re PR target/9732 ([ppc32] Wrong code with -O2 -fPIC)

	2003-02-25  Franz Sirl  <Franz.Sirl-kernel@lauterbach.com>

	PR target/9732
	* gcc.dg/20030225-1.c: New test.

From-SVN: r63424

2 files changed, 108 insertions, 0 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9ea81bb..e13423d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2003-02-25  Franz Sirl  <Franz.Sirl-kernel@lauterbach.com>
+
+	PR target/9732
+	* gcc.dg/20030225-1.c: New test.
+
 2003-02-24  Mark Mitchell  <mark@codesourcery.com>
 
 	* README: Remove out-of-date information.
diff --git a/gcc/testsuite/gcc.dg/20030225-1.c b/gcc/testsuite/gcc.dg/20030225-1.c
new file mode 100644
index 0000000..7c30898
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/20030225-1.c
@@ -0,0 +1,103 @@
+/* PR target/9732
+   This testcase segfaulted on PPC because PIC_OFFSET_TABLE_REGNUM was no
+   fixed register.
+   Distilled from the xvid sources by Guillaume Morin <guillaume@morinfr.org>
+   and Benjamin Herrenschmidt <benh@kernel.crashing.org>.  */
+/* { dg-do run } */
+/* { dg-options "-O2 -fPIC" } */
+/* { dg-warning "not supported" "PIC unsupported" { target cris-*-elf* mmix-*-* } 0 } */
+
+
+extern void exit (int);
+
+#define W1 2841					/* 2048*sqrt(2)*cos(1*pi/16) */
+#define W2 2676					/* 2048*sqrt(2)*cos(2*pi/16) */
+#define W3 2408					/* 2048*sqrt(2)*cos(3*pi/16) */
+#define W5 1609					/* 2048*sqrt(2)*cos(5*pi/16) */
+#define W6 1108					/* 2048*sqrt(2)*cos(6*pi/16) */
+#define W7 565					/* 2048*sqrt(2)*cos(7*pi/16) */
+
+
+/* private data */
+static short iclip[1024];		/* clipping table */
+static short *iclp;
+
+void
+idct_int32(short *const block)
+{
+  static short *blk;
+  static long i;
+  static long X0, X1, X2, X3, X4, X5, X6, X7, X8;
+
+  for (i = 0; i < 8; i++)		/* idct columns */
+    {
+      blk = block + i;
+      /* shortcut  */
+      if (! ((X1 = (blk[8 * 4] << 8)) | (X2 = blk[8 * 6])
+	     | (X3 = blk[8 * 2]) | (X4 = blk[8 * 1]) | (X5 = blk[8 * 7])
+	     | (X6 = blk[8 * 5]) | (X7 = blk[8 * 3])))
+	{
+	  blk[8 * 0] = blk[8 * 1] = blk[8 * 2] = 
+	    blk[8 * 3] = blk[8 * 4] =
+	    blk[8 * 5] = blk[8 * 6] = blk[8 * 7] =
+	    iclp[(blk[8 * 0] + 32) >> 6];
+	  continue;
+	}
+      X0 = (blk[8 * 0] << 8) + 8192;
+
+      /* first stage  */
+      X8 = W7 * (X4 + X5) + 4;
+      X4 = (X8 + (W1 - W7) * X4) >> 3;
+      X5 = (X8 - (W1 + W7) * X5) >> 3;
+      X8 = W3 * (X6 + X7) + 4;
+      X6 = (X8 - (W3 - W5) * X6) >> 3;
+      X7 = (X8 - (W3 + W5) * X7) >> 3;
+
+      /* second stage  */
+      X8 = X0 + X1;
+      X0 -= X1;
+      X1 = W6 * (X3 + X2) + 4;
+      X2 = (X1 - (W2 + W6) * X2) >> 3;
+      X3 = (X1 + (W2 - W6) * X3) >> 3;
+      X1 = X4 + X6;
+      X4 -= X6;
+      X6 = X5 + X7;
+      X5 -= X7;
+
+      /* third stage  */
+      X7 = X8 + X3;
+      X8 -= X3;
+      X3 = X0 + X2;
+      X0 -= X2;
+      X2 = (181 * (X4 + X5) + 128) >> 8;
+      X4 = (181 * (X4 - X5) + 128) >> 8;
+
+      /* fourth stage  */
+      blk[8 * 0] = iclp[(X7 + X1) >> 14];
+      blk[8 * 1] = iclp[(X3 + X2) >> 14];
+      blk[8 * 2] = iclp[(X0 + X4) >> 14];
+      blk[8 * 3] = iclp[(X8 + X6) >> 14];
+      blk[8 * 4] = iclp[(X8 - X6) >> 14];
+      blk[8 * 5] = iclp[(X0 - X4) >> 14];
+      blk[8 * 6] = iclp[(X3 - X2) >> 14];
+      blk[8 * 7] = iclp[(X7 - X1) >> 14];
+    }
+}								/* end function idct_int32(block) */
+
+
+int main(void) {
+  int i;
+  unsigned short tab[64];
+
+  for (i = 0 ; i < 64 ; ++i) 
+    {  
+      tab[i] = (1+(int) (65535)*8000/(2147483647+1.0));
+    }
+  
+  iclp = iclip + 512;
+  for (i = -512; i < 512; i++)
+    iclp[i] = (i < -256) ? -256 : ((i > 255) ? 255 : i);
+
+  idct_int32((short *) tab);
+  exit (0);
+}