From: Alan Modra Date: Fri, 14 Dec 2018 09:03:50 +0000 (+1030) Subject: [RS6000] PR88311, mlongcall indirections are optimised away X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=04f4909a1e91c3fc350789aa5a46390df3aa89f3;p=gcc.git [RS6000] PR88311, mlongcall indirections are optimised away Masking CALL_LONG from the cookie was done in order to simplify and correct length attribute calculations for indirect calls at one point in my call series tidy when the indirect patterns used alternatives "0,n" on the cookie operand. (Leaving the CALL_LONG in place calculated the wrong length for long calls without fp args.) This is no longer necessary now that the indirect sysv call patterns explicitly test for the fp arg bits in their length attribute expressions. And without the CALL_LONG to disable insns like call_value_local_svsv, combine merrily replaces the indirect long call sequence with a direct call. As it should. This patch reinstates the CALL_LONG bit. PR rtl-optimization/88311 * config/rs6000/rs6000.c (rs6000_call_sysv): Do not mask cookie. (rs6000_sibcall_sysv): Likewise. From-SVN: r267123 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6222a3f74ef..aa260995e8d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-12-14 Alan Modra + + PR rtl-optimization/88311 + * config/rs6000/rs6000.c (rs6000_call_sysv): Do not mask cookie. + (rs6000_sibcall_sysv): Likewise. + 2018-12-14 Segher Boessenkool PR rtl-optimization/88001 diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 88f4f620ae4..c4682fce6cd 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -37978,8 +37978,7 @@ rs6000_call_sysv (rtx value, rtx func_desc, rtx tlsarg, rtx cookie) if (value != NULL_RTX) call[0] = gen_rtx_SET (value, call[0]); - unsigned int mask = CALL_V4_SET_FP_ARGS | CALL_V4_CLEAR_FP_ARGS; - call[1] = gen_rtx_USE (VOIDmode, GEN_INT (INTVAL (cookie) & mask)); + call[1] = gen_rtx_USE (VOIDmode, cookie); call[2] = gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (Pmode, LR_REGNO)); insn = gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (3, call)); @@ -38043,8 +38042,7 @@ rs6000_sibcall_sysv (rtx value, rtx func_desc, rtx tlsarg, rtx cookie) if (value != NULL_RTX) call[0] = gen_rtx_SET (value, call[0]); - unsigned int mask = CALL_V4_SET_FP_ARGS | CALL_V4_CLEAR_FP_ARGS; - call[1] = gen_rtx_USE (VOIDmode, GEN_INT (INTVAL (cookie) & mask)); + call[1] = gen_rtx_USE (VOIDmode, cookie); call[2] = simple_return_rtx; insn = gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (3, call));