On Thu, May 21, 2015 at 2:59 PM, H.J. Lu <hjl.to...@gmail.com> wrote: > X32 doesn't support indirect branch via 32-bit memory slot since > indirect branch will load 64-bit address from 64-bit memory slot. > Since x32 GOT slot is 64-bit, we should allow indirect branch via GOT > slot for x32. > > I am testing it on x32. OK for master if there is no regression? > > Thanks. > > > H.J. > -- > gcc/ > > PR target/66232 > * config/i386/constraints.md (Bg): Add a constraint for x32 > call and sibcall memory operand. > * config/i386/i386.md (*call_x32): New pattern. > (*sibcall_x32): Likewise. > (*call_value_x32): Likewise. > (*sibcall_value_x32): Likewise. > * config/i386/predicates.md (x32_sibcall_memory_operand): New > predicate. > (x32_call_insn_operand): Likewise. > (x32_sibcall_insn_operand): Likewise. > > gcc/testsuite/ > > PR target/66232 > * gcc.target/i386/pr66232-1.c: New test. > * gcc.target/i386/pr66232-2.c: Likewise. > * gcc.target/i386/pr66232-3.c: Likewise. > * gcc.target/i386/pr66232-4.c: Likewise.
OK. maybe you should use match_code some more in x32_sibcall_memory_operand, e.g. (match_code "constant" "0") (match_code "unspec" "00") But it is up to you, since XINT doesn't fit in this scheme... Thanks, Uros. > gcc/config/i386/constraints.md | 6 ++++++ > gcc/config/i386/i386.md | 36 > +++++++++++++++++++++++++++++++ > gcc/config/i386/predicates.md | 26 ++++++++++++++++++++++ > gcc/testsuite/gcc.target/i386/pr66232-1.c | 13 +++++++++++ > gcc/testsuite/gcc.target/i386/pr66232-2.c | 14 ++++++++++++ > gcc/testsuite/gcc.target/i386/pr66232-3.c | 13 +++++++++++ > gcc/testsuite/gcc.target/i386/pr66232-4.c | 13 +++++++++++ > 7 files changed, 121 insertions(+) > create mode 100644 gcc/testsuite/gcc.target/i386/pr66232-1.c > create mode 100644 gcc/testsuite/gcc.target/i386/pr66232-2.c > create mode 100644 gcc/testsuite/gcc.target/i386/pr66232-3.c > create mode 100644 gcc/testsuite/gcc.target/i386/pr66232-4.c > > diff --git a/gcc/config/i386/constraints.md b/gcc/config/i386/constraints.md > index 2271bd1..7be8917 100644 > --- a/gcc/config/i386/constraints.md > +++ b/gcc/config/i386/constraints.md > @@ -146,10 +146,16 @@ > "@internal Lower SSE register when avoiding REX prefix and all SSE > registers otherwise.") > > ;; We use the B prefix to denote any number of internal operands: > +;; g Call and sibcall memory operand, valid for TARGET_X32 > ;; s Sibcall memory operand, not valid for TARGET_X32 > ;; w Call memory operand, not valid for TARGET_X32 > ;; z Constant call address operand. > > +(define_constraint "Bg" > + "@internal Call/sibcall memory operand for x32." > + (and (match_test "TARGET_X32") > + (match_operand 0 "x32_sibcall_memory_operand"))) > + > (define_constraint "Bs" > "@internal Sibcall memory operand." > (and (not (match_test "TARGET_X32")) > diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md > index aefca43..a1ae05a 100644 > --- a/gcc/config/i386/i386.md > +++ b/gcc/config/i386/i386.md > @@ -11659,6 +11659,14 @@ > "* return ix86_output_call_insn (insn, operands[0]);" > [(set_attr "type" "call")]) > > +(define_insn "*call_x32" > + [(call (mem:QI (zero_extend:DI > + (match_operand:SI 0 "x32_call_insn_operand" "Bg"))) > + (match_operand 1))] > + "TARGET_X32 && !SIBLING_CALL_P (insn)" > + "* return ix86_output_call_insn (insn, operands[0]);" > + [(set_attr "type" "call")]) > + > (define_insn "*sibcall" > [(call (mem:QI (match_operand:W 0 "sibcall_insn_operand" "UBsBz")) > (match_operand 1))] > @@ -11666,6 +11674,14 @@ > "* return ix86_output_call_insn (insn, operands[0]);" > [(set_attr "type" "call")]) > > +(define_insn "*sibcall_x32" > + [(call (mem:QI (zero_extend:DI > + (match_operand:SI 0 "x32_sibcall_insn_operand" "Bg"))) > + (match_operand 1))] > + "TARGET_X32 && SIBLING_CALL_P (insn)" > + "* return ix86_output_call_insn (insn, operands[0]);" > + [(set_attr "type" "call")]) > + > (define_insn "*sibcall_memory" > [(call (mem:QI (match_operand:W 0 "memory_operand" "m")) > (match_operand 1)) > @@ -11825,6 +11841,16 @@ > "* return ix86_output_call_insn (insn, operands[1]);" > [(set_attr "type" "callv")]) > > +(define_insn "*call_value_x32" > + [(set (match_operand 0) > + (call (mem:QI > + (zero_extend:DI > + (match_operand:SI 1 "x32_call_insn_operand" "Bg"))) > + (match_operand 2)))] > + "TARGET_X32 && !SIBLING_CALL_P (insn)" > + "* return ix86_output_call_insn (insn, operands[1]);" > + [(set_attr "type" "callv")]) > + > (define_insn "*sibcall_value" > [(set (match_operand 0) > (call (mem:QI (match_operand:W 1 "sibcall_insn_operand" "UBsBz")) > @@ -11833,6 +11859,16 @@ > "* return ix86_output_call_insn (insn, operands[1]);" > [(set_attr "type" "callv")]) > > +(define_insn "*sibcall_value_x32" > + [(set (match_operand 0) > + (call (mem:QI > + (zero_extend:DI > + (match_operand:SI 1 "x32_sibcall_insn_operand" "Bg"))) > + (match_operand 2)))] > + "TARGET_X32 && SIBLING_CALL_P (insn)" > + "* return ix86_output_call_insn (insn, operands[1]);" > + [(set_attr "type" "callv")]) > + > (define_insn "*sibcall_value_memory" > [(set (match_operand 0) > (call (mem:QI (match_operand:W 1 "memory_operand" "m")) > diff --git a/gcc/config/i386/predicates.md b/gcc/config/i386/predicates.md > index 26dd3e1..40fdd20 100644 > --- a/gcc/config/i386/predicates.md > +++ b/gcc/config/i386/predicates.md > @@ -606,6 +606,32 @@ > (and (not (match_test "TARGET_X32")) > (match_operand 0 "sibcall_memory_operand")))) > > +;; Return true if OP is a memory operand that can be used in x32 calls > +;; and sibcalls. Only th 64-bit GOT slot is allowed. > +(define_predicate "x32_sibcall_memory_operand" > + (and (match_operand 0 "memory_operand") > + (match_test "CONSTANT_P (XEXP (op, 0))") > + (match_test "GET_CODE (XEXP (XEXP (op, 0), 0)) == UNSPEC") > + (match_test "XINT (XEXP (XEXP (op, 0), 0), 1) == UNSPEC_GOTPCREL"))) > + > +;; Test for a valid operand for an x32 call instruction. > +;; Allow constant call address operands in Pmode only. > +(define_special_predicate "x32_call_insn_operand" > + (ior (match_test "constant_call_address_operand > + (op, mode == VOIDmode ? mode : Pmode)") > + (match_operand 0 "call_register_no_elim_operand") > + (and (match_test "TARGET_X32") > + (match_operand 0 "x32_sibcall_memory_operand")))) > + > +;; Similarly, but for tail x32 calls, in which we cannot allow memory > +;; references. > +(define_special_predicate "x32_sibcall_insn_operand" > + (ior (match_test "constant_call_address_operand > + (op, mode == VOIDmode ? mode : Pmode)") > + (match_operand 0 "register_no_elim_operand") > + (and (match_test "TARGET_X32") > + (match_operand 0 "x32_sibcall_memory_operand")))) > + > ;; Match exactly zero. > (define_predicate "const0_operand" > (match_code "const_int,const_wide_int,const_double,const_vector") > diff --git a/gcc/testsuite/gcc.target/i386/pr66232-1.c > b/gcc/testsuite/gcc.target/i386/pr66232-1.c > new file mode 100644 > index 0000000..ba4a5ef > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/pr66232-1.c > @@ -0,0 +1,13 @@ > +/* { dg-do compile { target *-*-linux* } } */ > +/* { dg-options "-O2 -fpic -fno-plt" } */ > + > +extern void bar (void); > + > +void > +foo (void) > +{ > + bar (); > +} > + > +/* { dg-final { scan-assembler "jmp\[ \t\]*.bar@GOTPCREL" { target { ! ia32 > } } } } */ > +/* { dg-final { scan-assembler "call\[ \t\]*.bar@GOT\\(" { target ia32 } } } > */ > diff --git a/gcc/testsuite/gcc.target/i386/pr66232-2.c > b/gcc/testsuite/gcc.target/i386/pr66232-2.c > new file mode 100644 > index 0000000..f05d7c5 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/pr66232-2.c > @@ -0,0 +1,14 @@ > +/* { dg-do compile { target *-*-linux* } } */ > +/* { dg-options "-O2 -fpic -fno-plt" } */ > + > +extern void bar (void); > + > +int > +foo (void) > +{ > + bar (); > + return 0; > +} > + > +/* { dg-final { scan-assembler "call\[ \t\]*.bar@GOTPCREL" { target { ! ia32 > } } } } */ > +/* { dg-final { scan-assembler "call\[ \t\]*.bar@GOT\\(" { target ia32 } } } > */ > diff --git a/gcc/testsuite/gcc.target/i386/pr66232-3.c > b/gcc/testsuite/gcc.target/i386/pr66232-3.c > new file mode 100644 > index 0000000..ee3176c > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/pr66232-3.c > @@ -0,0 +1,13 @@ > +/* { dg-do compile { target *-*-linux* } } */ > +/* { dg-options "-O2 -fpic -fno-plt" } */ > + > +extern int bar (void); > + > +int > +foo (void) > +{ > + return bar (); > +} > + > +/* { dg-final { scan-assembler "jmp\[ \t\]*.bar@GOTPCREL" { target { ! ia32 > } } } } */ > +/* { dg-final { scan-assembler "call\[ \t\]*.bar@GOT\\(" { target ia32 } } } > */ > diff --git a/gcc/testsuite/gcc.target/i386/pr66232-4.c > b/gcc/testsuite/gcc.target/i386/pr66232-4.c > new file mode 100644 > index 0000000..5fa0ded > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/pr66232-4.c > @@ -0,0 +1,13 @@ > +/* { dg-do compile { target *-*-linux* } } */ > +/* { dg-options "-O2 -fpic -fno-plt" } */ > + > +extern int bar (void); > + > +int > +foo (void) > +{ > + return bar () + 1; > +} > + > +/* { dg-final { scan-assembler "call\[ \t\]*.bar@GOTPCREL" { target { ! ia32 > } } } } */ > +/* { dg-final { scan-assembler "call\[ \t\]*.bar@GOT\\(" { target ia32 } } } > */ > -- > 2.1.0 >