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[ScopDetect] Reject loop with multiple exit blocks. 

The current statement domain derivation algorithm does not (always)
consider that different exit blocks of a loop can have different
conditions to be reached.

From the code

      for (int i = n; ; i-=2) {
        if (i <= 0) goto even;
        if (i <= 1) goto odd;
        A[i] = i;
      }
    even:
      A[0] = 42;
      return;
    odd:
      A[1] = 21;
      return;

Polly currently derives the following domains:

        Stmt_even_critedge
            Domain :=
                [n] -> { Stmt_even_critedge[] };
        Stmt_odd
            Domain :=
                [n] -> { Stmt_odd[] : (1 + n) mod 2 = 0 and n > 0 };

while the domain for the odd case is correct, Stmt_even is assumed to be
executed unconditionally, which is obviously wrong. While projecting out
the loop dimension in `adjustDomainDimensions`, it does not consider
that there are other exit condition that have matched before.

I don't know a how to fix this without changing a lot of code. Therefore
This patch rejects loops with multiple exist blocks to fix the
miscompile of test-suite's uuencode.

The odd condition is transformed by LLVM to

    %cmp1 = icmp eq i64 %indvars.iv, 1

such that the project_out in adjustDomainDimensions() indeed only
matches for odd n (using this condition only, we'd have an infinite loop
otherwise).

The even condition manifests as

    %cmp = icmp slt i64 %indvars.iv, 3

Because buildDomainsWithBranchConstraints() does not consider other exit
conditions, it has to assume that the induction variable will eventually
be lower than 3 and taking this exit.

IMHO we need to reuse the algorithm that determines the number of
iterations (addLoopBoundsToHeaderDomain) to determine which exit
condition applies first. It has to happen in
buildDomainsWithBranchConstraints() because the result will need to
propagate to successor BBs. Currently addLoopBoundsToHeaderDomain() just
look for union of all backedge conditions (which means leaving not the
loop here). The patch in llvm.org/PR35465 changes it to look for exit
conditions instead. This is required because there might be other exit
conditions that do not alternatively go back to the loop header.

Differential Revision: https://reviews.llvm.org/D45649

llvm-svn: 330858
This commit is contained in:
Michael Kruse 2018-04-25 18:53:33 +00:00
parent d8803d3d92
commit beffdb9daa
15 changed files with 520 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
polly/include/polly/ScopDetectionDiagnostic.h
View File

@ -90,6 +90,7 @@ enum class RejectReasonKind {
LoopBound,
LoopHasNoExit,
LoopHasMultipleExits,
LoopOnlySomeLatches,
FuncCall,
@ -584,6 +585,34 @@ public:
//@}
};
//===----------------------------------------------------------------------===//
/// Captures errors when a loop has multiple exists.
class ReportLoopHasMultipleExits : public RejectReason {
/// The loop that has multiple exits.
Loop *L;
const DebugLoc Loc;
public:
ReportLoopHasMultipleExits(Loop *L)
: RejectReason(RejectReasonKind::LoopHasMultipleExits), L(L),
Loc(L->getStartLoc()) {}
/// @name LLVM-RTTI interface
//@{
static bool classof(const RejectReason *RR);
//@}
/// @name RejectReason interface
//@{
std::string getRemarkName() const override;
const Value *getRemarkBB() const override;
std::string getMessage() const override;
const DebugLoc &getDebugLoc() const override;
std::string getEndUserMessage() const override;
//@}
};
//===----------------------------------------------------------------------===//
/// Captures errors when not all loop latches are part of the scop.
class ReportLoopOnlySomeLatches : public RejectReason {

12
polly/lib/Analysis/ScopDetection.cpp
View File

@ -1297,6 +1297,18 @@ bool ScopDetection::isValidLoop(Loop *L, DetectionContext &Context) const {
if (!hasExitingBlocks(L))
return invalid<ReportLoopHasNoExit>(Context, /*Assert=*/true, L);
// The algorithm for domain construction assumes that loops has only a single
// exit block (and hence corresponds to a subregion). Note that we cannot use
// L->getExitBlock() because it does not check whether all exiting edges point
// to the same BB.
SmallVector<BasicBlock *, 4> ExitBlocks;
L->getExitBlocks(ExitBlocks);
BasicBlock *TheExitBlock = ExitBlocks[0];
for (BasicBlock *ExitBB : ExitBlocks) {
if (TheExitBlock != ExitBB)
return invalid<ReportLoopHasMultipleExits>(Context, /*Assert=*/true, L);
}
if (canUseISLTripCount(L, Context))
return true;

26
polly/lib/Analysis/ScopDetectionDiagnostic.cpp
View File

@ -71,6 +71,7 @@ Statistic RejectStatistics[] = {
SCOP_STAT(LastAffFunc, ""),
SCOP_STAT(LoopBound, "Uncomputable loop bounds"),
SCOP_STAT(LoopHasNoExit, "Loop without exit"),
SCOP_STAT(LoopHasMultipleExits, "Loop with multiple exits"),
SCOP_STAT(LoopOnlySomeLatches, "Not all loop latches in scop"),
SCOP_STAT(FuncCall, "Function call with side effects"),
SCOP_STAT(NonSimpleMemoryAccess,
@ -495,6 +496,31 @@ std::string ReportLoopHasNoExit::getEndUserMessage() const {
return "Loop cannot be handled because it has no exit.";
}
//===----------------------------------------------------------------------===//
// ReportLoopHasMultipleExits.
std::string ReportLoopHasMultipleExits::getRemarkName() const {
return "ReportLoopHasMultipleExits";
}
const Value *ReportLoopHasMultipleExits::getRemarkBB() const {
return L->getHeader();
}
std::string ReportLoopHasMultipleExits::getMessage() const {
return "Loop " + L->getHeader()->getName() + " has multiple exits.";
}
bool ReportLoopHasMultipleExits::classof(const RejectReason *RR) {
return RR->getKind() == RejectReasonKind::LoopHasMultipleExits;
}
const DebugLoc &ReportLoopHasMultipleExits::getDebugLoc() const { return Loc; }
std::string ReportLoopHasMultipleExits::getEndUserMessage() const {
return "Loop cannot be handled because it has multiple exits.";
}
//===----------------------------------------------------------------------===//
// ReportLoopOnlySomeLatches

6
polly/test/ScopDetect/index_from_unpredictable_loop.ll
View File

@ -1,6 +1,12 @@
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s --check-prefix=AFFINE
; RUN: opt %loadPolly -polly-scops -polly-allow-nonaffine -analyze < %s | FileCheck %s --check-prefix=NONAFFINE
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
; The loop for.body => for.inc has an unpredictable iteration count could due to
; the undef start value that it is compared to. Therefore the array element
; %arrayidx101 that depends on that exit value cannot be affine.

6
polly/test/ScopDetect/index_from_unpredictable_loop2.ll
View File

@ -1,6 +1,12 @@
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s --check-prefix=AFFINE
; RUN: opt %loadPolly -polly-scops -polly-allow-nonaffine -analyze < %s | FileCheck %s --check-prefix=NONAFFINE
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
; The loop for.body => for.inc has an unpredictable iteration count could due to
; the undef start value that it is compared to. Therefore the array element
; %arrayidx101 that depends on that exit value cannot be affine.

386
polly/test/ScopDetectionDiagnostics/loop_has_multiple_exits.ll Normal file
View File

@ -0,0 +1,386 @@
; RUN: opt %loadPolly -pass-remarks-missed="polly-detect" -polly-detect-track-failures -polly-detect -disable-output 2>&1 < %s | FileCheck %s -match-full-lines
;
; Derived from test-suite/MultiSource/Benchmarks/BitBench/uuencode/uuencode.c
;
; CHECK: remark: uuencode.c:75:18: The following errors keep this region from being a Scop.
; CHECK: remark: uuencode.c:83:3: Loop cannot be handled because it has multiple exits.
; CHECK: remark: uuencode.c:95:21: Invalid Scop candidate ends here.
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @encode_line(i8* nocapture readonly %input, i32 %offset, i32 %octets, i8* nocapture %line) !dbg !9 {
entry:
br label %entry.split, !dbg !26
entry.split: ; preds = %entry
call void @llvm.dbg.value(metadata i8* %input, metadata !17, metadata !DIExpression()), !dbg !26
call void @llvm.dbg.value(metadata i32 %offset, metadata !18, metadata !DIExpression()), !dbg !27
call void @llvm.dbg.value(metadata i32 %octets, metadata !19, metadata !DIExpression()), !dbg !28
call void @llvm.dbg.value(metadata i8* %line, metadata !20, metadata !DIExpression()), !dbg !29
call void @llvm.dbg.value(metadata i32 0, metadata !21, metadata !DIExpression()), !dbg !30
%conv = trunc i32 %octets to i8, !dbg !31
call void @llvm.dbg.value(metadata i8 %conv, metadata !32, metadata !DIExpression()), !dbg !37
%tmp = and i8 %conv, 63, !dbg !39
%addconv.i = add nuw nsw i8 %tmp, 32, !dbg !40
store i8 %addconv.i, i8* %line, align 1, !dbg !41, !tbaa !42
call void @llvm.dbg.value(metadata i32 1, metadata !21, metadata !DIExpression()), !dbg !30
call void @llvm.dbg.value(metadata i32 %offset, metadata !18, metadata !DIExpression()), !dbg !27
call void @llvm.dbg.value(metadata i32 %octets, metadata !19, metadata !DIExpression()), !dbg !28
%cmp220 = icmp sgt i32 %octets, 0, !dbg !45
br i1 %cmp220, label %for.body.preheader, label %for.end, !dbg !46
for.body.preheader: ; preds = %entry.split
%tmp1 = sext i32 %offset to i64, !dbg !47
br label %for.body, !dbg !47
for.body: ; preds = %if.end126, %for.body.preheader
%indvars.iv = phi i64 [ %tmp1, %for.body.preheader ], [ %indvars.iv.next, %if.end126 ]
%loffs.0223 = phi i32 [ 1, %for.body.preheader ], [ %inc49, %if.end126 ]
%octets.addr.0221 = phi i32 [ %octets, %for.body.preheader ], [ %sub, %if.end126 ]
call void @llvm.dbg.value(metadata i32 %loffs.0223, metadata !21, metadata !DIExpression()), !dbg !30
call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !18, metadata !DIExpression()), !dbg !27
call void @llvm.dbg.value(metadata i32 %octets.addr.0221, metadata !19, metadata !DIExpression()), !dbg !28
%cmp3 = icmp sgt i32 %octets.addr.0221, 2, !dbg !47
br i1 %cmp3, label %if.end126, label %if.else, !dbg !49
if.else: ; preds = %for.body
call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !18, metadata !DIExpression()), !dbg !27
call void @llvm.dbg.value(metadata i32 %loffs.0223, metadata !21, metadata !DIExpression()), !dbg !30
call void @llvm.dbg.value(metadata i32 %octets.addr.0221, metadata !19, metadata !DIExpression()), !dbg !28
br label %for.end
if.then54: ; No predecessors!
%arrayidx56 = getelementptr inbounds i8, i8* %input, i64 %indvars.iv, !dbg !50
%tmp2 = load i8, i8* %arrayidx56, align 1, !dbg !50, !tbaa !42
%tmp3 = lshr i8 %tmp2, 2, !dbg !54
call void @llvm.dbg.value(metadata i8 %tmp2, metadata !32, metadata !DIExpression(DW_OP_constu, 2, DW_OP_shra, DW_OP_stack_value)), !dbg !55
%addconv.i210 = add nuw nsw i8 %tmp3, 32, !dbg !57
call void @llvm.dbg.value(metadata i8 %addconv.i210, metadata !22, metadata !DIExpression()), !dbg !58
%inc62 = add nuw nsw i32 %loffs.0223, 1, !dbg !59
call void @llvm.dbg.value(metadata i32 %inc62, metadata !21, metadata !DIExpression()), !dbg !30
%tmp4 = zext i32 %loffs.0223 to i64, !dbg !60
%arrayidx64 = getelementptr inbounds i8, i8* %line, i64 %tmp4, !dbg !60
store i8 %addconv.i210, i8* %arrayidx64, align 1, !dbg !61, !tbaa !42
%tmp5 = load i8, i8* %arrayidx56, align 1, !dbg !62, !tbaa !42
%shl68 = shl i8 %tmp5, 4, !dbg !63
call void @llvm.dbg.value(metadata i8 %shl68, metadata !32, metadata !DIExpression()), !dbg !64
%tmp6 = and i8 %shl68, 48, !dbg !66
%addconv.i208 = add nuw nsw i8 %tmp6, 32, !dbg !67
call void @llvm.dbg.value(metadata i8 %addconv.i208, metadata !22, metadata !DIExpression()), !dbg !58
%inc72 = add nuw nsw i32 %loffs.0223, 2, !dbg !68
call void @llvm.dbg.value(metadata i32 %inc72, metadata !21, metadata !DIExpression()), !dbg !30
%tmp7 = zext i32 %inc62 to i64, !dbg !69
%arrayidx74 = getelementptr inbounds i8, i8* %line, i64 %tmp7, !dbg !69
store i8 %addconv.i208, i8* %arrayidx74, align 1, !dbg !70, !tbaa !42
%inc75 = add nuw nsw i32 %loffs.0223, 3, !dbg !71
call void @llvm.dbg.value(metadata i32 %inc75, metadata !21, metadata !DIExpression()), !dbg !30
%tmp8 = zext i32 %inc72 to i64, !dbg !72
%arrayidx77 = getelementptr inbounds i8, i8* %line, i64 %tmp8, !dbg !72
store i8 61, i8* %arrayidx77, align 1, !dbg !73, !tbaa !42
%inc78 = add nuw nsw i32 %loffs.0223, 4, !dbg !74
call void @llvm.dbg.value(metadata i32 %inc78, metadata !21, metadata !DIExpression()), !dbg !30
%tmp9 = zext i32 %inc75 to i64, !dbg !75
%arrayidx80 = getelementptr inbounds i8, i8* %line, i64 %tmp9, !dbg !75
store i8 61, i8* %arrayidx80, align 1, !dbg !76, !tbaa !42
br label %for.end, !dbg !77
if.then84: ; No predecessors!
%arrayidx86 = getelementptr inbounds i8, i8* %input, i64 %indvars.iv, !dbg !78
%tmp10 = load i8, i8* %arrayidx86, align 1, !dbg !78, !tbaa !42
%tmp11 = lshr i8 %tmp10, 2, !dbg !82
call void @llvm.dbg.value(metadata i8 %tmp10, metadata !32, metadata !DIExpression(DW_OP_constu, 2, DW_OP_shra, DW_OP_stack_value)), !dbg !83
%addconv.i206 = add nuw nsw i8 %tmp11, 32, !dbg !85
call void @llvm.dbg.value(metadata i8 %addconv.i206, metadata !22, metadata !DIExpression()), !dbg !58
%inc92 = add nuw nsw i32 %loffs.0223, 1, !dbg !86
call void @llvm.dbg.value(metadata i32 %inc92, metadata !21, metadata !DIExpression()), !dbg !30
%tmp12 = zext i32 %loffs.0223 to i64, !dbg !87
%arrayidx94 = getelementptr inbounds i8, i8* %line, i64 %tmp12, !dbg !87
store i8 %addconv.i206, i8* %arrayidx94, align 1, !dbg !88, !tbaa !42
%tmp13 = load i8, i8* %arrayidx86, align 1, !dbg !89, !tbaa !42
%shl98 = shl i8 %tmp13, 4, !dbg !90
%tmp14 = add nsw i64 %indvars.iv, 1, !dbg !91
%arrayidx101 = getelementptr inbounds i8, i8* %input, i64 %tmp14, !dbg !92
%tmp15 = load i8, i8* %arrayidx101, align 1, !dbg !92, !tbaa !42
%tmp16 = ashr i8 %tmp15, 4, !dbg !93
%or104 = or i8 %tmp16, %shl98, !dbg !94
call void @llvm.dbg.value(metadata i8 %or104, metadata !32, metadata !DIExpression()), !dbg !95
%tmp17 = and i8 %or104, 63, !dbg !97
%addconv.i204 = add nuw nsw i8 %tmp17, 32, !dbg !98
call void @llvm.dbg.value(metadata i8 %addconv.i204, metadata !22, metadata !DIExpression()), !dbg !58
%inc108 = add nuw nsw i32 %loffs.0223, 2, !dbg !99
call void @llvm.dbg.value(metadata i32 %inc108, metadata !21, metadata !DIExpression()), !dbg !30
%tmp18 = zext i32 %inc92 to i64, !dbg !100
%arrayidx110 = getelementptr inbounds i8, i8* %line, i64 %tmp18, !dbg !100
store i8 %addconv.i204, i8* %arrayidx110, align 1, !dbg !101, !tbaa !42
%tmp19 = load i8, i8* %arrayidx101, align 1, !dbg !102, !tbaa !42
%shl115 = shl i8 %tmp19, 2, !dbg !103
call void @llvm.dbg.value(metadata i8 %shl115, metadata !32, metadata !DIExpression()), !dbg !104
%tmp20 = and i8 %shl115, 60, !dbg !106
%addconv.i202 = add nuw nsw i8 %tmp20, 32, !dbg !107
call void @llvm.dbg.value(metadata i8 %addconv.i202, metadata !22, metadata !DIExpression()), !dbg !58
%inc119 = add nuw nsw i32 %loffs.0223, 3, !dbg !108
call void @llvm.dbg.value(metadata i32 %inc119, metadata !21, metadata !DIExpression()), !dbg !30
%tmp21 = zext i32 %inc108 to i64, !dbg !109
%arrayidx121 = getelementptr inbounds i8, i8* %line, i64 %tmp21, !dbg !109
store i8 %addconv.i202, i8* %arrayidx121, align 1, !dbg !110, !tbaa !42
%inc122 = add nuw nsw i32 %loffs.0223, 4, !dbg !111
call void @llvm.dbg.value(metadata i32 %inc122, metadata !21, metadata !DIExpression()), !dbg !30
%tmp22 = zext i32 %inc119 to i64, !dbg !112
%arrayidx124 = getelementptr inbounds i8, i8* %line, i64 %tmp22, !dbg !112
store i8 61, i8* %arrayidx124, align 1, !dbg !113, !tbaa !42
br label %for.end, !dbg !114
if.end126: ; preds = %for.body
%arrayidx6 = getelementptr inbounds i8, i8* %input, i64 %indvars.iv, !dbg !115
%tmp23 = load i8, i8* %arrayidx6, align 1, !dbg !115, !tbaa !42
%tmp24 = lshr i8 %tmp23, 2, !dbg !117
call void @llvm.dbg.value(metadata i8 %tmp23, metadata !32, metadata !DIExpression(DW_OP_constu, 2, DW_OP_shra, DW_OP_stack_value)), !dbg !118
%addconv.i218 = add nuw nsw i8 %tmp24, 32, !dbg !120
call void @llvm.dbg.value(metadata i8 %addconv.i218, metadata !22, metadata !DIExpression()), !dbg !58
%inc11 = add nuw nsw i32 %loffs.0223, 1, !dbg !121
call void @llvm.dbg.value(metadata i32 %inc11, metadata !21, metadata !DIExpression()), !dbg !30
%tmp25 = zext i32 %loffs.0223 to i64, !dbg !122
%arrayidx13 = getelementptr inbounds i8, i8* %line, i64 %tmp25, !dbg !122
store i8 %addconv.i218, i8* %arrayidx13, align 1, !dbg !123, !tbaa !42
%tmp26 = load i8, i8* %arrayidx6, align 1, !dbg !124, !tbaa !42
%shl = shl i8 %tmp26, 4, !dbg !125
%tmp27 = add nsw i64 %indvars.iv, 1, !dbg !126
%arrayidx18 = getelementptr inbounds i8, i8* %input, i64 %tmp27, !dbg !127
%tmp28 = load i8, i8* %arrayidx18, align 1, !dbg !127, !tbaa !42
%tmp29 = ashr i8 %tmp28, 4, !dbg !128
%or = or i8 %tmp29, %shl, !dbg !129
call void @llvm.dbg.value(metadata i8 %or, metadata !32, metadata !DIExpression()), !dbg !130
%tmp30 = and i8 %or, 63, !dbg !132
%addconv.i216 = add nuw nsw i8 %tmp30, 32, !dbg !133
call void @llvm.dbg.value(metadata i8 %addconv.i216, metadata !22, metadata !DIExpression()), !dbg !58
%inc24 = add nuw nsw i32 %loffs.0223, 2, !dbg !134
call void @llvm.dbg.value(metadata i32 %inc24, metadata !21, metadata !DIExpression()), !dbg !30
%tmp31 = zext i32 %inc11 to i64, !dbg !135
%arrayidx26 = getelementptr inbounds i8, i8* %line, i64 %tmp31, !dbg !135
store i8 %addconv.i216, i8* %arrayidx26, align 1, !dbg !136, !tbaa !42
%tmp32 = load i8, i8* %arrayidx18, align 1, !dbg !137, !tbaa !42
%shl31 = shl i8 %tmp32, 2, !dbg !138
%tmp33 = add nsw i64 %indvars.iv, 2, !dbg !139
%arrayidx34 = getelementptr inbounds i8, i8* %input, i64 %tmp33, !dbg !140
%tmp34 = load i8, i8* %arrayidx34, align 1, !dbg !140, !tbaa !42
%tmp35 = ashr i8 %tmp34, 6, !dbg !141
%or37 = or i8 %tmp35, %shl31, !dbg !142
call void @llvm.dbg.value(metadata i8 %or37, metadata !32, metadata !DIExpression()), !dbg !143
%tmp36 = and i8 %or37, 63, !dbg !145
%addconv.i214 = add nuw nsw i8 %tmp36, 32, !dbg !146
call void @llvm.dbg.value(metadata i8 %addconv.i214, metadata !22, metadata !DIExpression()), !dbg !58
%inc41 = add nuw nsw i32 %loffs.0223, 3, !dbg !147
call void @llvm.dbg.value(metadata i32 %inc41, metadata !21, metadata !DIExpression()), !dbg !30
%tmp37 = zext i32 %inc24 to i64, !dbg !148
%arrayidx43 = getelementptr inbounds i8, i8* %line, i64 %tmp37, !dbg !148
store i8 %addconv.i214, i8* %arrayidx43, align 1, !dbg !149, !tbaa !42
%tmp38 = load i8, i8* %arrayidx34, align 1, !dbg !150, !tbaa !42
call void @llvm.dbg.value(metadata i8 %tmp38, metadata !32, metadata !DIExpression()), !dbg !151
%tmp39 = and i8 %tmp38, 63, !dbg !153
%addconv.i212 = add nuw nsw i8 %tmp39, 32, !dbg !154
call void @llvm.dbg.value(metadata i8 %addconv.i212, metadata !22, metadata !DIExpression()), !dbg !58
%inc49 = add nuw nsw i32 %loffs.0223, 4, !dbg !155
call void @llvm.dbg.value(metadata i32 %inc49, metadata !21, metadata !DIExpression()), !dbg !30
%tmp40 = zext i32 %inc41 to i64, !dbg !156
%arrayidx51 = getelementptr inbounds i8, i8* %line, i64 %tmp40, !dbg !156
store i8 %addconv.i212, i8* %arrayidx51, align 1, !dbg !157, !tbaa !42
%indvars.iv.next = add nsw i64 %indvars.iv, 3, !dbg !158
%sub = add nsw i32 %octets.addr.0221, -3, !dbg !159
call void @llvm.dbg.value(metadata i32 %inc49, metadata !21, metadata !DIExpression()), !dbg !30
call void @llvm.dbg.value(metadata i32 undef, metadata !18, metadata !DIExpression(DW_OP_plus_uconst, 3, DW_OP_stack_value)), !dbg !27
call void @llvm.dbg.value(metadata i32 %sub, metadata !19, metadata !DIExpression()), !dbg !28
%cmp = icmp eq i32 %octets.addr.0221, 3, !dbg !45
br i1 %cmp, label %for.end, label %for.body, !dbg !46, !llvm.loop !160
for.end: ; preds = %if.end126, %if.then84, %if.then54, %if.else, %entry.split
%loffs.0.lcssa = phi i32 [ 1, %entry.split ], [ %loffs.0223, %if.else ], [ %inc122, %if.then84 ], [ %inc78, %if.then54 ], [ %inc49, %if.end126 ]
call void @llvm.dbg.value(metadata i32 %loffs.0.lcssa, metadata !21, metadata !DIExpression()), !dbg !30
%inc128 = add nsw i32 %loffs.0.lcssa, 1, !dbg !162
call void @llvm.dbg.value(metadata i32 %inc128, metadata !21, metadata !DIExpression()), !dbg !30
%idxprom129 = sext i32 %loffs.0.lcssa to i64, !dbg !163
%arrayidx130 = getelementptr inbounds i8, i8* %line, i64 %idxprom129, !dbg !163
store i8 10, i8* %arrayidx130, align 1, !dbg !164, !tbaa !42
%idxprom131 = sext i32 %inc128 to i64, !dbg !165
%arrayidx132 = getelementptr inbounds i8, i8* %line, i64 %idxprom131, !dbg !165
store i8 0, i8* %arrayidx132, align 1, !dbg !166, !tbaa !42
ret void, !dbg !167
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
attributes #0 = { nounwind readnone speculatable }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!5, !6, !7}
!llvm.ident = !{!8}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 330016) (llvm/trunk 330038)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
!1 = !DIFile(filename: "C:\5CUsers\5CMeinersbur\5Csrc\5Cllvm\5Ctools\5Cpolly\5Ctest\5Cuuencode.c", directory: "/tmp/runtest-kzqu096e")
!2 = !{}
!3 = !{!4}
!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
!5 = !{i32 2, !"Dwarf Version", i32 4}
!6 = !{i32 2, !"Debug Info Version", i32 3}
!7 = !{i32 1, !"wchar_size", i32 4}
!8 = !{!"clang version 7.0.0 (trunk 330016) (llvm/trunk 330038)"}
!9 = distinct !DISubprogram(name: "encode_line", scope: !10, file: !10, line: 79, type: !11, isLocal: false, isDefinition: true, scopeLine: 79, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !16)
!10 = !DIFile(filename: "uuencode.c", directory: "/tmp/runtest-kzqu096e")
!11 = !DISubroutineType(types: !12)
!12 = !{null, !13, !15, !15, !13}
!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64)
!14 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!16 = !{!17, !18, !19, !20, !21, !22}
!17 = !DILocalVariable(name: "input", arg: 1, scope: !9, file: !10, line: 79, type: !13)
!18 = !DILocalVariable(name: "offset", arg: 2, scope: !9, file: !10, line: 79, type: !15)
!19 = !DILocalVariable(name: "octets", arg: 3, scope: !9, file: !10, line: 79, type: !15)
!20 = !DILocalVariable(name: "line", arg: 4, scope: !9, file: !10, line: 79, type: !13)
!21 = !DILocalVariable(name: "loffs", scope: !9, file: !10, line: 80, type: !15)
!22 = !DILocalVariable(name: "ch", scope: !23, file: !10, line: 86, type: !14)
!23 = distinct !DILexicalBlock(scope: !24, file: !10, line: 83, column: 55)
!24 = distinct !DILexicalBlock(scope: !25, file: !10, line: 83, column: 3)
!25 = distinct !DILexicalBlock(scope: !9, file: !10, line: 83, column: 3)
!26 = !DILocation(line: 79, column: 24, scope: !9)
!27 = !DILocation(line: 79, column: 35, scope: !9)
!28 = !DILocation(line: 79, column: 47, scope: !9)
!29 = !DILocation(line: 79, column: 61, scope: !9)
!30 = !DILocation(line: 80, column: 7, scope: !9)
!31 = !DILocation(line: 81, column: 27, scope: !9)
!32 = !DILocalVariable(name: "c", arg: 1, scope: !33, file: !10, line: 75, type: !14)
!33 = distinct !DISubprogram(name: "encode_char", scope: !10, file: !10, line: 75, type: !34, isLocal: false, isDefinition: true, scopeLine: 75, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !36)
!34 = !DISubroutineType(types: !35)
!35 = !{!15, !14}
!36 = !{!32}
!37 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !38)
!38 = distinct !DILocation(line: 81, column: 15, scope: !9)
!39 = !DILocation(line: 76, column: 17, scope: !33, inlinedAt: !38)
!40 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !38)
!41 = !DILocation(line: 81, column: 14, scope: !9)
!42 = !{!43, !43, i64 0}
!43 = !{!"omnipotent char", !44, i64 0}
!44 = !{!"Simple C/C++ TBAA"}
!45 = !DILocation(line: 83, column: 24, scope: !24)
!46 = !DILocation(line: 83, column: 3, scope: !25)
!47 = !DILocation(line: 87, column: 16, scope: !48)
!48 = distinct !DILexicalBlock(scope: !23, file: !10, line: 87, column: 9)
!49 = !DILocation(line: 87, column: 9, scope: !23)
!50 = !DILocation(line: 99, column: 23, scope: !51)
!51 = distinct !DILexicalBlock(scope: !52, file: !10, line: 98, column: 24)
!52 = distinct !DILexicalBlock(scope: !53, file: !10, line: 98, column: 11)
!53 = distinct !DILexicalBlock(scope: !48, file: !10, line: 97, column: 12)
!54 = !DILocation(line: 99, column: 37, scope: !51)
!55 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !56)
!56 = distinct !DILocation(line: 99, column: 10, scope: !51)
!57 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !56)
!58 = !DILocation(line: 86, column: 10, scope: !23)
!59 = !DILocation(line: 100, column: 15, scope: !51)
!60 = !DILocation(line: 100, column: 5, scope: !51)
!61 = !DILocation(line: 100, column: 19, scope: !51)
!62 = !DILocation(line: 101, column: 23, scope: !51)
!63 = !DILocation(line: 101, column: 37, scope: !51)
!64 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !65)
!65 = distinct !DILocation(line: 101, column: 10, scope: !51)
!66 = !DILocation(line: 76, column: 17, scope: !33, inlinedAt: !65)
!67 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !65)
!68 = !DILocation(line: 102, column: 15, scope: !51)
!69 = !DILocation(line: 102, column: 5, scope: !51)
!70 = !DILocation(line: 102, column: 19, scope: !51)
!71 = !DILocation(line: 103, column: 15, scope: !51)
!72 = !DILocation(line: 103, column: 5, scope: !51)
!73 = !DILocation(line: 103, column: 19, scope: !51)
!74 = !DILocation(line: 104, column: 15, scope: !51)
!75 = !DILocation(line: 104, column: 5, scope: !51)
!76 = !DILocation(line: 104, column: 19, scope: !51)
!77 = !DILocation(line: 106, column: 4, scope: !51)
!78 = !DILocation(line: 108, column: 25, scope: !79)
!79 = distinct !DILexicalBlock(scope: !80, file: !10, line: 107, column: 22)
!80 = distinct !DILexicalBlock(scope: !81, file: !10, line: 107, column: 9)
!81 = distinct !DILexicalBlock(scope: !52, file: !10, line: 106, column: 11)
!82 = !DILocation(line: 108, column: 40, scope: !79)
!83 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !84)
!84 = distinct !DILocation(line: 108, column: 11, scope: !79)
!85 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !84)
!86 = !DILocation(line: 109, column: 16, scope: !79)
!87 = !DILocation(line: 109, column: 6, scope: !79)
!88 = !DILocation(line: 109, column: 20, scope: !79)
!89 = !DILocation(line: 110, column: 25, scope: !79)
!90 = !DILocation(line: 110, column: 39, scope: !79)
!91 = !DILocation(line: 110, column: 60, scope: !79)
!92 = !DILocation(line: 110, column: 48, scope: !79)
!93 = !DILocation(line: 110, column: 64, scope: !79)
!94 = !DILocation(line: 110, column: 45, scope: !79)
!95 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !96)
!96 = distinct !DILocation(line: 110, column: 11, scope: !79)
!97 = !DILocation(line: 76, column: 17, scope: !33, inlinedAt: !96)
!98 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !96)
!99 = !DILocation(line: 111, column: 16, scope: !79)
!100 = !DILocation(line: 111, column: 6, scope: !79)
!101 = !DILocation(line: 111, column: 20, scope: !79)
!102 = !DILocation(line: 112, column: 24, scope: !79)
!103 = !DILocation(line: 112, column: 40, scope: !79)
!104 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !105)
!105 = distinct !DILocation(line: 112, column: 11, scope: !79)
!106 = !DILocation(line: 76, column: 17, scope: !33, inlinedAt: !105)
!107 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !105)
!108 = !DILocation(line: 113, column: 16, scope: !79)
!109 = !DILocation(line: 113, column: 6, scope: !79)
!110 = !DILocation(line: 113, column: 20, scope: !79)
!111 = !DILocation(line: 114, column: 16, scope: !79)
!112 = !DILocation(line: 114, column: 6, scope: !79)
!113 = !DILocation(line: 114, column: 20, scope: !79)
!114 = !DILocation(line: 116, column: 5, scope: !79)
!115 = !DILocation(line: 88, column: 25, scope: !116)
!116 = distinct !DILexicalBlock(scope: !48, file: !10, line: 87, column: 22)
!117 = !DILocation(line: 88, column: 39, scope: !116)
!118 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !119)
!119 = distinct !DILocation(line: 88, column: 12, scope: !116)
!120 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !119)
!121 = !DILocation(line: 89, column: 17, scope: !116)
!122 = !DILocation(line: 89, column: 7, scope: !116)
!123 = !DILocation(line: 89, column: 21, scope: !116)
!124 = !DILocation(line: 90, column: 26, scope: !116)
!125 = !DILocation(line: 90, column: 40, scope: !116)
!126 = !DILocation(line: 90, column: 61, scope: !116)
!127 = !DILocation(line: 90, column: 49, scope: !116)
!128 = !DILocation(line: 90, column: 65, scope: !116)
!129 = !DILocation(line: 90, column: 46, scope: !116)
!130 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !131)
!131 = distinct !DILocation(line: 90, column: 12, scope: !116)
!132 = !DILocation(line: 76, column: 17, scope: !33, inlinedAt: !131)
!133 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !131)
!134 = !DILocation(line: 91, column: 17, scope: !116)
!135 = !DILocation(line: 91, column: 7, scope: !116)
!136 = !DILocation(line: 91, column: 21, scope: !116)
!137 = !DILocation(line: 92, column: 26, scope: !116)
!138 = !DILocation(line: 92, column: 42, scope: !116)
!139 = !DILocation(line: 92, column: 63, scope: !116)
!140 = !DILocation(line: 92, column: 51, scope: !116)
!141 = !DILocation(line: 92, column: 67, scope: !116)
!142 = !DILocation(line: 92, column: 48, scope: !116)
!143 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !144)
!144 = distinct !DILocation(line: 92, column: 12, scope: !116)
!145 = !DILocation(line: 76, column: 17, scope: !33, inlinedAt: !144)
!146 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !144)
!147 = !DILocation(line: 93, column: 17, scope: !116)
!148 = !DILocation(line: 93, column: 7, scope: !116)
!149 = !DILocation(line: 93, column: 21, scope: !116)
!150 = !DILocation(line: 94, column: 25, scope: !116)
!151 = !DILocation(line: 75, column: 18, scope: !33, inlinedAt: !152)
!152 = distinct !DILocation(line: 94, column: 12, scope: !116)
!153 = !DILocation(line: 76, column: 17, scope: !33, inlinedAt: !152)
!154 = !DILocation(line: 76, column: 13, scope: !33, inlinedAt: !152)
!155 = !DILocation(line: 95, column: 17, scope: !116)
!156 = !DILocation(line: 95, column: 7, scope: !116)
!157 = !DILocation(line: 95, column: 21, scope: !116)
!158 = !DILocation(line: 83, column: 36, scope: !24)
!159 = !DILocation(line: 83, column: 49, scope: !24)
!160 = distinct !{!160, !46, !161}
!161 = !DILocation(line: 119, column: 3, scope: !25)
!162 = !DILocation(line: 121, column: 13, scope: !9)
!163 = !DILocation(line: 121, column: 3, scope: !9)
!164 = !DILocation(line: 121, column: 17, scope: !9)
!165 = !DILocation(line: 122, column: 3, scope: !9)
!166 = !DILocation(line: 122, column: 15, scope: !9)
!167 = !DILocation(line: 124, column: 1, scope: !9)

6
polly/test/ScopInfo/NonAffine/non_affine_region_guaranteed_non-entry.ll
View File

@ -1,6 +1,12 @@
; RUN: opt %loadPolly -polly-detect -polly-scops -analyze \
; RUN: -polly-allow-nonaffine-loops < %s | FileCheck %s
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
; The BasicBlock "guaranteed" is always executed inside the non-affine subregion
; region_entry->region_exit. As such, writes accesses in blocks that always
; execute are MustWriteAccesses. Before Polly commit r255473, we only assumed

8
polly/test/ScopInfo/complex-loop-nesting.ll
View File

@ -1,5 +1,11 @@
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
;
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
;
; CHECK: Statements {
; CHECK-NEXT: Stmt_for_body_outer
; CHECK-NEXT: Domain :=

6
polly/test/ScopInfo/isl_trip_count_multiple_exiting_blocks.ll
View File

@ -1,5 +1,11 @@
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
;
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
;
; CHECK: Domain :=
; CHECK: { Stmt_if_end[i0] : 0 <= i0 <= 1024 };
;

6
polly/test/ScopInfo/loop-multiexit-succ-cond.ll
View File

@ -1,6 +1,12 @@
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
; RUN: opt %loadPolly -polly-codegen -S < %s | FileCheck %s --check-prefix=IR
;
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
;
; Check that we do not crash and generate valid IR.
;
; CHECK: Assumed Context:

6
polly/test/ScopInfo/multiple_exiting_blocks.ll
View File

@ -1,5 +1,11 @@
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
;
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
;
; CHECK: Domain :=
; CHECK: [N, P, Q] -> { Stmt_if_end[i0] : 0 <= i0 <= 1 + Q and i0 < N and (i0 < P or (P < 0 and i0 >= 2 + P)); Stmt_if_end[0] : N > 0 and ((P <= -2 and Q <= -2) or (P > 0 and Q <= -2) or P = -1) };
;

6
polly/test/ScopInfo/multiple_exiting_blocks_two_loop.ll
View File

@ -1,5 +1,11 @@
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
;
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
;
; void foo(long n, float A[100]) {
; for (long j = 0; j < n; j++) {
; for (long i = j; i < n; i++) {

6
polly/test/ScopInfo/schedule-const-post-dominator-walk-2.ll
View File

@ -1,5 +1,11 @@
; RUN: opt %loadPolly -analyze -polly-scops < %s | FileCheck %s
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
; CHECK: Stmt_loopA[i0] -> [0, 0, 0]
; CHECK-DAG: Stmt_loopB[i0] -> [0, 0, 1]
; CHECK-DAG: Stmt_bbB[] -> [1, 0, 0]

6
polly/test/ScopInfo/schedule-const-post-dominator-walk.ll
View File

@ -1,5 +1,11 @@
; RUN: opt %loadPolly -analyze -polly-scops < %s | FileCheck %s
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
; CHECK: { Stmt_bb3[i0] -> [0, 0] };
; CHECK: { Stmt_bb2[] -> [1, 0] };

6
polly/test/ScopInfo/switch-5.ll
View File

@ -1,6 +1,12 @@
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
; RUN: opt %loadPolly -polly-ast -analyze < %s | FileCheck %s --check-prefix=AST
;
; The SCoP contains a loop with multiple exit blocks (BBs after leaving
; the loop). The current implementation of deriving their domain derives
; only a common domain for all of the exit blocks. We disabled loops with
; multiple exit blocks until this is fixed.
; XFAIL: *
;
; void f(int *A, int *B, int N) {
; for (int i = 0; i < N; i++) {
; A[i]++;