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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/59471] [4.9 Regression] ICE using vector extensions (non-top-level BIT_FIELD_REF, IMAGPART_EXPR or REALPART_EXPR) Date: Fri, 20 Dec 2013 14:26:00 -0000 [thread overview] Message-ID: <bug-59471-4-Bt87nd2GJZ@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-59471-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59471 --- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> --- Testing Index: gimplify.c =================================================================== --- gimplify.c (revision 205891) +++ gimplify.c (working copy) @@ -7358,12 +7358,22 @@ gimplify_expr (tree *expr_p, gimple_seq TREE_TYPE (*expr_p)); break; + case VIEW_CONVERT_EXPR: + if (is_gimple_reg_type (TREE_TYPE (*expr_p)) + && is_gimple_reg_type (TREE_TYPE (TREE_OPERAND (*expr_p, 0)))) + { + ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, + post_p, is_gimple_val, fb_rvalue); + recalculate_side_effects (*expr_p); + break; + } + /* Fallthru. */ + case ARRAY_REF: case ARRAY_RANGE_REF: case REALPART_EXPR: case IMAGPART_EXPR: case COMPONENT_REF: - case VIEW_CONVERT_EXPR: ret = gimplify_compound_lval (expr_p, pre_p, post_p, fallback ? fallback : fb_rvalue); break; @@ -7709,10 +7719,17 @@ gimplify_expr (tree *expr_p, gimple_seq break; case BIT_FIELD_REF: - ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, - post_p, is_gimple_lvalue, fb_either); - recalculate_side_effects (*expr_p); - break; + { + if (is_gimple_reg_type (TREE_TYPE (*expr_p)) + && is_gimple_reg_type (TREE_TYPE (TREE_OPERAND (*expr_p, 0)))) + ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, + post_p, is_gimple_val, fb_rvalue); + else + ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, + post_p, is_gimple_lvalue, fb_either); + recalculate_side_effects (*expr_p); + break; + } case TARGET_MEM_REF: { code-generation for the testcase is awkward though: foo: .LFB0: .cfi_startproc movaps %xmm0, -24(%rsp) movq -24(%rsp), %rax movq %rax, -24(%rsp) movq -24(%rsp), %xmm0 ret not sure why RTL cannot recover here, we expand from foo (uint16x8_t x) { vector(2) long unsigned int _2; long unsigned int _3; uint8x8_t _4; <bb 2>: _2 = VIEW_CONVERT_EXPR<vector(2) long unsigned int>(x_5(D)); _3 = BIT_FIELD_REF <_2, 64, 0>; _4 = VIEW_CONVERT_EXPR<uint8x8_t>(_3); return _4; with forwprop we could re-write this into _4 = BIT_FIELD_REF <x_5(D), 64, 0>; as BIT_FIELD_REF is allowed to select uint8x8_t from uint16x8_t directly.
next prev parent reply other threads:[~2013-12-20 14:26 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-12-11 15:28 [Bug tree-optimization/59471] New: " jgreenhalgh at gcc dot gnu.org 2013-12-13 10:54 ` [Bug middle-end/59471] [4.9 Regression] " rguenth at gcc dot gnu.org 2013-12-17 9:48 ` jakub at gcc dot gnu.org 2013-12-17 20:54 ` glisse at gcc dot gnu.org 2013-12-17 20:56 ` jakub at gcc dot gnu.org 2013-12-17 21:10 ` glisse at gcc dot gnu.org 2013-12-19 13:04 ` rguenth at gcc dot gnu.org 2013-12-19 13:04 ` rguenth at gcc dot gnu.org 2013-12-19 13:05 ` rguenth at gcc dot gnu.org 2013-12-20 14:26 ` rguenth at gcc dot gnu.org [this message] 2014-01-08 8:59 ` rguenth at gcc dot gnu.org 2014-01-08 9:00 ` rguenth at gcc dot gnu.org 2014-01-08 22:33 ` jakub at gcc dot gnu.org
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