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ScheduleOptimizer: Do not tile bands with just one dimension

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llvm-svn: 146149
This commit is contained in:
Tobias Grosser 2011-12-08 13:02:58 +00:00
parent dd3e9ccd04
commit b6033396fd
2 changed files with 19 additions and 20 deletions
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23
polly/lib/ScheduleOptimizer.cpp
View File

@ -200,27 +200,34 @@ static isl_basic_map *getTileMap(isl_ctx *ctx, int scheduleDimensions,
// getScheduleForBand - Get the schedule for this band.
//
// In case tiling is enabled, the schedule of the band is tiled.
isl_union_map *getScheduleForBand(isl_band *Band) {
// Polly applies transformations like tiling on top of the isl calculated value.
// This can influence the number of scheduling dimension. The number of
// schedule dimensions is returned in the parameter 'Dimension'.
isl_union_map *getScheduleForBand(isl_band *Band, int *Dimensions) {
isl_union_map *PartialSchedule;
int Dimensions;
isl_ctx *ctx;
isl_space *Space;
isl_basic_map *TileMap;
isl_union_map *TileUMap;
PartialSchedule = isl_band_get_partial_schedule(Band);
*Dimensions = isl_band_n_member(Band);
if (DisableTiling)
return PartialSchedule;
// It does not make any sense to tile a band with just one dimension.
if (*Dimensions == 1)
return PartialSchedule;
ctx = isl_union_map_get_ctx(PartialSchedule);
Space = isl_union_map_get_space(PartialSchedule);
Dimensions = isl_band_n_member(Band);
TileMap = getTileMap(ctx, Dimensions, Space);
TileMap = getTileMap(ctx, *Dimensions, Space);
TileUMap = isl_union_map_from_map(isl_map_from_basic_map(TileMap));
TileUMap = isl_union_map_align_params(TileUMap, Space);
*Dimensions = 2 * *Dimensions;
return isl_union_map_apply_range(PartialSchedule, TileUMap);
}
@ -348,8 +355,7 @@ static isl_union_map *getScheduleForBandList(isl_band_list *BandList) {
isl_space *Space;
Band = isl_band_list_get_band(BandList, i);
PartialSchedule = getScheduleForBand(Band);
ScheduleDimensions = isl_band_n_member(Band);
PartialSchedule = getScheduleForBand(Band, &ScheduleDimensions);
Space = isl_union_map_get_space(PartialSchedule);
if (isl_band_has_children(Band)) {
@ -367,8 +373,7 @@ static isl_union_map *getScheduleForBandList(isl_band_list *BandList) {
isl_map *TileMap;
isl_union_map *TileUMap;
TileMap = getPrevectorMap(ctx, ScheduleDimensions + i,
ScheduleDimensions * 2);
TileMap = getPrevectorMap(ctx, i, ScheduleDimensions);
TileUMap = isl_union_map_from_map(TileMap);
TileUMap = isl_union_map_align_params(TileUMap,
isl_space_copy(Space));

16
polly/test/ScheduleOptimizer/2011-08-25-crash_in_vectorizer.ll
View File

@ -30,21 +30,15 @@ bb2: ; preds = %bb2, %.lr.ph
}
; CHECK: if (p_0 >= 1) {
; CHECK: for (c1=0;c1<=p_0-1;c1+=32) {
; CHECK: for (c2=c1;c2<=min(c1+31,p_0-1);c2++) {
; CHECK: Stmt_bb2(c2);
; CHECK: }
; CHECK: for (c1=0;c1<=p_0-1;c1++) {
; CHECK: Stmt_bb2(c1);
; CHECK: }
; CHECK: }
; VECTOR: if (p_0 >= 1) {
; VECTOR: for (c1=0;c1<=p_0-1;c1+=32) {
; VECTOR: for (c2=-4*floord(-c1,4);c2<=min(c1+31,p_0-1);c2+=4) {
; VECTOR: for (c3=c2;c3<=min(c2+3,p_0-1);c3++) {
; VECTOR: Stmt_bb2(c3);
; VECTOR: }
; VECTOR: for (c1=0;c1<=p_0-1;c1+=4) {
; VECTOR: for (c2=c1;c2<=min(c1+3,p_0-1);c2++) {
; VECTOR: Stmt_bb2(c2);
; VECTOR: }
; VECTOR: }
; VECTOR: }