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[FIX] Allow to lookup domains for non-affine subregion blocks 

llvm-svn: 265779
This commit is contained in:
Johannes Doerfert 2016-04-08 10:32:26 +00:00
parent 3ef78d6d38
commit 41cda15940
3 changed files with 85 additions and 23 deletions
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4
polly/include/polly/ScopInfo.h
View File

@ -2053,12 +2053,12 @@ public:
/// for complex cases without "error handling code" needed on the users side.
__isl_give isl_pw_aff *getPwAff(const SCEV *E, BasicBlock *BB = nullptr);
/// @brief Return the non-loop carried conditions on the domain of @p Stmt.
/// @brief Return the domain of @p Stmt.
///
/// @param Stmt The statement for which the conditions should be returned.
__isl_give isl_set *getDomainConditions(ScopStmt *Stmt);
/// @brief Return the non-loop carried conditions on the domain of @p BB.
/// @brief Return the domain of @p BB.
///
/// @param BB The block for which the conditions should be returned.
__isl_give isl_set *getDomainConditions(BasicBlock *BB);

31
polly/lib/Analysis/ScopInfo.cpp
View File

@ -2114,8 +2114,15 @@ isl_set *Scop::getDomainConditions(ScopStmt *Stmt) {
}
isl_set *Scop::getDomainConditions(BasicBlock *BB) {
assert(DomainMap.count(BB) && "Requested BB did not have a domain");
return isl_set_copy(DomainMap[BB]);
auto DIt = DomainMap.find(BB);
if (DIt != DomainMap.end())
return isl_set_copy(DIt->getSecond());
auto &RI = *R.getRegionInfo();
auto *BBR = RI.getRegionFor(BB);
while (BBR->getEntry() == BB)
BBR = BBR->getParent();
return getDomainConditions(BBR->getEntry());
}
bool Scop::buildDomains(Region *R, ScopDetection &SD, DominatorTree &DT,
@ -2442,24 +2449,6 @@ bool Scop::buildDomainsWithBranchConstraints(Region *R, ScopDetection &SD,
return true;
}
/// @brief Return the domain for @p BB wrt @p DomainMap.
///
/// This helper function will lookup @p BB in @p DomainMap but also handle the
/// case where @p BB is contained in a non-affine subregion using the region
/// tree obtained by @p RI.
static __isl_give isl_set *
getDomainForBlock(BasicBlock *BB, DenseMap<BasicBlock *, isl_set *> &DomainMap,
RegionInfo &RI) {
auto DIt = DomainMap.find(BB);
if (DIt != DomainMap.end())
return isl_set_copy(DIt->getSecond());
Region *R = RI.getRegionFor(BB);
while (R->getEntry() == BB)
R = R->getParent();
return getDomainForBlock(R->getEntry(), DomainMap, RI);
}
isl_set *Scop::getPredecessorDomainConstraints(BasicBlock *BB, isl_set *Domain,
ScopDetection &SD,
DominatorTree &DT,
@ -2509,7 +2498,7 @@ isl_set *Scop::getPredecessorDomainConstraints(BasicBlock *BB, isl_set *Domain,
PropagatedRegions.insert(PredR);
}
auto *PredBBDom = getDomainForBlock(PredBB, DomainMap, RI);
auto *PredBBDom = getDomainConditions(PredBB);
auto *PredBBLoop = getFirstNonBoxedLoopFor(PredBB, LI, BoxedLoops);
PredBBDom = adjustDomainDimensions(*this, PredBBDom, PredBBLoop, BBLoop);

73
polly/test/Isl/CodeGen/invariant_load_in_non_affine_subregion.ll Normal file
View File

@ -0,0 +1,73 @@
; RUN: opt %loadPolly -polly-codegen -S < %s | FileCheck %s
;
; This crashed at some point as the invariant load is in a non-affine
; subregion. Just check it does not anymore.
;
; CHECK: polly.start
;
; ModuleID = 'bugpoint-reduced-simplified.bc'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
%struct.d = type { i32, i32, i32, i32, float, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
@board = external global [421 x i8], align 16
@output_flags = external global i32, align 4
@dragon = external global [400 x %struct.d], align 16
; Function Attrs: nounwind uwtable
define void @sgffile_add_debuginfo() #0 {
entry:
br label %entry.split
entry.split: ; preds = %entry
%0 = getelementptr inbounds [24 x i8], [24 x i8]* undef, i64 0, i64 0
br i1 false, label %cleanup, label %for.cond1.preheader
for.cond1.preheader: ; preds = %entry.split
br i1 false, label %if.then7, label %land.lhs.true49
if.then7: ; preds = %for.cond1.preheader
%arrayidx = getelementptr inbounds [421 x i8], [421 x i8]* @board, i64 0, i64 0
%crude_status = getelementptr inbounds [400 x %struct.d], [400 x %struct.d]* @dragon, i64 0, i64 0, i32 5
switch i32 0, label %if.end15 [
i32 0, label %sw.bb
i32 2, label %sw.bb13
]
sw.bb: ; preds = %if.then7
br label %if.end15
sw.bb13: ; preds = %if.then7
br label %if.end15
if.end15: ; preds = %sw.bb13, %sw.bb, %if.then7
%cmp21 = fcmp ogt float undef, 0.000000e+00
br i1 %cmp21, label %land.lhs.true23, label %for.cond1.for.inc44_crit_edge
land.lhs.true23: ; preds = %if.end15
%1 = load i32, i32* @output_flags, align 4
%and24 = and i32 %1, 2
%tobool25 = icmp eq i32 %and24, 0
br i1 %tobool25, label %for.cond1.for.inc44_crit_edge, label %if.else
if.else: ; preds = %land.lhs.true23
br label %for.cond1.for.inc44_crit_edge
for.cond1.for.inc44_crit_edge: ; preds = %if.else, %land.lhs.true23, %if.end15
br label %land.lhs.true49
land.lhs.true49: ; preds = %for.cond1.for.inc44_crit_edge, %for.cond1.preheader
%2 = load i32, i32* @output_flags, align 4
%and50 = and i32 %2, 2
%tobool51 = icmp eq i32 %and50, 0
br i1 %tobool51, label %cleanup, label %if.then52
if.then52: ; preds = %land.lhs.true49
br label %cleanup
cleanup: ; preds = %if.then52, %land.lhs.true49, %entry.split
call void @llvm.lifetime.end(i64 24, i8* %0)
ret void
}
declare void @llvm.lifetime.end(i64, i8* nocapture)