re PR rtl-optimization/42475 (ICE at -O1 and above: internal compiler error: in simplify_subreg, at simplify-rtx.c:4954)
PR rtl-optimization/42475 * combine.c (make_compound_operation) <case SUBREG>: Use mode of SUBREG_REG (x) instead of tem's mode. * gcc.dg/pr42475.c: New test. From-SVN: r155430
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2009-12-23 Jakub Jelinek <jakub@redhat.com>
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PR rtl-optimization/42475
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* combine.c (make_compound_operation) <case SUBREG>: Use mode of
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SUBREG_REG (x) instead of tem's mode.
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2009-12-23 Jakub Jelinek <jakub@redhat.com>
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Cary Coutant <ccoutant@google.com>
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@ -7306,15 +7306,14 @@ make_compound_operation (rtx x, enum rtx_code in_code)
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tem = make_compound_operation (SUBREG_REG (x), in_code);
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{
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rtx simplified;
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simplified = simplify_subreg (GET_MODE (x), tem, GET_MODE (tem),
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SUBREG_BYTE (x));
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rtx simplified = simplify_subreg (mode, tem, GET_MODE (SUBREG_REG (x)),
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SUBREG_BYTE (x));
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if (simplified)
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tem = simplified;
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if (GET_CODE (tem) != GET_CODE (SUBREG_REG (x))
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&& GET_MODE_SIZE (mode) < GET_MODE_SIZE (GET_MODE (tem))
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&& GET_MODE_SIZE (mode) < GET_MODE_SIZE (GET_MODE (SUBREG_REG (x)))
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&& subreg_lowpart_p (x))
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{
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rtx newer = force_to_mode (tem, mode, ~(HOST_WIDE_INT) 0,
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@ -1,3 +1,8 @@
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2009-12-23 Jakub Jelinek <jakub@redhat.com>
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PR rtl-optimization/42475
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* gcc.dg/pr42475.c: New test.
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2009-12-23 Jakub Jelinek <jakub@redhat.com>
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Cary Coutant <ccoutant@google.com>
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@ -0,0 +1,28 @@
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/* PR rtl-optimization/42475 */
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/* { dg-do compile } */
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/* { dg-options "-O2" } */
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typedef struct { float x, y; } B;
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typedef struct { float z; } C;
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typedef struct { B b; C c; } D;
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B
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foo (float x, float y)
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{
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B b = { .x = x, .y = y };
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return b;
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}
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B
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bar (B b, B y)
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{
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return foo (y.x + b.x, b.y);
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}
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B
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baz (D p)
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{
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D d = { };
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B y = bar (foo (0, (p.c.z) / 2), d.b);
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return y;
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}
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