diff options
Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-6.4/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-6.4/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-6.4/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch b/meta/recipes-devtools/gcc/gcc-6.4/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch new file mode 100644 index 0000000000..231f147619 --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-6.4/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch @@ -0,0 +1,51 @@ +From a582b0a53d1dc8604a201348b99ca8de48784e7e Mon Sep 17 00:00:00 2001 +From: jiwang <jiwang@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Thu, 12 May 2016 17:00:52 +0000 +Subject: [PATCH] [LRA] PR70904, relax the restriction on subreg reload for + wide mode + +2016-05-12 Jiong Wang <jiong.wang@arm.com> + +gcc/ + PR rtl-optimization/70904 + * lra-constraint.c (process_addr_reg): Relax the restriction on + subreg reload for wide mode. + +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@236181 138bc75d-0d04-0410-961f-82ee72b054a4 +--- +Upstream-Status: Backport +Signed-off-by: Khem Raj <raj.khem@gmail.com> + + gcc/lra-constraints.c | 16 +++++++++++++++- + 1 file changed, 15 insertions(+), 1 deletion(-) + +diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c +index f96fd458e23..73fb72a2ea5 100644 +--- a/gcc/lra-constraints.c ++++ b/gcc/lra-constraints.c +@@ -1326,7 +1326,21 @@ process_addr_reg (rtx *loc, bool check_only_p, rtx_insn **before, rtx_insn **aft + + subreg_p = GET_CODE (*loc) == SUBREG; + if (subreg_p) +- loc = &SUBREG_REG (*loc); ++ { ++ reg = SUBREG_REG (*loc); ++ mode = GET_MODE (reg); ++ ++ /* For mode with size bigger than ptr_mode, there unlikely to be "mov" ++ between two registers with different classes, but there normally will ++ be "mov" which transfers element of vector register into the general ++ register, and this normally will be a subreg which should be reloaded ++ as a whole. This is particularly likely to be triggered when ++ -fno-split-wide-types specified. */ ++ if (in_class_p (reg, cl, &new_class) ++ || GET_MODE_SIZE (mode) <= GET_MODE_SIZE (ptr_mode)) ++ loc = &SUBREG_REG (*loc); ++ } ++ + reg = *loc; + mode = GET_MODE (reg); + if (! REG_P (reg)) +-- +2.14.2 + |