[LLVMdev] BasicBlock succ iterator

[neda 8664]

thank john,
i have used dump() , and each blocks had pred except entery block, i get the
following output:

fun     main    entry
entry:
  %retval = alloca i32
  %0 = alloca i32
  %i = alloca i32
  %j = alloca i32
  %a = alloca [2 x i32]
  %n = alloca i32
  %t = alloca i32
  %"alloca point" = bitcast i32 0 to i32
  %1 = getelementptr inbounds [2 x i32]* %a, i32 0, i32 0
  %2 = load i32* getelementptr inbounds ([2 x i32]* @C.0.2045, i32 0, i32
0), align 4
  store i32 %2, i32* %1, align 4
  %3 = getelementptr inbounds [2 x i32]* %a, i32 0, i32 1
  %4 = load i32* getelementptr inbounds ([2 x i32]* @C.0.2045, i32 0, i32
1), align 4
  store i32 %4, i32* %3, align 4
  store i32 2, i32* %n, align 4
  store i32 0, i32* %j, align 4
  br label %loop-replace

 fun     main    loop-replace
loop-replace:                                     ; preds = %entry
  %5 = alloca [3 x i64]
  %j_arg = ptrtoint i32* %j to i64
  %6 = getelementptr [3 x i64]* %5, i64 0, i64 0
  store i64 %j_arg, i64* %6
  %t_arg = ptrtoint i32* %t to i64
  %7 = getelementptr [3 x i64]* %5, i64 0, i64 1
  store i64 %t_arg, i64* %7
  %a_arg = ptrtoint [2 x i32]* %a to i64
  %8 = getelementptr [3 x i64]* %5, i64 0, i64 2
  store i64 %a_arg, i64* %8
  call void @sync_init()
  %9 = bitcast [3 x i64]* %5 to i64*
  call void @sync_delegate(i32 0, i8* (i8*)* @"1_subloop_0", i64* %9)
  %10 = bitcast [3 x i64]* %5 to i64*
  call void @sync_delegate(i32 1, i8* (i8*)* @"1_subloop_1", i64* %10)
  call void @sync_join()
  br label %bb5

 fun     main    bb5
bb5:                                              ; preds = %loop-replace
  %11 = load i32* @sum, align 4
  store i32 %11, i32* %0, align 4
  %12 = load i32* %0, align 4
  store i32 %12, i32* %retval, align 4
  br label %return

 fun     main    return
return:                                           ; preds = %bb5
  %retval6 = load i32* %retval
  ret i32 %retval6

 fun     1_subloop_0    new-entry

new-entry:
  call void @showPlace()
  %1 = bitcast i8* %0 to i64*
  %2 = getelementptr i64* %1, i64 0
  %j_val = load i64* %2, align 8
  call void @showValue(i64 %j_val)
  %3 = trunc i64 %j_val to i32
  %4 = inttoptr i64 %j_val to i32*
  %5 = getelementptr i64* %1, i64 1
  %t_val = load i64* %5, align 8
  call void @showValue(i64 %t_val)
  %6 = trunc i64 %t_val to i32
  %7 = inttoptr i64 %t_val to i32*
  %8 = getelementptr i64* %1, i64 2
  %a_val = load i64* %8, align 8
  call void @showValue(i64 %a_val)
  %9 = trunc i64 %a_val to i32
  %10 = inttoptr i64 %a_val to [2 x i32]*
  br label %bb4_0

 fun     1_subloop_0    bb1_0

bb1_0:                                            ; No predecessors!
  %c0 = call i64 @sync_consume(i32 0)
  %c0_val = trunc i64 %c0 to i32
  %t18_0 = load i32* @p, align 4
  br label %bb3_0

 fun     1_subloop_0    bb2_0
bb2_0:                                            ; No predecessors!
  br label %bb3_0



 fun     1_subloop_0    bb3_0

bb3_0:                                            ; preds = %bb4_0, %bb2_0,
%bb1_0
  %t3_0 = load i32* %7, align 4
  %t4_0 = getelementptr inbounds [2 x i32]* %10, i32 0, i32 %t3_0
  %t5_0 = load i32* %t4_0, align 4
  %t6_0 = load i32* @sum, align 4
  %t7_0 = add nsw i32 %t5_0, %t6_0
  store i32 %t7_0, i32* @sum, align 4
  %t9_0 = load i32* @sum, align 4
  %t10_0 = call i32 (i8*, ...)* @printf(i8* noalias getelementptr inbounds
([4 x i8]* @.str, i32 0, i32 0), i32 %t9_0) nounwind
  %t11_0 = load i32* %4, align 4
  %t12_0 = add nsw i32 %t11_0, 1
  store i32 %t12_0, i32* %4, align 4
  br label %bb4_0

 fun     1_subloop_0    bb4_0

bb4_0:                                            ; preds = %bb3_0,
%new-entry
  %t0_0 = load i32* %4, align 4
  %t1_0 = icmp sle i32 %t0_0, 9
  br i1 %t1_0, label %bb3_0, label %new-exit

 fun     1_subloop_0    new-exit

new-exit:                                         ; preds = %bb4_0
  ret i8* null


 fun     1_subloop_1    new-entry

new-entry:
  call void @showPlace()
  %1 = bitcast i8* %0 to i64*
  %2 = getelementptr i64* %1, i64 0
  %j_val = load i64* %2, align 8
  call void @showValue(i64 %j_val)
  %3 = trunc i64 %j_val to i32
  %4 = inttoptr i64 %j_val to i32*
  %5 = getelementptr i64* %1, i64 1
  %t_val = load i64* %5, align 8
  call void @showValue(i64 %t_val)
  %6 = trunc i64 %t_val to i32
  %7 = inttoptr i64 %t_val to i32*
  %8 = getelementptr i64* %1, i64 2
  %a_val = load i64* %8, align 8
  call void @showValue(i64 %a_val)
  %9 = trunc i64 %a_val to i32
  %10 = inttoptr i64 %a_val to [2 x i32]*
  br label %bb4_1

 fun     1_subloop_1    bb_1
bb_1:                                             ; preds = %bb4_1
  br i1 undef, label %bb1_1, label %bb2_1

 fun     1_subloop_1    bb1_1

bb1_1:                                            ; preds = %bb_1
  %t15_1 = load i32* %7, align 4
  %t16_1 = getelementptr inbounds [2 x i32]* %10, i32 0, i32 %t15_1
  %t17_1 = load i32* %t16_1, align 4
  %t19_1 = mul nsw i32 %t17_1, undef
  %t19_1_64 = sext i32 %t19_1 to i64
  call void @sync_produce(i64 %t19_1_64, i32 0)
  store i32 %t19_1, i32* @p, align 4
  br label %bb3_1

 fun     1_subloop_1    bb2_1

bb2_1:                                            ; preds = %bb_1
  store i32 1, i32* @p, align 4
  br label %bb3_1

 fun     1_subloop_1    bb3_1

bb3_1:                                            ; preds = %bb2_1, %bb1_1
  br label %bb4_1


 fun     1_subloop_1    bb4_1

bb4_1:                                            ; preds = %bb3_1,
%new-entry
  br i1 undef, label %bb_1, label %new-exit


 fun     1_subloop_1    new-exit

new-exit:                                         ; preds = %bb4_1
  ret i8* null
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