From 49fa02d9d67616530d588d5d4f0ac37be10ff70d Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Mon, 8 Jun 1998 01:53:56 +0000 Subject: [PATCH] reg-stack.c (subst_stack_regs_pat): Make sure the top of stack is the destination for conditional move insn. * reg-stack.c (subst_stack_regs_pat): Make sure the top of stack is the destination for conditional move insn. From-SVN: r20324 --- gcc/ChangeLog | 5 +++++ gcc/reg-stack.c | 9 +++++++++ 2 files changed, 14 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 39483849735..627a3e9c0e5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Mon Jun 8 02:49:23 1998 H.J. Lu (hjl@gnu.org) + + * reg-stack.c (subst_stack_regs_pat): Make sure the top of + stack is the destination for conditional move insn. + Mon Jun 8 01:21:13 1998 Jason Merrill * tree.h (TREE_VEC_END): Cast unused value to void. diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index 6496badbef8..ab400c51f1d 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -2344,6 +2344,15 @@ subst_stack_regs_pat (insn, regstack, pat) case IF_THEN_ELSE: /* This insn requires the top of stack to be the destination. */ + /* If the comparison operator is an FP comparison operator, + it is handled correctly by compare_for_stack_reg () who + will move the destination to the top of stack. But if the + comparison operator is not an FP comparison operator, we + have to handle it here. */ + if (get_hard_regnum (regstack, *dest) >= FIRST_STACK_REG + && REGNO (*dest) != regstack->reg[regstack->top]) + emit_swap_insn (insn, regstack, *dest); + src1 = get_true_reg (&XEXP (SET_SRC (pat), 1)); src2 = get_true_reg (&XEXP (SET_SRC (pat), 2)); -- 2.30.2