diff --git a/ChangeLog b/ChangeLog
index 54d9145..e0e2ea9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -34,6 +34,9 @@
      i386 with SSE2. Found by László Langó. Fixes #1550
    * Fix namespacing in header files. Remove the `mbedtls` namespacing in
      the `#include` in the header files. Resolves #857
+   * Fix compiler warning of 'use before initialisation' in
+     mbedtls_pk_parse_key(). Found by Martin Boye Petersen and fixed by Dawid
+     Drozd. #1098
    * Fix decryption of zero length messages (all padding) in some circumstances:
      DTLS 1.0 and 1.2, and CBC ciphersuites using encrypt-then-MAC. Most often
      seen when communicating with OpenSSL using TLS 1.0. Reported by @kFYatek
diff --git a/include/mbedtls/bn_mul.h b/include/mbedtls/bn_mul.h
index 438aa8c..b587317 100644
--- a/include/mbedtls/bn_mul.h
+++ b/include/mbedtls/bn_mul.h
@@ -56,7 +56,7 @@
  * This is done as the number of registers used in the assembly code doesn't
  * work with the -O0 option.
  */
-#if defined(__i386__) && !defined(__OPTIMIZE__)
+#if defined(__i386__) && defined(__OPTIMIZE__)
 
 #define MULADDC_INIT                        \
     asm(                                    \
diff --git a/library/pkparse.c b/library/pkparse.c
index ccb7f54..d6ac987 100644
--- a/library/pkparse.c
+++ b/library/pkparse.c
@@ -1261,7 +1261,6 @@
         return( ret );
 #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
 #else
-    ((void) ret);
     ((void) pwd);
     ((void) pwdlen);
 #endif /* MBEDTLS_PEM_PARSE_C */
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 3a413ad..7654a64 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -97,6 +97,10 @@
 #include <windows.h>
 #endif
 
+/* Size of memory to be allocated for the heap, when using the library's memory
+ * management and MBEDTLS_MEMORY_BUFFER_ALLOC_C is enabled. */
+#define MEMORY_HEAP_SIZE        120000
+
 #define DFL_SERVER_ADDR         NULL
 #define DFL_SERVER_PORT         "4433"
 #define DFL_DEBUG_LEVEL         0
@@ -1212,7 +1216,7 @@
     const char *alpn_list[ALPN_LIST_SIZE];
 #endif
 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
-    unsigned char alloc_buf[100000];
+    unsigned char alloc_buf[MEMORY_HEAP_SIZE];
 #endif
 
     int i;
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 1e6fd8c..52e196f 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -348,6 +348,7 @@
             echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
             echo "${start_red}FAILED: $failure_count${end_color}$failure_summary"
             echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+            exit 1
         elif [ -z "${1-}" ]; then
             echo "SUCCESS :)"
         fi
@@ -750,15 +751,30 @@
 fi
 
 if uname -a | grep -F x86_64 >/dev/null; then
-    msg "build: i386, make, gcc" # ~ 30s
+    # Build once with -O0, to compile out the i386 specific inline assembly
+    msg "build: i386, make, gcc -O0 (ASan build)" # ~ 30s
     cleanup
-    make CC=gcc CFLAGS='-Werror -Wall -Wextra -m32'
+    cp "$CONFIG_H" "$CONFIG_BAK"
+    scripts/config.pl full
+    make CC=gcc CFLAGS='-O0 -Werror -Wall -Wextra -m32 -fsanitize=address'
 
-    msg "test: i386, make, gcc"
+    msg "test: i386, make, gcc -O0 (ASan build)"
+    make test
+
+    # Build again with -O1, to compile in the i386 specific inline assembly
+    msg "build: i386, make, gcc -O1 (ASan build)" # ~ 30s
+    cleanup
+    cp "$CONFIG_H" "$CONFIG_BAK"
+    scripts/config.pl full
+    make CC=gcc CFLAGS='-O1 -Werror -Wall -Wextra -m32 -fsanitize=address'
+
+    msg "test: i386, make, gcc -O1 (ASan build)"
     make test
 
     msg "build: 64-bit ILP32, make, gcc" # ~ 30s
     cleanup
+    cp "$CONFIG_H" "$CONFIG_BAK"
+    scripts/config.pl full
     make CC=gcc CFLAGS='-Werror -Wall -Wextra -mx32'
 
     msg "test: 64-bit ILP32, make, gcc"