Mesa (master): vc4: Fix use of undefined values since the ralloc zeroing changes.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: bedb99608735aaa260eba0144ca6d46dbe43be55
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=bedb99608735aaa260eba0144ca6d46dbe43be55

Author: Eric Anholt <eric at anholt.net>
Date:   Wed Nov  2 13:51:10 2016 -0700

vc4: Fix use of undefined values since the ralloc zeroing changes.

reralloc() no longer zeroes the new contents, so switch to using
rzalloc_array() instead.

---

 src/gallium/drivers/vc4/vc4_qir_live_variables.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/gallium/drivers/vc4/vc4_qir_live_variables.c b/src/gallium/drivers/vc4/vc4_qir_live_variables.c
index beefb0d..dc058f5 100644
--- a/src/gallium/drivers/vc4/vc4_qir_live_variables.c
+++ b/src/gallium/drivers/vc4/vc4_qir_live_variables.c
@@ -301,8 +301,13 @@ qir_calculate_live_intervals(struct vc4_compile *c)
 {
         int bitset_words = BITSET_WORDS(c->num_temps);
 
-        c->temp_start = reralloc(c, c->temp_start, int, c->num_temps);
-        c->temp_end = reralloc(c, c->temp_end, int, c->num_temps);
+        /* If we called this function more than once, then we should be
+         * freeing the previous arrays.
+         */
+        assert(!c->temp_start);
+
+        c->temp_start = rzalloc_array(c, int, c->num_temps);
+        c->temp_end = rzalloc_array(c, int, c->num_temps);
 
         for (int i = 0; i < c->num_temps; i++) {
                 c->temp_start[i] = MAX_INSTRUCTION;
@@ -310,10 +315,10 @@ qir_calculate_live_intervals(struct vc4_compile *c)
         }
 
         qir_for_each_block(block, c) {
-                block->def = reralloc(c, block->def, BITSET_WORD, bitset_words);
-                block->use = reralloc(c, block->use, BITSET_WORD, bitset_words);
-                block->live_in = reralloc(c, block->live_in, BITSET_WORD, bitset_words);
-                block->live_out = reralloc(c, block->live_out, BITSET_WORD, bitset_words);
+                block->def = rzalloc_array(c, BITSET_WORD, bitset_words);
+                block->use = rzalloc_array(c, BITSET_WORD, bitset_words);
+                block->live_in = rzalloc_array(c, BITSET_WORD, bitset_words);
+                block->live_out = rzalloc_array(c, BITSET_WORD, bitset_words);
         }
 
         qir_setup_def_use(c);