From a06f01ba1e9b964c14ed6c63b56102d34ec6c45f Mon Sep 17 00:00:00 2001 From: James E Wilson Date: Sat, 20 Dec 2003 02:39:43 +0000 Subject: [PATCH] Patch for asm clobber of fp. * flow.c (mark_set_regs, case PARALLEL): Scan loop forwards. Add case for ASM_OPERANDS. * global.c (global_alloc): Set regs_ever_live for regs_asm_clobbered registers. From-SVN: r74869 --- gcc/ChangeLog | 7 +++++++ gcc/flow.c | 8 +++++++- gcc/global.c | 6 ++++++ 3 files changed, 20 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5528fd7fdef..eea65d3f8d7 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2003-12-19 James E Wilson + + * flow.c (mark_set_regs, case PARALLEL): Scan loop forwards. + Add case for ASM_OPERANDS. + * global.c (global_alloc): Set regs_ever_live for regs_asm_clobbered + registers. + 2003-12-19 Kazu Hirata * expr.c (check_max_integer_computation_mode): Remove. diff --git a/gcc/flow.c b/gcc/flow.c index 023fb1c8350..c146310cb0a 100644 --- a/gcc/flow.c +++ b/gcc/flow.c @@ -2468,7 +2468,9 @@ mark_set_regs (struct propagate_block_info *pbi, rtx x, rtx insn) { int i; - for (i = XVECLEN (x, 0) - 1; i >= 0; i--) + /* We must scan forwards. If we have an asm, we need to set + the PROP_ASM_SCAN flag before scanning the clobbers. */ + for (i = 0; i < XVECLEN (x, 0); i++) { rtx sub = XVECEXP (x, 0, i); switch (code = GET_CODE (sub)) @@ -2495,6 +2497,10 @@ mark_set_regs (struct propagate_block_info *pbi, rtx x, rtx insn) mark_set_1 (pbi, code, SET_DEST (sub), cond, insn, flags); break; + case ASM_OPERANDS: + flags |= PROP_ASM_SCAN; + break; + default: break; } diff --git a/gcc/global.c b/gcc/global.c index d19e87e5ed9..de765b36731 100644 --- a/gcc/global.c +++ b/gcc/global.c @@ -355,6 +355,8 @@ global_alloc (FILE *file) else if (cannot_elim) error ("%s cannot be used in asm here", reg_names[eliminables[i].from]); + else + regs_ever_live[eliminables[i].from] = 1; } #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM if (!regs_asm_clobbered[HARD_FRAME_POINTER_REGNUM]) @@ -366,6 +368,8 @@ global_alloc (FILE *file) else if (need_fp) error ("%s cannot be used in asm here", reg_names[HARD_FRAME_POINTER_REGNUM]); + else + regs_ever_live[HARD_FRAME_POINTER_REGNUM] = 1; #endif #else @@ -377,6 +381,8 @@ global_alloc (FILE *file) } else if (need_fp) error ("%s cannot be used in asm here", reg_names[FRAME_POINTER_REGNUM]); + else + regs_ever_live[FRAME_POINTER_REGNUM] = 1; #endif /* Track which registers have already been used. Start with registers -- 2.30.2