From 5bed1dca2160c7761b2274c33088cece233d5ac8 Mon Sep 17 00:00:00 2001 From: raksit Date: Fri, 11 Jan 2008 04:20:32 +0000 Subject: [PATCH] gcc/ChangeLog PR rtl-optimization/27971 * combine.c (find_split_point): introduced a new split for certain types of mem rtx. gcc/testsuite/ChangeLog PR rtl-optimization/27971 * gcc.target/i386/pr27971.c: New testcase. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@131460 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 6 ++++++ gcc/combine.c | 9 +++++++++ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.target/i386/pr27971.c | 12 ++++++++++++ 4 files changed, 32 insertions(+) create mode 100644 gcc/testsuite/gcc.target/i386/pr27971.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5a47a8c..0e5dbd6 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2008-01-10 Raksit Ashok + + PR rtl-optimization/27971 + * combine.c (find_split_point): introduced a new split for certain + types of mem rtx. + 2008-01-10 DJ Delorie * config/m32c/m32c.c (m32c_hard_regno_nregs_1): Renamed from... diff --git a/gcc/combine.c b/gcc/combine.c index b3d064d..43623a4 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -3967,6 +3967,15 @@ find_split_point (rtx *loc, rtx insn) && OBJECT_P (SUBREG_REG (XEXP (XEXP (x, 0), 0))))) return &XEXP (XEXP (x, 0), 0); } + + /* If we have a PLUS whose first operand is complex, try computing it + separately by making a split there. */ + if (GET_CODE (XEXP (x, 0)) == PLUS + && ! memory_address_p (GET_MODE (x), XEXP (x, 0)) + && ! OBJECT_P (XEXP (XEXP (x, 0), 0)) + && ! (GET_CODE (XEXP (XEXP (x, 0), 0)) == SUBREG + && OBJECT_P (SUBREG_REG (XEXP (XEXP (x, 0), 0))))) + return &XEXP (XEXP (x, 0), 0); break; case SET: diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 7546770..1e1207b 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2008-01-10 Raksit Ashok + + PR rtl-optimization/27971 + * gcc.target/i386/pr27971.c: New testcase. + 2008-01-10 Paul Thomas PR fortran/34396 diff --git a/gcc/testsuite/gcc.target/i386/pr27971.c b/gcc/testsuite/gcc.target/i386/pr27971.c new file mode 100644 index 0000000..8c706ad --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr27971.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ + +unsigned array[4]; + +unsigned foo(unsigned long x) +{ + return array[(x>>2)&3ul]; +} + +/* { dg-final { scan-assembler-not "shr\[^\\n\]*2" } } */ +/* { dg-final { scan-assembler "and\[^\\n\]*12" } } */ -- 2.7.4