[patch testsuite]: Adjust tree-ssa/builtin-expect-*.c tests for high cost-branching optimization

Kai Tietz ktietz@redhat.com
Tue Oct 18 12:14:00 GMT 2011


Hello,

this patch adjusts __builtin_expect tests in tree-ssa so, that short-circuit branch optimization don't lead to fallout.  I've used here a multiplication, as simple substraction/addition might get optimized away.

ChangeLog

2011-10-18  Kai Tietz  <ktietz@redhat.com>

        * gcc.dg/tree-ssa/builtin-expect-1.c: Adjust test.
        * gcc.dg/tree-ssa/builtin-expect-2.c: Adjust test.
        * gcc.dg/tree-ssa/builtin-expect-3.c: Adjust test.
        * gcc.dg/tree-ssa/builtin-expect-4.c: Adjust test.
        * gcc.dg/tree-ssa/builtin-expect-5.c: Adjust test.


Regression tested for x86_64-unknown-linux-gnu. Ok for apply?

Regards,
Kai

Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-1.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-1.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-1.c
@@ -1,9 +1,9 @@
 /* { dg-do compile } */
 /* { dg-options "-O2 -fdump-tree-gimple" } */
 
-f (int i, float j) 
+f (int i, float j, int i2, float j2) 
 { 
-  if (__builtin_expect (i > 0 && j, 0)) 
+  if (__builtin_expect ((i * i2) > 0 && (j * j2), 0)) 
     g ();
 } 
 
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-2.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-2.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-2.c
@@ -1,9 +1,9 @@
 /* { dg-do compile } */
 /* { dg-options "-O2 -fdump-tree-gimple" } */
 
-f (int i, float j) 
+f (int i, float j, int i2, float j2) 
 { 
-  if (__builtin_expect (i > 0 || j, 0))
+  if (__builtin_expect ((i * i2) > 0 || (j * j2), 0))
     ;
   else
     g ();
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-3.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-3.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-3.c
@@ -1,9 +1,9 @@
 /* { dg-do compile } */
 /* { dg-options "-O2 -fdump-tree-gimple" } */
 
-f (int i, float j) 
+f (int i, float j, int i2, float j2) 
 { 
-  if (__builtin_expect (i > 0 && j, 0))
+  if (__builtin_expect ((i * i2) > 0 && (j * j2), 0))
     a ();
   else
     b ();
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-4.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-4.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-4.c
@@ -1,9 +1,9 @@
 /* { dg-do compile } */
 /* { dg-options "-O2 -fdump-tree-gimple" } */
 
-f (int i, float j) 
+f (int i, float j, int i2, float j2) 
 { 
-  if (__builtin_expect (i > 0 || j, 0))
+  if (__builtin_expect ((i * i2) > 0 || (j * j2), 0))
     a ();
   else
     b ();
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
@@ -1,9 +1,9 @@
 /* { dg-do compile } */
 /* { dg-options "-O2 -fdump-tree-forwprop" } */
 
-f (int i, float j) 
+f (int i, float j, int i2, float j2) 
 { 
-  if (__builtin_expect (i > 0 && __builtin_expect (j != 0, 1), 0))
+  if (__builtin_expect ((i * i2) > 0 && __builtin_expect ((j * j2) != 0, 1), 0))
     a ();
   else
     b ();



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