From 8a73faf108721a76f55441f6d2a3937fff901b36 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Tue, 15 Feb 2011 16:50:43 +0000 Subject: Check zero/sign extended hard registers. gcc/ 2011-02-15 H.J. Lu PR middle-end/47725 * combine.c (cant_combine_insn_p): Check zero/sign extended hard registers. gcc/testsuite/ 2011-02-15 H.J. Lu PR middle-end/47725 * gcc.dg/torture/pr47725.c: New. From-SVN: r170179 --- gcc/ChangeLog | 6 ++++++ gcc/combine.c | 6 ++++++ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.dg/torture/pr47725.c | 16 ++++++++++++++++ 4 files changed, 33 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/torture/pr47725.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c360d46..8f4f569d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2011-02-15 H.J. Lu + + PR middle-end/47725 + * combine.c (cant_combine_insn_p): Check zero/sign extended + hard registers. + 2011-02-15 Richard Guenther PR tree-optimization/47743 diff --git a/gcc/combine.c b/gcc/combine.c index f9d33b3..67aecf1 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2137,6 +2137,12 @@ cant_combine_insn_p (rtx insn) return 0; src = SET_SRC (set); dest = SET_DEST (set); + if (GET_CODE (src) == ZERO_EXTEND + || GET_CODE (src) == SIGN_EXTEND) + src = XEXP (src, 0); + if (GET_CODE (dest) == ZERO_EXTEND + || GET_CODE (dest) == SIGN_EXTEND) + dest = XEXP (dest, 0); if (GET_CODE (src) == SUBREG) src = SUBREG_REG (src); if (GET_CODE (dest) == SUBREG) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index e60f6db..f9cb378 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2011-02-15 H.J. Lu + + PR middle-end/47725 + * gcc.dg/torture/pr47725.c: New. + 2011-02-15 Richard Guenther PR tree-optimization/47743 diff --git a/gcc/testsuite/gcc.dg/torture/pr47725.c b/gcc/testsuite/gcc.dg/torture/pr47725.c new file mode 100644 index 0000000..03d5d36 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr47725.c @@ -0,0 +1,16 @@ +/* { dg-do compile } */ + +struct _Unwind_Context +{ + void *reg[17]; + void *ra; +}; +extern void bar (struct _Unwind_Context *); +void +__frame_state_for (void *pc_target) +{ + struct _Unwind_Context context; + __builtin_memset (&context, 0, sizeof (struct _Unwind_Context)); + context.ra = pc_target; + bar (&context); +} -- cgit v1.1