gcc_4.5.1: add pr44606.patch

Add fix for PR44606 as proposed in
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44606

(From OE-Core rev: 5ec03dc1f80e437d5660aa3e0c7db9b561603d49)

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 106 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.5.1/pr44606.patch b/meta/recipes-devtools/gcc/gcc-4.5.1/pr44606.patch
new file mode 100644
index 0000000000..dd590bbe80
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.5.1/pr44606.patch
@@ -0,0 +1,106 @@
+From aff0ca6587a2f0849db55eef62a85bc8721869f2 Mon Sep 17 00:00:00 2001
+From: froydnj <froydnj@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Tue, 1 Feb 2011 02:11:54 +0000
+Subject: [PATCH 3/6] gcc/ Backport from mainline: 2010-12-30 Nathan Froyd <froydnj@codesourcery.com>
+
+        PR target/44606
+        * reload1.c (choose_reload_regs): Don't look for equivalences for
+        output reloads of constant loads.
+
+gcc/testsuite/
+        Backport from mainline:
+        2010-12-30  Nathan Froyd  <froydnj@codesourcery.com>
+
+        PR target/44606
+        * gcc.dg/pr44606.c: New test.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_4-branch@169465 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+ gcc/reload1.c                  |   11 --------
+ gcc/testsuite/gcc.dg/pr44606.c |   52 ++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 52 insertions(+), 11 deletions(-)
+ create mode 100644 gcc/testsuite/gcc.dg/pr44606.c
+
+diff --git a/gcc/reload1.c b/gcc/reload1.c
+index 02fef2d..5732677 100644
+--- a/gcc/reload1.c
++++ b/gcc/reload1.c
+@@ -6273,17 +6273,6 @@ choose_reload_regs (struct insn_chain *chain)
+              && (rld[r].nregs == max_group_size
+                  || ! reg_classes_intersect_p (rld[r].rclass, group_class)))
+            search_equiv = rld[r].in;
+-         /* If this is an output reload from a simple move insn, look
+-            if an equivalence for the input is available.  */
+-         else if (inheritance && rld[r].in == 0 && rld[r].out != 0)
+-           {
+-             rtx set = single_set (insn);
+-
+-             if (set
+-                 && rtx_equal_p (rld[r].out, SET_DEST (set))
+-                 && CONSTANT_P (SET_SRC (set)))
+-               search_equiv = SET_SRC (set);
+-           }
+ 
+          if (search_equiv)
+            {
+diff --git a/gcc/testsuite/gcc.dg/pr44606.c b/gcc/testsuite/gcc.dg/pr44606.c
+new file mode 100644
+index 0000000..3929775
+--- /dev/null
++++ b/gcc/testsuite/gcc.dg/pr44606.c
+@@ -0,0 +1,52 @@
++/* PR target/44606 */
++/* { dg-do run } */
++/* { dg-options "-O2" } */
++
++#include <stdio.h>
++
++extern void abort (void);
++
++ typedef struct _PixelPacket {         unsigned char r, g, b; }
++ PixelPacket;
++#define ARRAYLEN(X) (sizeof(X)/sizeof(X[0]))
++PixelPacket q[6];
++#define COLS (ARRAYLEN(q) - 1)
++PixelPacket p[2*COLS + 22];
++#define Minify(POS, WEIGHT) do {       \
++       total_r += (WEIGHT)*(p[POS].r); \
++       total_g += (WEIGHT)*(p[POS].g); \
++       total_b += (WEIGHT)*(p[POS].b); \
++} while (0)
++unsigned long columns = COLS;
++int main(void)
++{
++       static const unsigned char answers[COLS] = { 31, 32, 34, 35, 36 };
++       unsigned long x;
++       for (x = 0; x < sizeof(p)/sizeof(p[0]); x++) {
++               p[x].b = (x + 34) | 1;
++       }
++       for (x = 0; x < columns; x++) {
++               double total_r = 0, total_g = 0, total_b = 0;
++               double saved_r = 0, saved_g = 0, saved_b = 0;
++               Minify(2*x +  0,  3.0);
++               Minify(2*x +  1,  7.0);
++               Minify(2*x +  2,  7.0);
++               saved_r = total_r;
++               saved_g = total_g;
++               Minify(2*x + 11, 15.0);
++               Minify(2*x + 12,  7.0);
++               Minify(2*x + 18,  7.0);
++               Minify(2*x + 19, 15.0);
++               Minify(2*x + 20, 15.0);
++               Minify(2*x + 21,  7.0);
++               q[x].r = (unsigned char)(total_r/128.0 + 0.5);
++               q[x].g = (unsigned char)(total_g/128.0 + 0.5);
++               q[x].b = (unsigned char)(total_b/128.0 + 0.5);
++               fprintf(stderr, "r:%f g:%f b:%f\n", saved_r, saved_g, saved_b);
++       }
++       for (x = 0; x < COLS; x++) {
++               if (answers[x] != q[x].b)
++                       abort();
++       }
++       return 0;
++}
+-- 
+1.7.4
+