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.
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/* PR tree-optimization/102087 */
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/* { dg-do compile } */
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/* { dg-options "-O3 -fprefetch-loop-arrays -w" { target x86_64-*-* powerpc*-*-* } } */
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char **Gif_ClipImage_gfi_0;
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int Gif_ClipImage_gfi_1, Gif_ClipImage_y, Gif_ClipImage_shift;
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void Gif_ClipImage() {
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Gif_ClipImage_y = Gif_ClipImage_gfi_1 - 1;
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for (; Gif_ClipImage_y >= Gif_ClipImage_shift; Gif_ClipImage_y++)
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Gif_ClipImage_gfi_0[Gif_ClipImage_shift] =
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Gif_ClipImage_gfi_0[Gif_ClipImage_y];
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}
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@ -1579,8 +1579,21 @@ number_of_iterations_until_wrap (class loop *loop, tree type, affine_iv *iv0,
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{ IVbase - STEP, +, STEP } != bound
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{ IVbase - STEP, +, STEP } != bound
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Here, biasing IVbase by 1 step makes 'bound' be the value before wrap.
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Here, biasing IVbase by 1 step makes 'bound' be the value before wrap.
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*/
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*/
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niter->control.base = fold_build2 (MINUS_EXPR, niter_type,
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tree base_type = TREE_TYPE (niter->control.base);
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niter->control.base, niter->control.step);
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if (POINTER_TYPE_P (base_type))
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{
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tree utype = unsigned_type_for (base_type);
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niter->control.base
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= fold_build2 (MINUS_EXPR, utype,
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fold_convert (utype, niter->control.base),
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fold_convert (utype, niter->control.step));
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niter->control.base = fold_convert (base_type, niter->control.base);
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}
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else
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niter->control.base
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= fold_build2 (MINUS_EXPR, base_type, niter->control.base,
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niter->control.step);
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span = fold_build2 (MULT_EXPR, niter_type, niter->niter,
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span = fold_build2 (MULT_EXPR, niter_type, niter->niter,
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fold_convert (niter_type, niter->control.step));
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fold_convert (niter_type, niter->control.step));
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niter->bound = fold_build2 (PLUS_EXPR, niter_type, span,
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niter->bound = fold_build2 (PLUS_EXPR, niter_type, span,
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