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2003-11-27 Eric Botcazou <ebotcazou@libertysurf.fr>
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PR optimization/13041
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* final.c (frame_pointer_needed): Fix comment.
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* reload1.c (reload): Decrease alignment of the frame
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pointer if it was used for register allocation.
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--- gcc/final.c 1 Nov 2003 00:48:50 -0000 1.294
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+++ gcc/final.c 27 Nov 2003 06:45:24 -0000 1.295
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@@ -171,8 +171,8 @@ CC_STATUS cc_prev_status;
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char regs_ever_live[FIRST_PSEUDO_REGISTER];
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/* Nonzero means current function must be given a frame pointer.
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- Set in stmt.c if anything is allocated on the stack there.
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- Set in reload1.c if anything is allocated on the stack there. */
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+ Initialized in function.c to 0. Set only in reload1.c as per
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+ the needs of the function. */
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int frame_pointer_needed;
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--- gcc/reload1.c 21 Nov 2003 05:49:05 -0000 1.413
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+++ gcc/reload1.c 27 Nov 2003 06:45:25 -0000 1.414
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@@ -1241,6 +1241,14 @@ reload (rtx first, int global)
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by this, so unshare everything here. */
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unshare_all_rtl_again (first);
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+#ifdef STACK_BOUNDARY
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+ /* init_emit has set the alignment of the hard frame pointer
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+ to STACK_BOUNDARY. It is very likely no longer valid if
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+ the hard frame pointer was used for register allocation. */
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+ if (!frame_pointer_needed)
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+ REGNO_POINTER_ALIGN (HARD_FRAME_POINTER_REGNUM) = BITS_PER_UNIT;
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+#endif
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+
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return failure;
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}
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