OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Update the type of control.base after changed 

This patch correct the type of niter->control.base, when it is updated
as a PLUS expr.
During build PLUS expr, the result type should align with the type of
the operands.

	PR tree-optimization/102087

gcc/ChangeLog:

	* tree-ssa-loop-niter.cc (number_of_iterations_until_wrap):
	Correct PLUS result type.

gcc/testsuite/ChangeLog:

	* gcc.dg/pr102087_1.c: New test.
This commit is contained in:
Jiufu Guo 2022-01-21 17:03:50 +08:00 committed by guojiufu
parent add6bb52e3
commit 634de54f9c
2 changed files with 28 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
gcc/testsuite/gcc.dg/pr102087_1.c Normal file
View File

@ -0,0 +1,13 @@
/* PR tree-optimization/102087 */
/* { dg-do compile } */
/* { dg-options "-O3 -fprefetch-loop-arrays -w" { target x86_64-*-* powerpc*-*-* } } */
char **Gif_ClipImage_gfi_0;
int Gif_ClipImage_gfi_1, Gif_ClipImage_y, Gif_ClipImage_shift;
void Gif_ClipImage() {
Gif_ClipImage_y = Gif_ClipImage_gfi_1 - 1;
for (; Gif_ClipImage_y >= Gif_ClipImage_shift; Gif_ClipImage_y++)
Gif_ClipImage_gfi_0[Gif_ClipImage_shift] =
Gif_ClipImage_gfi_0[Gif_ClipImage_y];
}

17
gcc/tree-ssa-loop-niter.cc
View File

@ -1579,8 +1579,21 @@ number_of_iterations_until_wrap (class loop *loop, tree type, affine_iv *iv0,
{ IVbase - STEP, +, STEP } != bound
Here, biasing IVbase by 1 step makes 'bound' be the value before wrap.
*/
niter->control.base = fold_build2 (MINUS_EXPR, niter_type,
niter->control.base, niter->control.step);
tree base_type = TREE_TYPE (niter->control.base);
if (POINTER_TYPE_P (base_type))
{
tree utype = unsigned_type_for (base_type);
niter->control.base
= fold_build2 (MINUS_EXPR, utype,
fold_convert (utype, niter->control.base),
fold_convert (utype, niter->control.step));
niter->control.base = fold_convert (base_type, niter->control.base);
}
else
niter->control.base
= fold_build2 (MINUS_EXPR, base_type, niter->control.base,
niter->control.step);
span = fold_build2 (MULT_EXPR, niter_type, niter->niter,
fold_convert (niter_type, niter->control.step));
niter->bound = fold_build2 (PLUS_EXPR, niter_type, span,