1 /* { dg-do compile } */
2 /* { dg-options "-funsafe-loop-optimizations -ftree-vrp" } */
3 
4 typedef int FLAC__int32;
5 typedef int FLAC__bool;
6 typedef struct { } FLAC__Subframe;
7 typedef enum { FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT = 0,  FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE = 1,  FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE = 2,  FLAC__CHANNEL_ASSIGNMENT_MID_SIDE = 3 } FLAC__ChannelAssignment;
8 typedef struct {
9   struct FLAC__StreamEncoderProtected *protected_;
10   struct FLAC__StreamEncoderPrivate *private_;
11 } FLAC__StreamEncoder;
12 typedef struct FLAC__StreamEncoderProtected {
13   FLAC__bool loose_mid_side_stereo;
14   unsigned channels;
15   unsigned blocksize;
16 } FLAC__StreamEncoderProtected;
17 typedef struct FLAC__StreamEncoderPrivate {
18   FLAC__int32 *integer_signal[(8u)];
19   FLAC__Subframe subframe_workspace_mid_side[2][2];
20   unsigned best_subframe_mid_side[2];
21   unsigned loose_mid_side_stereo_frame_count;
22 } FLAC__StreamEncoderPrivate;
get_wasted_bits_(FLAC__int32 signal[],unsigned samples)23 static void get_wasted_bits_(FLAC__int32 signal[], unsigned samples)
24 {
25   unsigned i;
26   FLAC__int32 x = 0;
27   for(i = 0; i < samples && !(x&1); i++)
28     x |= signal[i];
29 }
process_subframes_(FLAC__StreamEncoder * encoder,unsigned * bits)30 FLAC__Subframe * process_subframes_(FLAC__StreamEncoder *encoder, unsigned *bits)
31 {
32   unsigned channel;
33   FLAC__Subframe *left_subframe = 0;
34   FLAC__ChannelAssignment channel_assignment;
35   for(channel = 0; channel < encoder->protected_->channels; channel++)
36       get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize);
37   if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0)
38       channel_assignment = FLAC__CHANNEL_ASSIGNMENT_MID_SIDE;
39   else {
40       FLAC__ChannelAssignment ca = (FLAC__ChannelAssignment)1;
41       unsigned min_bits = bits[0];
42       for(channel_assignment = (FLAC__ChannelAssignment)0; (int)ca <= 3; ca = (FLAC__ChannelAssignment)((int)ca + 1))
43 	  if(bits[ca] < min_bits)
44 	      channel_assignment = ca;
45   }
46   switch(channel_assignment) {
47       case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
48       case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
49       case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
50       case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
51 	  left_subframe = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]];
52   }
53   return left_subframe;
54 }
55