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