re PR tree-optimization/47555 (Huge memory usage when optimizing)

2011-02-01  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/47555
	Revert
	2010-07-15  Sebastian Pop  <sebastian.pop@amd.com>

	* params.def (PARAM_SCEV_MAX_EXPR_SIZE): Bump the value to 100.

	* gcc.dg/pr47555.c: New testcase.

From-SVN: r169478

gcc/ChangeLog

+2011-02-01  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/47555
+	Revert
+	2010-07-15  Sebastian Pop  <sebastian.pop@amd.com>
+
+	* params.def (PARAM_SCEV_MAX_EXPR_SIZE): Bump the value to 100.
+
 2011-02-01  Sebastien Bourdeauducq  <sebastien@milkymist.org>
 
 	PR gcc/46692

gcc/params.def

@@ -481,7 +481,7 @@ DEFPARAM(PARAM_IV_ALWAYS_PRUNE_CAND_SET_BOUND,
 DEFPARAM(PARAM_SCEV_MAX_EXPR_SIZE,
  	 "scev-max-expr-size",
 	 "Bound on size of expressions used in the scalar evolutions analyzer",
-	 100, 0, 0)
+	 20, 0, 0)
 
 DEFPARAM(PARAM_OMEGA_MAX_VARS,
  	 "omega-max-vars",

gcc/testsuite/ChangeLog

 2011-02-01  Richard Guenther  <rguenther@suse.de>
 
+	PR tree-optimization/47555
+	* gcc.dg/pr47555.c: New testcase.
+
+2011-02-01  Richard Guenther  <rguenther@suse.de>
+
 	PR tree-optimization/47541
 	* g++.dg/torture/pr47541.C: New testcase.
 

gcc/testsuite/gcc.dg/pr47555.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+#define FILL_BACK *ptrRGB++=0; *ptrRGB++=0; *ptrRGB++=0;
+
+  
+void uncompact(unsigned char* ptrRGB, const unsigned int* ptrSrc, const unsigned char* ptrRGBcompact, int line, int nbPixLeft)
+{
+
+#define BIT_2_RGB32                                                     \
+  if ((v & 0x00000001)){ nbPixLeft--; *ptrRGB++ = *ptrRGBcompact++; *ptrRGB++ = *ptrRGBcompact++; *ptrRGB++ = *ptrRGBcompact++; } \
+  else{ FILL_BACK }                                                     \
+  v >>= 1;
+#define BIT_2_RGB16                                                     \
+  if ((v16 & 0x0001)){ nbPixLeft--; *ptrRGB++ = *ptrRGBcompact++; *ptrRGB++ = *ptrRGBcompact++; *ptrRGB++ = *ptrRGBcompact++; } \
+  else{ FILL_BACK }                                                     \
+  v16 >>= 1;				
+
+  int x;
+  unsigned int v, *ptrSrc32bits=(unsigned int*)ptrSrc;
+  unsigned short v16,*ptrSrc16bits;
+
+  for(x=0; x<line; x++) {
+    v = *ptrSrc32bits++;
+    BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32
+    BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32
+    BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32
+    BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32 BIT_2_RGB32
+  }
+
+  ptrSrc16bits=(unsigned short *)ptrSrc32bits;
+  v16 = *ptrSrc16bits++;
+  BIT_2_RGB16	BIT_2_RGB16	BIT_2_RGB16	BIT_2_RGB16	BIT_2_RGB16	BIT_2_RGB16	
+  BIT_2_RGB16	BIT_2_RGB16	BIT_2_RGB16	BIT_2_RGB16	BIT_2_RGB16	BIT_2_RGB16      
+ 
+}