From bdccc9c4e263fcf45d3da3fb646c5ae40b6b924e Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Sun, 29 May 2011 17:51:03 +0000 Subject: [PATCH] re PR target/43700 (global register variables defect) gcc/ PR target/43700 * config/mips/mips.c (mips_cfun_call_saved_reg_p): Handle global registers. gcc/testsuite/ * gcc.target/mips/reg-var-1.c: New test. From-SVN: r174408 --- gcc/ChangeLog | 6 ++++++ gcc/config/mips/mips.c | 5 +++++ gcc/testsuite/ChangeLog | 4 ++++ gcc/testsuite/gcc.target/mips/reg-var-1.c | 16 ++++++++++++++++ 4 files changed, 31 insertions(+) create mode 100644 gcc/testsuite/gcc.target/mips/reg-var-1.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 996e0d916dac..053b6d1c67e1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2011-05-29 Richard Sandiford + + PR target/43700 + * config/mips/mips.c (mips_cfun_call_saved_reg_p): Handle global + registers. + 2011-05-29 Richard Sandiford PR target/43995 diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c index d3c0709074e9..fd9e4b39c59a 100644 --- a/gcc/config/mips/mips.c +++ b/gcc/config/mips/mips.c @@ -9007,6 +9007,11 @@ mips_interrupt_extra_call_saved_reg_p (unsigned int regno) static bool mips_cfun_call_saved_reg_p (unsigned int regno) { + /* If the user makes an ordinarily-call-saved register global, + that register is no longer call-saved. */ + if (global_regs[regno]) + return false; + /* Interrupt handlers need to save extra registers. */ if (cfun->machine->interrupt_handler_p && mips_interrupt_extra_call_saved_reg_p (regno)) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 7763aa8515df..7d23efe07691 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2011-05-29 Richard Sandiford + + * gcc.target/mips/reg-var-1.c: New test. + 2011-05-25 Uros Bizjak PR target/49133 diff --git a/gcc/testsuite/gcc.target/mips/reg-var-1.c b/gcc/testsuite/gcc.target/mips/reg-var-1.c new file mode 100644 index 000000000000..d8b8118103ac --- /dev/null +++ b/gcc/testsuite/gcc.target/mips/reg-var-1.c @@ -0,0 +1,16 @@ +/* { dg-do run } */ +register int g asm ("$18"); + +void __attribute__((noinline)) +test (void) +{ + g = g + 1; +} + +int +main (void) +{ + g = 2; + test (); + return g != 3; +} -- 2.47.2