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re PR tree-optimization/70726 (Internal compiler error (ICE) on valid code)

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2016-04-20  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/70726
	* tree-vect-stmts.c (vectorizable_shift): Do not use scalar
	shift amounts from a pattern stmt operand.

	* g++.dg/vect/pr70726.cc: New testcase.

From-SVN: r235236
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Richard Biener 2016-04-20 07:20:16 +00:00 • committed by Richard Biener
parent 82c6f58aaf
commit 60d393e89c
4 changed files with 40 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-04-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/70726
* tree-vect-stmts.c (vectorizable_shift): Do not use scalar
shift amounts from a pattern stmt operand.
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-04-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/70726
* g++.dg/vect/pr70726.cc: New testcase.
2016-04-20 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/70674

19
gcc/testsuite/g++.dg/vect/pr70726.cc Normal file
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@ -0,0 +1,19 @@
// { dg-do compile }
// { dg-additional-options "-Ofast" }
// { dg-additional-options "-mavx2" { target x86_64-*-* i?86-*-* } }
extern long a;
extern int b[100];
extern unsigned c[5][5][2][4][2][2][3];
void fn1() {
for (int d = 0; d < 2; d = d + 1)
for (int e = 0; e < 5; e = e + 1)
for (int f = 0; f < 3; f = f + 1)
for (int g = 0; g < 3; g = g + 1)
for (int h = 0; h < 2; h = h + 1)
for (int i = 0; i < 4; i = i + 1)
for (int j = 0; j < 2; j = j + 1)
for (int k = 0; k < 2; k = k + 1)
for (int l = 0; l < 3; l = l + 1)
c[d][e][h][i][j][k][l] = a << b[f * 5 + g] + 4;
}

10
gcc/tree-vect-stmts.c
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@ -4532,6 +4532,16 @@ vectorizable_shift (gimple *stmt, gimple_stmt_iterator *gsi,
if (!operand_equal_p (gimple_assign_rhs2 (slpstmt), op1, 0))
scalar_shift_arg = false;
}
/* If the shift amount is computed by a pattern stmt we cannot
use the scalar amount directly thus give up and use a vector
shift. */
if (dt[1] == vect_internal_def)
{
gimple *def = SSA_NAME_DEF_STMT (op1);
if (is_pattern_stmt_p (vinfo_for_stmt (def)))
scalar_shift_arg = false;
}
}
else
{