forked from OSchip/llvm-project
GPGPU: Do not fail in case of arrays never accessed
If these arrays have never been accessed we failed to derive an upper bound of the accesses and consequently a size for the outermost dimension. We now explicitly check for empty access sets and then just use zero as size for the outermost dimension. llvm-svn: 281165
This commit is contained in:
Tobias Grosser
parent
e73ef85c6f
commit
02293ed755
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@ -1784,17 +1784,27 @@ public:
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/// @param Array The polly array from which to take the information.
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void setArrayBounds(gpu_array_info &PPCGArray, ScopArrayInfo *Array) {
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if (PPCGArray.n_index > 0) {
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isl_set *Dom = isl_set_copy(PPCGArray.extent);
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Dom = isl_set_project_out(Dom, isl_dim_set, 1, PPCGArray.n_index - 1);
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isl_pw_aff *Bound = isl_set_dim_max(isl_set_copy(Dom), 0);
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isl_set_free(Dom);
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Dom = isl_pw_aff_domain(isl_pw_aff_copy(Bound));
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isl_local_space *LS = isl_local_space_from_space(isl_set_get_space(Dom));
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isl_aff *One = isl_aff_zero_on_domain(LS);
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One = isl_aff_add_constant_si(One, 1);
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Bound = isl_pw_aff_add(Bound, isl_pw_aff_alloc(Dom, One));
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Bound = isl_pw_aff_gist(Bound, S->getContext());
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PPCGArray.bound[0] = Bound;
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if (isl_set_is_empty(PPCGArray.extent)) {
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isl_set *Dom = isl_set_copy(PPCGArray.extent);
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isl_local_space *LS = isl_local_space_from_space(
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isl_space_params(isl_set_get_space(Dom)));
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isl_set_free(Dom);
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isl_aff *Zero = isl_aff_zero_on_domain(LS);
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PPCGArray.bound[0] = isl_pw_aff_from_aff(Zero);
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} else {
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isl_set *Dom = isl_set_copy(PPCGArray.extent);
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Dom = isl_set_project_out(Dom, isl_dim_set, 1, PPCGArray.n_index - 1);
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isl_pw_aff *Bound = isl_set_dim_max(isl_set_copy(Dom), 0);
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isl_set_free(Dom);
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Dom = isl_pw_aff_domain(isl_pw_aff_copy(Bound));
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isl_local_space *LS =
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isl_local_space_from_space(isl_set_get_space(Dom));
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isl_aff *One = isl_aff_zero_on_domain(LS);
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One = isl_aff_add_constant_si(One, 1);
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Bound = isl_pw_aff_add(Bound, isl_pw_aff_alloc(Dom, One));
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Bound = isl_pw_aff_gist(Bound, S->getContext());
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PPCGArray.bound[0] = Bound;
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}
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}
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for (unsigned i = 1; i < PPCGArray.n_index; ++i) {
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@ -0,0 +1,272 @@
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; RUN: opt %loadPolly -polly-codegen-ppcg -polly-acc-dump-code \
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; RUN: -disable-output < %s | \
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; RUN: FileCheck -check-prefix=CODE %s
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; CODE: Code
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; CODE-NEXT: ====
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; CODE-NEXT: # host
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; CODE-NEXT: {
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; CODE-NEXT: cudaCheckReturn(cudaMemcpy(dev_MemRef_global_1, MemRef_global_1, (142) * sizeof(i32), cudaMemcpyHostToDevice));
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; CODE-NEXT: {
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; CODE-NEXT: dim3 k0_dimBlock(10);
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; CODE-NEXT: dim3 k0_dimGrid(1);
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; CODE-NEXT: kernel0 <<<k0_dimGrid, k0_dimBlock>>> (dev_MemRef_global_1);
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; CODE-NEXT: cudaCheckKernel();
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; CODE-NEXT: }
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; CODE: cudaCheckReturn(cudaMemcpy(MemRef_global_1, dev_MemRef_global_1, (142) * sizeof(i32), cudaMemcpyDeviceToHost));
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; CODE-NEXT: }
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; CODE: # kernel0
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; CODE-NEXT: Stmt_bb33(t0, 0);
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.hoge = type { [23 x i16], [22 x i16], [14 x i16], [13 x i16] }
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@global = external global [9 x %struct.hoge], align 16
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@global.1 = external global [9 x [152 x i32]], align 16
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; Function Attrs: nounwind uwtable
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define void @widget() #0 {
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bb:
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br label %bb1
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bb1: ; preds = %bb1, %bb
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br i1 undef, label %bb1, label %bb2
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bb2: ; preds = %bb2, %bb1
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br i1 undef, label %bb2, label %bb3
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bb3: ; preds = %bb3, %bb2
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br i1 undef, label %bb3, label %bb4
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bb4: ; preds = %bb4, %bb3
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br i1 undef, label %bb4, label %bb5
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bb5: ; preds = %bb5, %bb4
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br i1 undef, label %bb5, label %bb6
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bb6: ; preds = %bb6, %bb5
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br i1 undef, label %bb6, label %bb7
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bb7: ; preds = %bb7, %bb6
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br i1 undef, label %bb7, label %bb8
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bb8: ; preds = %bb8, %bb7
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br i1 undef, label %bb8, label %bb9
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bb9: ; preds = %bb8
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br label %bb10
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bb10: ; preds = %bb12, %bb9
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br label %bb11
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bb11: ; preds = %bb11, %bb10
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br i1 undef, label %bb11, label %bb12
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bb12: ; preds = %bb11
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br i1 undef, label %bb10, label %bb13
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bb13: ; preds = %bb18, %bb12
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br i1 undef, label %bb16, label %bb14
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bb14: ; preds = %bb16, %bb13
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br i1 undef, label %bb15, label %bb18
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bb15: ; preds = %bb14
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br label %bb17
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bb16: ; preds = %bb16, %bb13
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br i1 undef, label %bb16, label %bb14
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bb17: ; preds = %bb17, %bb15
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br i1 undef, label %bb17, label %bb18
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bb18: ; preds = %bb17, %bb14
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br i1 undef, label %bb13, label %bb19
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bb19: ; preds = %bb25, %bb18
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br label %bb20
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bb20: ; preds = %bb24, %bb19
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br i1 undef, label %bb21, label %bb24
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bb21: ; preds = %bb20
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br i1 undef, label %bb23, label %bb22
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bb22: ; preds = %bb21
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br label %bb24
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bb23: ; preds = %bb21
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br label %bb24
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bb24: ; preds = %bb23, %bb22, %bb20
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br i1 undef, label %bb20, label %bb25
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bb25: ; preds = %bb24
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br i1 undef, label %bb19, label %bb26
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bb26: ; preds = %bb56, %bb25
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%tmp = phi [9 x [152 x i32]]* [ undef, %bb56 ], [ bitcast (i32* getelementptr inbounds ([9 x [152 x i32]], [9 x [152 x i32]]* @global.1, i64 0, i64 0, i64 32) to [9 x [152 x i32]]*), %bb25 ]
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br label %bb27
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bb27: ; preds = %bb27, %bb26
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br i1 undef, label %bb27, label %bb28
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bb28: ; preds = %bb27
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%tmp29 = bitcast [9 x [152 x i32]]* %tmp to i32*
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br label %bb30
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bb30: ; preds = %bb38, %bb28
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%tmp31 = phi i32 [ 3, %bb28 ], [ %tmp40, %bb38 ]
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%tmp32 = phi i32* [ %tmp29, %bb28 ], [ %tmp39, %bb38 ]
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br label %bb33
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bb33: ; preds = %bb33, %bb30
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%tmp34 = phi i32 [ 0, %bb30 ], [ %tmp37, %bb33 ]
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%tmp35 = phi i32* [ %tmp32, %bb30 ], [ undef, %bb33 ]
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%tmp36 = getelementptr inbounds i32, i32* %tmp35, i64 1
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store i32 undef, i32* %tmp36, align 4, !tbaa !1
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%tmp37 = add nuw nsw i32 %tmp34, 1
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br i1 false, label %bb33, label %bb38
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bb38: ; preds = %bb33
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%tmp39 = getelementptr i32, i32* %tmp32, i64 12
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%tmp40 = add nuw nsw i32 %tmp31, 1
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%tmp41 = icmp ne i32 %tmp40, 13
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br i1 %tmp41, label %bb30, label %bb42
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bb42: ; preds = %bb38
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%tmp43 = getelementptr inbounds [9 x %struct.hoge], [9 x %struct.hoge]* @global, i64 0, i64 0, i32 3, i64 0
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br label %bb44
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bb44: ; preds = %bb51, %bb42
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%tmp45 = phi i32 [ 0, %bb42 ], [ %tmp52, %bb51 ]
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%tmp46 = phi i16* [ %tmp43, %bb42 ], [ undef, %bb51 ]
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%tmp47 = load i16, i16* %tmp46, align 2, !tbaa !5
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br label %bb48
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bb48: ; preds = %bb48, %bb44
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%tmp49 = phi i32 [ 0, %bb44 ], [ %tmp50, %bb48 ]
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%tmp50 = add nuw nsw i32 %tmp49, 1
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br i1 false, label %bb48, label %bb51
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bb51: ; preds = %bb48
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%tmp52 = add nuw nsw i32 %tmp45, 1
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%tmp53 = icmp ne i32 %tmp52, 13
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br i1 %tmp53, label %bb44, label %bb54
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bb54: ; preds = %bb51
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br label %bb55
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bb55: ; preds = %bb55, %bb54
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br i1 undef, label %bb55, label %bb56
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bb56: ; preds = %bb55
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br i1 undef, label %bb26, label %bb57
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bb57: ; preds = %bb60, %bb56
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br label %bb58
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bb58: ; preds = %bb58, %bb57
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br i1 undef, label %bb58, label %bb59
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bb59: ; preds = %bb59, %bb58
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br i1 undef, label %bb59, label %bb60
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bb60: ; preds = %bb59
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br i1 undef, label %bb57, label %bb61
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bb61: ; preds = %bb65, %bb60
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br label %bb62
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bb62: ; preds = %bb64, %bb61
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br label %bb63
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bb63: ; preds = %bb63, %bb62
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br i1 undef, label %bb63, label %bb64
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bb64: ; preds = %bb63
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br i1 undef, label %bb62, label %bb65
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bb65: ; preds = %bb64
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br i1 undef, label %bb61, label %bb66
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bb66: ; preds = %bb70, %bb65
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br label %bb67
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bb67: ; preds = %bb69, %bb66
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br label %bb68
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bb68: ; preds = %bb68, %bb67
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br i1 undef, label %bb68, label %bb69
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bb69: ; preds = %bb68
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br i1 undef, label %bb67, label %bb70
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bb70: ; preds = %bb69
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br i1 undef, label %bb66, label %bb71
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bb71: ; preds = %bb73, %bb70
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br label %bb72
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bb72: ; preds = %bb72, %bb71
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br i1 undef, label %bb72, label %bb73
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bb73: ; preds = %bb72
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br i1 undef, label %bb71, label %bb74
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bb74: ; preds = %bb80, %bb73
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br label %bb75
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bb75: ; preds = %bb79, %bb74
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br label %bb76
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bb76: ; preds = %bb78, %bb75
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br label %bb77
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bb77: ; preds = %bb77, %bb76
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br i1 undef, label %bb77, label %bb78
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bb78: ; preds = %bb77
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br i1 undef, label %bb76, label %bb79
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bb79: ; preds = %bb78
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br i1 undef, label %bb75, label %bb80
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bb80: ; preds = %bb79
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br i1 undef, label %bb74, label %bb81
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bb81: ; preds = %bb85, %bb80
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br label %bb82
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bb82: ; preds = %bb84, %bb81
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br label %bb83
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bb83: ; preds = %bb83, %bb82
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br i1 undef, label %bb83, label %bb84
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bb84: ; preds = %bb83
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br i1 undef, label %bb82, label %bb85
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bb85: ; preds = %bb84
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br i1 undef, label %bb81, label %bb86
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bb86: ; preds = %bb85
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ret void
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}
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attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "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" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!llvm.ident = !{!0}
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!0 = !{!"clang version 4.0.0 (http://llvm.org/git/clang.git 359c45534e46a8ef263db1a8b855740bbeca6998) (http://llvm.org/git/llvm.git 2628aff56683b7652abe9f9eb9e54a82d1716aa7)"}
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!1 = !{!2, !2, i64 0}
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!2 = !{!"int", !3, i64 0}
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!3 = !{!"omnipotent char", !4, i64 0}
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!4 = !{!"Simple C/C++ TBAA"}
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!5 = !{!6, !6, i64 0}
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!6 = !{!"short", !3, i64 0}
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