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| author | Jiufu Guo <guojiufu@linux.ibm.com> | 2022-01-21 17:03:50 +0800 |
|---|---|---|
| committer | guojiufu <guojiufu@linux.ibm.com> | 2022-01-24 17:07:16 +0800 |
| commit | 634de54f9c421b7069865d0d7365ad97412f34bd (patch) | |
| tree | d398f1d6b4825e4e11aec55ffa722846d230422d /gcc | |
| parent | add6bb52e34f6036ace9f67ad8ad5b990adbc34a (diff) | |
| download | gcc-634de54f9c421b7069865d0d7365ad97412f34bd.zip gcc-634de54f9c421b7069865d0d7365ad97412f34bd.tar.gz gcc-634de54f9c421b7069865d0d7365ad97412f34bd.tar.bz2 | |
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.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr102087_1.c | 13 | ||||
| -rw-r--r-- | gcc/tree-ssa-loop-niter.cc | 17 |
2 files changed, 28 insertions, 2 deletions
diff --git a/gcc/testsuite/gcc.dg/pr102087_1.c b/gcc/testsuite/gcc.dg/pr102087_1.c new file mode 100644 index 0000000..ba4efe3 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr102087_1.c @@ -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]; +} + diff --git a/gcc/tree-ssa-loop-niter.cc b/gcc/tree-ssa-loop-niter.cc index b767056..21cc257 100644 --- a/gcc/tree-ssa-loop-niter.cc +++ b/gcc/tree-ssa-loop-niter.cc @@ -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, |