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re PR rtl-optimization/61220 (ICE on valid code at -O2 on x86_64-linux-gnu in maybe_record_trace_start, at dwarf2cfi.c:2239)

Browse Source 
ChangeLog:
2014-05-26  Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	PR rtl-optimization/61220
	Part of PR rtl-optimization/61225
	* shrink-wrap.c (move_insn_for_shrink_wrap): Skip SP and FP adjustment
	insn; skip split_edge for a block with only one successor.

testsuite/ChangeLog:
2014-05-26  Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	* gcc.dg/pr61220.c: New test.
	* gcc.dg/shrink-wrap-loop.c: Disable for x86_64 -m32 mode.

From-SVN: r210921
This commit is contained in:
Zhenqiang Chen 2014-05-26 06:11:33 +00:00 committed by Zhenqiang Chen
parent 97ae6b6443
commit 88f32f0f92
5 changed files with 63 additions and 2 deletions

8
gcc/ChangeLog

@ -1,3 +1,11 @@
ChangeLog:
2014-05-26 Zhenqiang Chen <zhenqiang.chen@linaro.org>
PR rtl-optimization/61220
Part of PR rtl-optimization/61225
* shrink-wrap.c (move_insn_for_shrink_wrap): Skip SP and FP adjustment
insn; skip split_edge for a block with only one successor.
2014-05-23 Jan Hubicka <hubicka@ucw.cz>
* symtab.c (symtab_nonoverwritable_alias): Copy READONLY flag for variables.

11
gcc/shrink-wrap.c

@ -179,7 +179,12 @@ move_insn_for_shrink_wrap (basic_block bb, rtx insn,
return false;
src = SET_SRC (set);
dest = SET_DEST (set);
if (!REG_P (dest) || !REG_P (src))
if (!REG_P (dest) || !REG_P (src)
/* STACK or FRAME related adjustment might be part of prologue.
So keep them in the entry block. */
|| dest == stack_pointer_rtx
|| dest == frame_pointer_rtx
|| dest == hard_frame_pointer_rtx)
return false;
/* Make sure that the source register isn't defined later in BB. */
@ -204,6 +209,10 @@ move_insn_for_shrink_wrap (basic_block bb, rtx insn,
/* Create a new basic block on the edge. */
if (EDGE_COUNT (next_block->preds) == 2)
{
/* split_edge for a block with only one successor is meaningless. */
if (EDGE_COUNT (bb->succs) == 1)
return false;
next_block = split_edge (live_edge);
bitmap_copy (df_get_live_in (next_block), df_get_live_out (bb));

5
gcc/testsuite/ChangeLog

@ -1,3 +1,8 @@
2014-05-26 Zhenqiang Chen <zhenqiang.chen@linaro.org>
* gcc.dg/pr61220.c: New test.
* gcc.dg/shrink-wrap-loop.c: Disable for x86_64 -m32 mode.
2014-05-25 Tobias Burnus <burnus@net-b.de>
* gfortran.dg/coarray_10.f90: Update dg-warning.

39
gcc/testsuite/gcc.dg/pr61220.c Normal file

@ -0,0 +1,39 @@
/* { dg-do compile } */
/* { dg-options "-O2 -g" } */
int a, c, d, e, f, g, h, i, j, k;
struct S0
{
int f0;
int f1;
int f2;
};
struct S1
{
int f0;
int f1;
struct S0 f2;
} b;
void
fn1 (struct S1 p)
{
for (; k; k++)
h = j ? a : a - 1;
d &= i;
}
int
main ()
{
int l[5] = { 0 };
fn1 (b);
for (c = 0; c < 3; c++)
for (g = 0; g < 3; g++)
l[c * 2] = e = l[c];
if (f)
fn1 (b);
return 0;
}

2
gcc/testsuite/gcc.dg/shrink-wrap-loop.c

@ -1,4 +1,4 @@
/* { dg-do compile { target { { x86_64-*-* } || { arm_thumb2 } } } } */
/* { dg-do compile { target { { x86_64-*-* && lp64 } || { arm_thumb2 } } } } */
/* { dg-options "-O2 -fdump-rtl-pro_and_epilogue" } */
int foo (int *p1, int *p2);