 = sub nsw <4 x i32> %tmp57, %tmp60
store <4 x i32> %tmp61, ptr %arrayidx35.2, align 16
store <4 x i32> %tmp61, ptr getelementptr ([6 x i32], ptr @d, i64 1, i64 2), align 16
%arrayidx.3 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp26
%tmp63 = load ptr, ptr %arrayidx.3, align 8
%arrayidx20.3 = getelementptr inbounds i16, ptr %tmp63, i64 %tmp35
%arrayidx26.3 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp27, i64 %indvars.iv145
%arrayidx35.3 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp28, i64 %tmp34
%tmp65 = load <4 x i16>, ptr %arrayidx20.3, align 2
%tmp66 = zext <4 x i16> %tmp65 to <4 x i32>
%tmp68 = load <4 x i16>, ptr %arrayidx26.3, align 2
%tmp69 = zext <4 x i16> %tmp68 to <4 x i32>
%tmp70 = sub nsw <4 x i32> %tmp66, %tmp69
store <4 x i32> %tmp70, ptr %arrayidx35.3, align 16
store <4 x i32> %tmp70, ptr getelementptr ([6 x i32], ptr @d, i64 2, i64 0), align 16
%tmp72 = load ptr, ptr @b, align 8
%tmp73 = load i32, ptr %tmp72, align 4
%cmp42 = icmp eq i32 %tmp73, 0
br i1 %cmp42, label %land.lhs.true, label %if.then
land.lhs.true: ; preds = %for.cond14.preheader
%Transform8x8Mode = getelementptr inbounds %struct.InputParameters, ptr %tmp72, i64 0, i32 1
%tmp74 = load i32, ptr %Transform8x8Mode, align 4
%tobool = icmp eq i32 %tmp74, 0
br i1 %tobool, label %if.then, label %for.inc45
if.then: ; preds = %land.lhs.true, %for.cond14.preheader
%call = tail call i32 @distortion4x4(ptr nonnull @d) #3
%add44 = add nsw i32 %call, %m.2124
br label %for.inc45
for.inc45: ; preds = %if.then, %land.lhs.true
%m.3 = phi i32 [ %m.2124, %land.lhs.true ], [ %add44, %if.then ]
%cmp8 = icmp slt i64 %indvars.iv145, %tmp12
br i1 %cmp8, label %for.inc45.for.body9_crit_edge, label %for.inc48
for.inc45.for.body9_crit_edge: ; preds = %for.inc45
%indvars.iv.next146 = add nsw i64 %indvars.iv145, 4
%.pre = load ptr, ptr @c, align 8
br label %for.body9
for.inc48: ; preds = %for.inc45
%m.3.lcssa = phi i32 [ %m.3, %for.inc45 ]
%indvars.iv.next149 = add nsw i64 %indvars.iv148, 4
%cmp3 = icmp slt i64 %indvars.iv148, %tmp14
br i1 %cmp3, label %for.body4, label %for.end50
for.end50: ; preds = %for.inc48
%m.3.lcssa.lcssa = phi i32 [ %m.3.lcssa, %for.inc48 ]
%tmp75 = load ptr, ptr @b, align 8
%tmp76 = load i32, ptr %tmp75, align 4
%cmp52 = icmp eq i32 %tmp76, 0
br i1 %cmp52, label %land.lhs.true54, label %for.inc73
land.lhs.true54: ; preds = %for.end50
%Transform8x8Mode55 = getelementptr inbounds %struct.InputParameters, ptr %tmp75, i64 0, i32 1
%tmp77 = load i32, ptr %Transform8x8Mode55, align 4
%tobool56 = icmp eq i32 %tmp77, 0
br i1 %tobool56, label %for.inc73, label %for.body61.preheader
for.body61.preheader: ; preds = %land.lhs.true54
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)
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)
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)
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)
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)
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)
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)
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)
%call70 = tail call i32 @distortion4x4(ptr nonnull @e) #3
%add71 = add nsw i32 %call70, %m.3.lcssa.lcssa
br label %for.inc73
for.inc73: ; preds = %for.body61.preheader, %land.lhs.true54, %for.end50
%m.4 = phi i32 [ %add71, %for.body61.preheader ], [ %m.3.lcssa.lcssa, %land.lhs.true54 ], [ %m.3.lcssa.lcssa, %for.end50 ]
%inc74 = add nuw nsw i32 %q.0131, 1
%exitcond156 = icmp eq i32 %inc74, 4
br i1 %exitcond156, label %for.end75, label %for.body
for.end75: ; preds = %for.inc73
%m.4.lcssa = phi i32 [ %m.4, %for.inc73 ]
call void @llvm.lifetime.end.p0(i64 256, ptr %n) #3
ret i32 %m.4.lcssa
}
; Function Attrs: argmemonly nounwind
declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
declare void @LumaPrediction4x4(i32, i32, i32, i32, i32, i16 signext, i16 signext) #2
declare i32 @distortion4x4(ptr) #2
; Function Attrs: argmemonly nounwind
declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1) #1
; Function Attrs: argmemonly nounwind
declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
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" }
attributes #1 = { argmemonly nounwind }
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" }
attributes #3 = { nounwind }