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1; PR26374: Check no stack slots are allocated for vregs which have no real reference.2; RUN: llc < %s | FileCheck %s3target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"4target triple = "x86_64-unknown-linux-gnu"5 6%struct.ImageParameters = type { i32, i32, [0 x [16 x i16]] }7%struct.InputParameters = type { i32, i32 }8 9@c = common global ptr null, align 810@a = common global ptr null, align 811@d = common global [6 x i32] zeroinitializer, align 1612@b = common global ptr null, align 813@e = common global [4 x i32] zeroinitializer, align 1614 15; It is not easy to check there is no unused holes in stack allocated for spills,16; so simply check the size of stack allocated cannot exceed 350.17; (408 is used before the fix for PR26374. 344 is used after the fix).18;19; CHECK-LABEL: @fn20; CHECK: subq {{\$3[0-4][0-9]}}, %rsp21 22; Function Attrs: nounwind uwtable23define i32 @fn() #0 {24entry:25 %n = alloca [8 x [8 x i32]], align 1626 call void @llvm.lifetime.start.p0(i64 256, ptr %n) #327 %arraydecay.1 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 1, i64 028 %arraydecay.2 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 2, i64 029 %arraydecay.3 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 3, i64 030 %arraydecay.4 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 4, i64 031 %arraydecay.5 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 5, i64 032 %arraydecay.6 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 6, i64 033 %arraydecay.7 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 7, i64 034 br label %for.body35 36for.body: ; preds = %for.inc73, %entry37 %q.0131 = phi i32 [ 0, %entry ], [ %inc74, %for.inc73 ]38 %m.0130 = phi i32 [ 0, %entry ], [ %m.4, %for.inc73 ]39 %div = sdiv i32 %q.0131, 240 %shl = shl i32 %div, 341 %rem = srem i32 %q.0131, 242 %shl1 = shl nsw i32 %rem, 343 %tmp9 = sext i32 %shl1 to i6444 %tmp10 = sext i32 %shl to i6445 %tmp11 = or disjoint i32 %shl1, 446 %tmp12 = sext i32 %tmp11 to i6447 %tmp13 = or disjoint i32 %shl, 448 %tmp14 = sext i32 %tmp13 to i6449 br label %for.body450 51for.body4: ; preds = %for.inc48, %for.body52 %indvars.iv148 = phi i64 [ %tmp10, %for.body ], [ %indvars.iv.next149, %for.inc48 ]53 %m.1126 = phi i32 [ %m.0130, %for.body ], [ %m.3.lcssa, %for.inc48 ]54 %tmp15 = load ptr, ptr @c, align 855 %opix_y = getelementptr inbounds %struct.ImageParameters, ptr %tmp15, i64 0, i32 156 %tmp16 = load i32, ptr %opix_y, align 457 %tmp17 = trunc i64 %indvars.iv148 to i3258 %add5 = add nsw i32 %tmp16, %tmp1759 %tmp18 = sub nuw nsw i64 %indvars.iv148, %tmp1060 %tmp19 = sext i32 %add5 to i6461 %tmp20 = add nsw i64 %tmp19, 162 %tmp21 = or disjoint i64 %indvars.iv148, 163 %tmp22 = or disjoint i64 %tmp18, 164 %tmp23 = add nsw i64 %tmp19, 265 %tmp24 = or disjoint i64 %indvars.iv148, 266 %tmp25 = or disjoint i64 %tmp18, 267 %tmp26 = add nsw i64 %tmp19, 368 %tmp27 = or disjoint i64 %indvars.iv148, 369 %tmp28 = or disjoint i64 %tmp18, 370 br label %for.body971 72for.body9: ; preds = %for.inc45.for.body9_crit_edge, %for.body473 %tmp29 = phi ptr [ %tmp15, %for.body4 ], [ %.pre, %for.inc45.for.body9_crit_edge ]74 %indvars.iv145 = phi i64 [ %tmp9, %for.body4 ], [ %indvars.iv.next146, %for.inc45.for.body9_crit_edge ]75 %m.2124 = phi i32 [ %m.1126, %for.body4 ], [ %m.3, %for.inc45.for.body9_crit_edge ]76 %tmp30 = load i32, ptr %tmp29, align 477 %tmp31 = trunc i64 %indvars.iv145 to i3278 %add10 = add nsw i32 %tmp30, %tmp3179 tail call void @LumaPrediction4x4(i32 %tmp31, i32 %tmp17, i32 0, i32 0, i32 0, i16 signext 0, i16 signext 0) #380 %tmp32 = load ptr, ptr @a, align 881 %tmp33 = load ptr, ptr @c, align 882 %tmp34 = sub nuw nsw i64 %indvars.iv145, %tmp983 %tmp35 = sext i32 %add10 to i6484 br label %for.cond14.preheader85 86for.cond14.preheader: ; preds = %for.body987 %arrayidx = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp1988 %tmp36 = load ptr, ptr %arrayidx, align 889 %arrayidx20 = getelementptr inbounds i16, ptr %tmp36, i64 %tmp3590 %arrayidx26 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %indvars.iv148, i64 %indvars.iv14591 %arrayidx35 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp18, i64 %tmp3492 %tmp38 = load <4 x i16>, ptr %arrayidx20, align 293 %tmp39 = zext <4 x i16> %tmp38 to <4 x i32>94 %tmp41 = load <4 x i16>, ptr %arrayidx26, align 295 %tmp42 = zext <4 x i16> %tmp41 to <4 x i32>96 %tmp43 = sub nsw <4 x i32> %tmp39, %tmp4297 store <4 x i32> %tmp43, ptr %arrayidx35, align 1698 store <4 x i32> %tmp43, ptr @d, align 1699 %arrayidx.1 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp20100 %tmp45 = load ptr, ptr %arrayidx.1, align 8101 %arrayidx20.1 = getelementptr inbounds i16, ptr %tmp45, i64 %tmp35102 %arrayidx26.1 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp21, i64 %indvars.iv145103 %arrayidx35.1 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp22, i64 %tmp34104 %tmp47 = load <4 x i16>, ptr %arrayidx20.1, align 2105 %tmp48 = zext <4 x i16> %tmp47 to <4 x i32>106 %tmp50 = load <4 x i16>, ptr %arrayidx26.1, align 2107 %tmp51 = zext <4 x i16> %tmp50 to <4 x i32>108 %tmp52 = sub nsw <4 x i32> %tmp48, %tmp51109 store <4 x i32> %tmp52, ptr %arrayidx35.1, align 16110 store <4 x i32> %tmp52, ptr getelementptr inbounds ([6 x i32], ptr @d, i64 0, i64 4), align 16111 %arrayidx.2 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp23112 %tmp54 = load ptr, ptr %arrayidx.2, align 8113 %arrayidx20.2 = getelementptr inbounds i16, ptr %tmp54, i64 %tmp35114 %arrayidx26.2 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp24, i64 %indvars.iv145115 %arrayidx35.2 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp25, i64 %tmp34116 %tmp56 = load <4 x i16>, ptr %arrayidx20.2, align 2117 %tmp57 = zext <4 x i16> %tmp56 to <4 x i32>118 %tmp59 = load <4 x i16>, ptr %arrayidx26.2, align 2119 %tmp60 = zext <4 x i16> %tmp59 to <4 x i32>120 %tmp61 = sub nsw <4 x i32> %tmp57, %tmp60121 store <4 x i32> %tmp61, ptr %arrayidx35.2, align 16122 store <4 x i32> %tmp61, ptr getelementptr ([6 x i32], ptr @d, i64 1, i64 2), align 16123 %arrayidx.3 = getelementptr inbounds ptr, ptr %tmp32, i64 %tmp26124 %tmp63 = load ptr, ptr %arrayidx.3, align 8125 %arrayidx20.3 = getelementptr inbounds i16, ptr %tmp63, i64 %tmp35126 %arrayidx26.3 = getelementptr inbounds %struct.ImageParameters, ptr %tmp33, i64 0, i32 2, i64 %tmp27, i64 %indvars.iv145127 %arrayidx35.3 = getelementptr inbounds [8 x [8 x i32]], ptr %n, i64 0, i64 %tmp28, i64 %tmp34128 %tmp65 = load <4 x i16>, ptr %arrayidx20.3, align 2129 %tmp66 = zext <4 x i16> %tmp65 to <4 x i32>130 %tmp68 = load <4 x i16>, ptr %arrayidx26.3, align 2131 %tmp69 = zext <4 x i16> %tmp68 to <4 x i32>132 %tmp70 = sub nsw <4 x i32> %tmp66, %tmp69133 store <4 x i32> %tmp70, ptr %arrayidx35.3, align 16134 store <4 x i32> %tmp70, ptr getelementptr ([6 x i32], ptr @d, i64 2, i64 0), align 16135 %tmp72 = load ptr, ptr @b, align 8136 %tmp73 = load i32, ptr %tmp72, align 4137 %cmp42 = icmp eq i32 %tmp73, 0138 br i1 %cmp42, label %land.lhs.true, label %if.then139 140land.lhs.true: ; preds = %for.cond14.preheader141 %Transform8x8Mode = getelementptr inbounds %struct.InputParameters, ptr %tmp72, i64 0, i32 1142 %tmp74 = load i32, ptr %Transform8x8Mode, align 4143 %tobool = icmp eq i32 %tmp74, 0144 br i1 %tobool, label %if.then, label %for.inc45145 146if.then: ; preds = %land.lhs.true, %for.cond14.preheader147 %call = tail call i32 @distortion4x4(ptr nonnull @d) #3148 %add44 = add nsw i32 %call, %m.2124149 br label %for.inc45150 151for.inc45: ; preds = %if.then, %land.lhs.true152 %m.3 = phi i32 [ %m.2124, %land.lhs.true ], [ %add44, %if.then ]153 %cmp8 = icmp slt i64 %indvars.iv145, %tmp12154 br i1 %cmp8, label %for.inc45.for.body9_crit_edge, label %for.inc48155 156for.inc45.for.body9_crit_edge: ; preds = %for.inc45157 %indvars.iv.next146 = add nsw i64 %indvars.iv145, 4158 %.pre = load ptr, ptr @c, align 8159 br label %for.body9160 161for.inc48: ; preds = %for.inc45162 %m.3.lcssa = phi i32 [ %m.3, %for.inc45 ]163 %indvars.iv.next149 = add nsw i64 %indvars.iv148, 4164 %cmp3 = icmp slt i64 %indvars.iv148, %tmp14165 br i1 %cmp3, label %for.body4, label %for.end50166 167for.end50: ; preds = %for.inc48168 %m.3.lcssa.lcssa = phi i32 [ %m.3.lcssa, %for.inc48 ]169 %tmp75 = load ptr, ptr @b, align 8170 %tmp76 = load i32, ptr %tmp75, align 4171 %cmp52 = icmp eq i32 %tmp76, 0172 br i1 %cmp52, label %land.lhs.true54, label %for.inc73173 174land.lhs.true54: ; preds = %for.end50175 %Transform8x8Mode55 = getelementptr inbounds %struct.InputParameters, ptr %tmp75, i64 0, i32 1176 %tmp77 = load i32, ptr %Transform8x8Mode55, align 4177 %tobool56 = icmp eq i32 %tmp77, 0178 br i1 %tobool56, label %for.inc73, label %for.body61.preheader179 180for.body61.preheader: ; preds = %land.lhs.true54181 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)182 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)183 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)184 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)185 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)186 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)187 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)188 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)189 %call70 = tail call i32 @distortion4x4(ptr nonnull @e) #3190 %add71 = add nsw i32 %call70, %m.3.lcssa.lcssa191 br label %for.inc73192 193for.inc73: ; preds = %for.body61.preheader, %land.lhs.true54, %for.end50194 %m.4 = phi i32 [ %add71, %for.body61.preheader ], [ %m.3.lcssa.lcssa, %land.lhs.true54 ], [ %m.3.lcssa.lcssa, %for.end50 ]195 %inc74 = add nuw nsw i32 %q.0131, 1196 %exitcond156 = icmp eq i32 %inc74, 4197 br i1 %exitcond156, label %for.end75, label %for.body198 199for.end75: ; preds = %for.inc73200 %m.4.lcssa = phi i32 [ %m.4, %for.inc73 ]201 call void @llvm.lifetime.end.p0(i64 256, ptr %n) #3202 ret i32 %m.4.lcssa203}204 205; Function Attrs: argmemonly nounwind206declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1207 208declare void @LumaPrediction4x4(i32, i32, i32, i32, i32, i16 signext, i16 signext) #2209 210declare i32 @distortion4x4(ptr) #2211 212; Function Attrs: argmemonly nounwind213declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1) #1214 215; Function Attrs: argmemonly nounwind216declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1217 218attributes #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" "use-soft-float"="false" }219attributes #1 = { argmemonly nounwind }220attributes #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" "use-soft-float"="false" }221attributes #3 = { nounwind }222 223