2016-06-10 09:57:48 +08:00
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; RUN: llc %s -o - | FileCheck %s
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; This file checks some weird corner case in LiveRangeEdit.
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; We used to do crash when we eliminate the definition
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; of the product of splitting when the original live-range
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; has already been removed.
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; Basically, we have the following input.
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; v1 = loadimm cst
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; ...
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; = use v1
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;
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; We split the live-range like this:
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; v1 = loadimm cst
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; ...
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; v2 = copy v1
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; ...
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; = use v2
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;
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; We actually issue loadimm instead of the copy:
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; v1 = loadimm cst
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; ...
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; v2 = loadimm cst
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; ...
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; = use v2
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;
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; v1 is now dead so we remove its live-range.
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; Actually, we shrink it to empty to keep the
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; instruction around for futher remat opportunities
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; (accessbile via the origin pointer.)
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;
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; Later v2 gets remove as well (e.g., because we
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; remat it closer to its use) and the live-range
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; gets eliminated. We used to crash at this point
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; because we were looking for a VNI of origin (v1)
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; at the slot index of the definition of v2. However,
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; we do not have a VNI for v1 at this point, since the
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; live-range is now empty... crash!
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; PR27983
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source_filename = "bugpoint-output-1e29d28.bc"
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target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
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target triple = "i386-unknown-linux-gnu"
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@r = external global i32, align 4
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@k = external global i32, align 4
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@g = external global i32, align 4
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@a = external global i16, align 2
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@p = external global i32, align 4
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@n = external global i16, align 2
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@.str = external unnamed_addr constant [12 x i8], align 1
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@.str.1 = external unnamed_addr constant [13 x i8], align 1
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@s = external global i32, align 4
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@z = external global i16, align 2
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; CHECK-LABEL: fn1:
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define void @fn1() #0 {
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entry:
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br label %for.cond
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for.cond: ; preds = %cleanup100, %for.end29, %entry
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%t7.0 = phi i16 [ undef, %entry ], [ %t7.1, %for.end29 ], [ %t7.19, %cleanup100 ]
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%t9.0 = phi i32 [ undef, %entry ], [ %t9.1, %for.end29 ], [ 0, %cleanup100 ]
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%t2.0 = phi i32 [ undef, %entry ], [ undef, %for.end29 ], [ %t2.18, %cleanup100 ]
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%tmp = load i32, i32* @r, align 4
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br i1 undef, label %if.then, label %if.end7
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if.then: ; preds = %for.cond
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%tobool = icmp ne i32 %tmp, 0
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%tobool1 = icmp ne i32 %t2.0, 0
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%tmp1 = and i1 %tobool1, %tobool
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%land.ext = zext i1 %tmp1 to i32
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%tmp2 = load i32, i32* @k, align 4
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%shr = lshr i32 %land.ext, %tmp2
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%tobool4 = icmp ne i32 %shr, 0
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%or.cond = and i1 false, %tobool4
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br i1 %or.cond, label %L6, label %if.end7
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if.end7: ; preds = %if.then, %for.cond
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%t2.1 = phi i32 [ %shr, %if.then ], [ %t2.0, %for.cond ]
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%tobool8 = icmp eq i32 undef, 0
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br i1 %tobool8, label %if.end11, label %for.cond10
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for.cond10: ; preds = %for.cond10, %if.end7
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br label %for.cond10
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if.end11: ; preds = %if.end7
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%tmp3 = load i32, i32* @g, align 4
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%tmp4 = load i16, i16* @a, align 2
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%conv = sext i16 %tmp4 to i32
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%div = sdiv i32 %tmp3, %conv
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%tobool12 = icmp eq i32 %div, 0
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br i1 %tobool12, label %for.cond15, label %L5
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for.cond15: ; preds = %for.cond17, %if.end11
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%t7.1 = phi i16 [ %t7.2, %for.cond17 ], [ %t7.0, %if.end11 ]
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%t9.1 = phi i32 [ %t9.2, %for.cond17 ], [ %t9.0, %if.end11 ]
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%tobool16 = icmp eq i32 undef, 0
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br i1 %tobool16, label %for.end29, label %for.cond17
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for.cond17: ; preds = %for.cond20, %for.cond15
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%t7.2 = phi i16 [ %t7.3, %for.cond20 ], [ %t7.1, %for.cond15 ]
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%t9.2 = phi i32 [ undef, %for.cond20 ], [ %t9.1, %for.cond15 ]
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%tobool18 = icmp eq i8 undef, 0
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br i1 %tobool18, label %for.cond15, label %for.cond20
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for.cond20: ; preds = %for.cond23, %for.cond17
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%t7.3 = phi i16 [ %t7.4, %for.cond23 ], [ %t7.2, %for.cond17 ]
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%tobool21 = icmp eq i32 undef, 0
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br i1 %tobool21, label %for.cond17, label %for.cond23
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for.cond23: ; preds = %L1, %for.cond20
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%t7.4 = phi i16 [ %t7.5, %L1 ], [ %t7.3, %for.cond20 ]
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%tobool24 = icmp eq i8 undef, 0
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br i1 %tobool24, label %for.cond20, label %L1
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L1: ; preds = %cleanup100, %for.cond23
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%t7.5 = phi i16 [ %t7.19, %cleanup100 ], [ %t7.4, %for.cond23 ]
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%conv26 = sext i16 undef to i64
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br label %for.cond23
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for.end29: ; preds = %for.cond15
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br i1 undef, label %for.cond, label %for.cond32thread-pre-split
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for.cond32thread-pre-split: ; preds = %for.end29
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%.pr = load i32, i32* @p, align 4
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br label %for.cond32
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for.cond32: ; preds = %for.inc94, %for.cond32thread-pre-split
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%t7.6 = phi i16 [ %t7.1, %for.cond32thread-pre-split ], [ %t7.17, %for.inc94 ]
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%t3.4 = phi i64 [ 0, %for.cond32thread-pre-split ], [ 0, %for.inc94 ]
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%t9.6 = phi i32 [ %t9.1, %for.cond32thread-pre-split ], [ 0, %for.inc94 ]
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%t2.7 = phi i32 [ undef, %for.cond32thread-pre-split ], [ %t2.16, %for.inc94 ]
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%tobool33 = icmp eq i32 0, 0
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br i1 %tobool33, label %for.end95, label %for.body34
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for.body34: ; preds = %for.cond32
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%tobool35 = icmp eq i16 undef, 0
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br i1 %tobool35, label %for.inc94, label %if.then36
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if.then36: ; preds = %for.body34
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%tmp5 = load i16, i16* @n, align 2
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%tobool37 = icmp eq i32 undef, 0
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br i1 %tobool37, label %if.end78, label %if.then38
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if.then38: ; preds = %if.then36
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tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i64 undef)
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%tobool40 = icmp eq i32 undef, 0
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br i1 %tobool40, label %L3, label %cleanup100
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L3: ; preds = %while.end.split, %if.then38
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%t7.7 = phi i16 [ %tmp5, %if.then38 ], [ %t7.15, %while.end.split ]
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%t3.5 = phi i64 [ %t3.4, %if.then38 ], [ %t3.11, %while.end.split ]
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%t2.8 = phi i32 [ %t2.7, %if.then38 ], [ %t2.14, %while.end.split ]
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%tobool43 = icmp eq i32 undef, 0
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br i1 %tobool43, label %if.end48, label %cleanup75
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if.end48: ; preds = %L3
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tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i32 0, i32 0), i64 %t3.5)
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br i1 undef, label %if.end61, label %for.cond52.preheader
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for.cond52.preheader: ; preds = %if.end48
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%tobool57 = icmp eq i16 undef, 0
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%.130 = select i1 %tobool57, i16 -8, i16 0
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br label %if.end61
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if.end61: ; preds = %for.cond52.preheader, %if.end48
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%t7.9 = phi i16 [ %t7.7, %if.end48 ], [ %.130, %for.cond52.preheader ]
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%tobool62 = icmp eq i32 undef, 0
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br i1 %tobool62, label %if.end71, label %if.then63
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if.then63: ; preds = %if.end61
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br i1 undef, label %if.end67, label %L5
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L5: ; preds = %cleanup100.L5_crit_edge, %if.then63, %if.end11
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%.pre = phi i32 [ %.pre.pre, %cleanup100.L5_crit_edge ], [ undef, %if.then63 ], [ %tmp, %if.end11 ]
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%t7.10 = phi i16 [ %t7.19, %cleanup100.L5_crit_edge ], [ %t7.9, %if.then63 ], [ %t7.0, %if.end11 ]
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%t3.6 = phi i64 [ 0, %cleanup100.L5_crit_edge ], [ %t3.5, %if.then63 ], [ 2, %if.end11 ]
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%t9.8 = phi i32 [ 0, %cleanup100.L5_crit_edge ], [ undef, %if.then63 ], [ %t9.0, %if.end11 ]
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%t2.9 = phi i32 [ %t2.18, %cleanup100.L5_crit_edge ], [ %t2.8, %if.then63 ], [ %t2.1, %if.end11 ]
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store i32 %t9.8, i32* @s, align 4
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br label %if.end67
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if.end67: ; preds = %L5, %if.then63
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%tmp6 = phi i32 [ %.pre, %L5 ], [ undef, %if.then63 ]
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%t7.11 = phi i16 [ %t7.10, %L5 ], [ %t7.9, %if.then63 ]
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%t3.7 = phi i64 [ %t3.6, %L5 ], [ %t3.5, %if.then63 ]
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%t9.9 = phi i32 [ %t9.8, %L5 ], [ undef, %if.then63 ]
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%t2.10 = phi i32 [ %t2.9, %L5 ], [ %t2.8, %if.then63 ]
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%tobool68 = icmp eq i32 %tmp6, 0
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br i1 %tobool68, label %if.end71, label %for.end95
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if.end71: ; preds = %if.end67, %if.end61
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%t7.12 = phi i16 [ %t7.11, %if.end67 ], [ %t7.9, %if.end61 ]
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%t3.8 = phi i64 [ %t3.7, %if.end67 ], [ %t3.5, %if.end61 ]
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%tobool72 = icmp eq i32 undef, 0
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br i1 %tobool72, label %cleanup75.thread128, label %if.then73
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if.then73: ; preds = %if.end71
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br label %cleanup100
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cleanup75.thread128: ; preds = %if.end71
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br label %if.end78
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cleanup75: ; preds = %L3
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br i1 false, label %for.cond98, label %for.end95
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if.end78: ; preds = %cleanup75.thread128, %if.then36
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%t7.14 = phi i16 [ %tmp5, %if.then36 ], [ 0, %cleanup75.thread128 ]
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%t3.10 = phi i64 [ %t3.4, %if.then36 ], [ %t3.8, %cleanup75.thread128 ]
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%t9.12 = phi i32 [ %t9.6, %if.then36 ], [ undef, %cleanup75.thread128 ]
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%t2.13 = phi i32 [ %t2.7, %if.then36 ], [ undef, %cleanup75.thread128 ]
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store i16 %t7.14, i16* @z, align 2
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br label %L6
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L6: ; preds = %if.end78, %if.then
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%t7.15 = phi i16 [ %t7.0, %if.then ], [ %t7.14, %if.end78 ]
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%t3.11 = phi i64 [ 2, %if.then ], [ %t3.10, %if.end78 ]
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%t9.13 = phi i32 [ %t9.0, %if.then ], [ %t9.12, %if.end78 ]
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%t2.14 = phi i32 [ %shr, %if.then ], [ %t2.13, %if.end78 ]
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br i1 undef, label %while.condthread-pre-split, label %for.inc94
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while.condthread-pre-split: ; preds = %L6
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%tobool83 = icmp eq i32 undef, 0
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br i1 %tobool83, label %while.end.split, label %while.cond
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while.cond: ; preds = %while.cond, %while.condthread-pre-split
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br label %while.cond
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while.end.split: ; preds = %while.condthread-pre-split
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%tobool84 = icmp eq i16 undef, 0
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br i1 %tobool84, label %for.inc94, label %L3
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for.inc94: ; preds = %while.end.split, %L6, %for.body34
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%t7.17 = phi i16 [ %t7.6, %for.body34 ], [ %t7.15, %L6 ], [ %t7.15, %while.end.split ]
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%t2.16 = phi i32 [ %t2.7, %for.body34 ], [ %t2.14, %L6 ], [ %t2.14, %while.end.split ]
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store i32 undef, i32* @p, align 4
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br label %for.cond32
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for.end95: ; preds = %cleanup75, %if.end67, %for.cond32
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%t7.18 = phi i16 [ %t7.6, %for.cond32 ], [ %t7.7, %cleanup75 ], [ %t7.11, %if.end67 ]
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%t2.17 = phi i32 [ %t2.7, %for.cond32 ], [ %t2.8, %cleanup75 ], [ %t2.10, %if.end67 ]
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%tobool96 = icmp eq i32 undef, 0
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br i1 %tobool96, label %cleanup100, label %for.cond98
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for.cond98: ; preds = %for.cond98, %for.end95, %cleanup75
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br label %for.cond98
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cleanup100: ; preds = %for.end95, %if.then73, %if.then38
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%t7.19 = phi i16 [ %t7.18, %for.end95 ], [ %tmp5, %if.then38 ], [ %t7.12, %if.then73 ]
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%t2.18 = phi i32 [ %t2.17, %for.end95 ], [ %t2.7, %if.then38 ], [ undef, %if.then73 ]
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switch i32 undef, label %unreachable [
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i32 0, label %for.cond
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i32 17, label %L1
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i32 7, label %cleanup100.L5_crit_edge
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]
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cleanup100.L5_crit_edge: ; preds = %cleanup100
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%.pre.pre = load i32, i32* @r, align 4
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br label %L5
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unreachable: ; preds = %cleanup100
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unreachable
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}
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; Function Attrs: nounwind
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declare void @printf(i8* nocapture readonly, ...) #1
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2019-12-25 08:11:33 +08:00
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attributes #0 = { noreturn nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind "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"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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