Define ATTRIBUTE_ALIGNED_VALUE to 32 for IA MCU

attribute ((aligned)) should align to the minimum of BIGGEST_ALIGNMENT,
which is 4 bytes for -miamcu.

gcc/

	PR target/66818
	* config/i386/i386.h (ATTRIBUTE_ALIGNED_VALUE): Defined to 32
	for IA MCU.

gcc/testsuite/

	PR target/66818
	* gcc.target/i386/pr66818.c: New test.

From-SVN: r225606

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 78cc6f9..e7f7dac 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,11 @@
 2015-07-09  H.J. Lu  <hongjiu.lu@intel.com>
 
+       PR target/66818
+       * config/i386/i386.h (ATTRIBUTE_ALIGNED_VALUE): Defined to 32
+       for IA MCU.
+
+2015-07-09  H.J. Lu  <hongjiu.lu@intel.com>
+
        PR target/66817
        * config/i386/i386.c (ix86_return_in_memory): Return true
        if int_size_in_bytes returns negative for IA MCU.

diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index f357e79..74334ff 100644 (file)
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -811,7 +811,7 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
 
 /* Alignment value for attribute ((aligned)).  It is a constant since
    it is the part of the ABI.  We shouldn't change it with -mavx.  */
-#define ATTRIBUTE_ALIGNED_VALUE 128
+#define ATTRIBUTE_ALIGNED_VALUE (TARGET_IAMCU ? 32 : 128)
 
 /* Decide whether a variable of mode MODE should be 128 bit aligned.  */
 #define ALIGN_MODE_128(MODE) \

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 42b6203..49d6f2b 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,10 @@
 2015-07-09  H.J. Lu  <hongjiu.lu@intel.com>
 
+       PR target/66818
+       * gcc.target/i386/pr66818.c: New test.
+
+2015-07-09  H.J. Lu  <hongjiu.lu@intel.com>
+
        PR target/66817
        * gcc.target/i386/pr66817.c: New test.
 

diff --git a/gcc/testsuite/gcc.target/i386/pr66818.c b/gcc/testsuite/gcc.target/i386/pr66818.c
new file mode 100644 (file)
index 0000000..d90394c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr66818.c
@@ -0,0 +1,5 @@
+/* { dg-do compile { target ia32 } } */
+/* { dg-options "-O2 -mno-sse -mno-mmx -miamcu" } */
+
+struct dummy { int x __attribute__((aligned)); };
+int array[__alignof__(struct dummy) == 4 ? 1 : -1];