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|
; RUN: opt -O3 -S < %s | FileCheck %s
; Confirm that we do not create assumes, clone them,
; and then cause a compile-time explosion trying to
; simplify them all. Ie, this can become nearly an
; infinite-loop if things go bad.
; https://llvm.org/PR49785
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx11.0.0"
@e = global i16 0, align 2
@a = global i32 0, align 4
@c = global i32 0, align 4
@b = global i32 0, align 4
@d = global i32 0, align 4
; Not checking complete IR because it could be very
; large with vectorization and unrolling (thousands
; of lines of IR).
define void @f() #0 {
; CHECK-LABEL: @f(
;
entry:
store i32 5, i32* @c, align 4, !tbaa !3
br label %for.cond
for.cond:
%0 = load i32, i32* @c, align 4, !tbaa !3
%cmp = icmp sle i32 %0, 63
br i1 %cmp, label %for.body, label %for.end34
for.body:
store i16 9, i16* @e, align 2, !tbaa !7
br label %for.cond1
for.cond1:
%1 = load i16, i16* @e, align 2, !tbaa !7
%conv = zext i16 %1 to i32
%cmp2 = icmp sle i32 %conv, 60
br i1 %cmp2, label %for.body4, label %for.end32
for.body4:
%2 = load i16, i16* @e, align 2, !tbaa !7
%conv5 = zext i16 %2 to i32
%3 = load i32, i32* @b, align 4, !tbaa !3
%xor = xor i32 %conv5, %3
%4 = load i32, i32* @d, align 4, !tbaa !3
%cmp6 = icmp ne i32 %xor, %4
br i1 %cmp6, label %if.then, label %if.end27
if.then:
%5 = load i32, i32* @a, align 4, !tbaa !3
%conv8 = sext i32 %5 to i64
%6 = inttoptr i64 %conv8 to i8*
store i8 3, i8* %6, align 1, !tbaa !9
br label %for.cond9
for.cond9:
%7 = load i8, i8* %6, align 1, !tbaa !9
%conv10 = sext i8 %7 to i32
%cmp11 = icmp sle i32 %conv10, 32
br i1 %cmp11, label %for.body13, label %for.end26
for.body13:
%8 = load i8, i8* %6, align 1, !tbaa !9
%tobool = icmp ne i8 %8, 0
br i1 %tobool, label %if.then14, label %if.end
if.then14:
store i8 1, i8* bitcast (i32* @a to i8*), align 1, !tbaa !9
br label %for.cond15
for.cond15:
%9 = load i8, i8* bitcast (i32* @a to i8*), align 1, !tbaa !9
%conv16 = sext i8 %9 to i32
%cmp17 = icmp sle i32 %conv16, 30
br i1 %cmp17, label %for.body19, label %for.end
for.body19:
%10 = load i32, i32* @c, align 4, !tbaa !3
%cmp20 = icmp eq i32 0, %10
%conv21 = zext i1 %cmp20 to i32
%11 = load i8, i8* bitcast (i32* @a to i8*), align 1, !tbaa !9
%conv22 = sext i8 %11 to i32
%and = and i32 %conv22, %conv21
%conv23 = trunc i32 %and to i8
store i8 %conv23, i8* bitcast (i32* @a to i8*), align 1, !tbaa !9
br label %for.cond15, !llvm.loop !10
for.end:
br label %if.end
if.end:
br label %for.inc
for.inc:
%12 = load i8, i8* %6, align 1, !tbaa !9
%conv24 = sext i8 %12 to i32
%add = add nsw i32 %conv24, 1
%conv25 = trunc i32 %add to i8
store i8 %conv25, i8* %6, align 1, !tbaa !9
br label %for.cond9, !llvm.loop !12
for.end26:
br label %if.end27
if.end27:
br label %for.inc28
for.inc28:
%13 = load i16, i16* @e, align 2, !tbaa !7
%conv29 = zext i16 %13 to i32
%add30 = add nsw i32 %conv29, 1
%conv31 = trunc i32 %add30 to i16
store i16 %conv31, i16* @e, align 2, !tbaa !7
br label %for.cond1, !llvm.loop !13
for.end32:
br label %for.inc33
for.inc33:
%14 = load i32, i32* @c, align 4, !tbaa !3
%inc = add nsw i32 %14, 1
store i32 %inc, i32* @c, align 4, !tbaa !3
br label %for.cond, !llvm.loop !14
for.end34:
ret void
}
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
attributes #0 = { nounwind ssp uwtable "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+cx8,+fxsr,+mmx,+sahf,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" "tune-cpu"="generic" }
attributes #1 = { argmemonly nofree nosync nounwind willreturn }
!llvm.module.flags = !{!0, !1}
!llvm.ident = !{!2}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 7, !"PIC Level", i32 2}
!2 = !{!"clang version 13.0.0 (https://github.com/llvm/llvm-project.git 7a4abc07dd8f1d8217e482ebbf438197c1aea7f0)"}
!3 = !{!4, !4, i64 0}
!4 = !{!"int", !5, i64 0}
!5 = !{!"omnipotent char", !6, i64 0}
!6 = !{!"Simple C/C++ TBAA"}
!7 = !{!8, !8, i64 0}
!8 = !{!"short", !5, i64 0}
!9 = !{!5, !5, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}
!13 = distinct !{!13, !11}
!14 = distinct !{!14, !11}
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