builtin-bswap-6.c: Adjust return value to disable GCC optimization.

2014-04-04  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>

	* gcc.dg/builtin-bswap-6.c: Adjust return value to disable GCC
	optimization.
	* gcc.dg/builtin-bswap-7.c: Likewise.

From-SVN: r209132

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 0cd68ca..7d030fd 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2014-04-04  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
+
+       * gcc.dg/builtin-bswap-6.c: Adjust return value to disable GCC
+       optimization.
+       * gcc.dg/builtin-bswap-7.c: Likewise.
+
 2014-04-04  Paolo Carlini  <paolo.carlini@oracle.com>
 
        PR c++/58207

diff --git a/gcc/testsuite/gcc.dg/builtin-bswap-6.c b/gcc/testsuite/gcc.dg/builtin-bswap-6.c
index 024ebf1..6f0c782 100644 (file)
--- a/gcc/testsuite/gcc.dg/builtin-bswap-6.c
+++ b/gcc/testsuite/gcc.dg/builtin-bswap-6.c
@@ -3,6 +3,10 @@
 /* { dg-options "-O -fdump-rtl-combine" } */
 /* { dg-options "-O -fdump-rtl-combine -march=z900" { target s390-*-* } } */
 
+/* The test intentionally returns 1/2 instead of the obvious 0/1 to
+   prevent GCC from calculating the return value with arithmetic
+   instead of a comparison.  */
+
 #include <stdint.h>
 
 #define BS(X) __builtin_bswap32(X)
@@ -11,28 +15,28 @@ int foo1 (uint32_t a)
 {
   if (BS (a) == 0xA0000)
     return 1;
-  return 0;
+  return 2;
 }
 
 int foo2 (uint32_t a)
 {
   if (BS (a) != 0xA0000)
     return 1;
-  return 0;
+  return 2;
 }
 
 int foo3 (uint32_t a, uint32_t b)
 {
   if (BS (a) == BS (b))
     return 1;
-  return 0;
+  return 2;
 }
 
 int foo4 (uint32_t a, uint32_t b)
 {
   if (BS (a) != BS (b))
     return 1;
-  return 0;
+  return 2;
 }
 
 /* { dg-final { scan-rtl-dump-not "bswapsi" "combine" } } */

diff --git a/gcc/testsuite/gcc.dg/builtin-bswap-7.c b/gcc/testsuite/gcc.dg/builtin-bswap-7.c
index 399b825..0eecdd8 100644 (file)
--- a/gcc/testsuite/gcc.dg/builtin-bswap-7.c
+++ b/gcc/testsuite/gcc.dg/builtin-bswap-7.c
@@ -3,6 +3,10 @@
 /* { dg-require-effective-target lp64 } */
 /* { dg-options "-O -fdump-rtl-combine" } */
 
+/* The test intentionally returns 1/2 instead of the obvious 0/1 to
+   prevent GCC from calculating the return value with arithmetic
+   instead of a comparison.  */
+
 #include <stdint.h>
 
 #define BS(X) __builtin_bswap64(X)
@@ -11,28 +15,28 @@ int foo1 (uint64_t a)
 {
   if (BS (a) == 0xA00000000)
     return 1;
-  return 0;
+  return 2;
 }
 
 int foo2 (uint64_t a)
 {
   if (BS (a) != 0xA00000000)
     return 1;
-  return 0;
+  return 2;
 }
 
 int foo3 (uint64_t a, uint64_t b)
 {
   if (BS (a) == BS (b))
     return 1;
-  return 0;
+  return 2;
 }
 
 int foo4 (uint64_t a, uint64_t b)
 {
   if (BS (a) != BS (b))
     return 1;
-  return 0;
+  return 2;
 }
 
 /* { dg-final { scan-rtl-dump-not "bswapdi" "combine" } } */