From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/gcc.target/i386/pr9771-1.c | 53 ++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 gcc/testsuite/gcc.target/i386/pr9771-1.c (limited to 'gcc/testsuite/gcc.target/i386/pr9771-1.c') diff --git a/gcc/testsuite/gcc.target/i386/pr9771-1.c b/gcc/testsuite/gcc.target/i386/pr9771-1.c new file mode 100644 index 000000000..37ec49022 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr9771-1.c @@ -0,0 +1,53 @@ +/* PR rtl-optimization/9771 */ +/* { dg-do run } */ +/* { dg-require-effective-target ilp32 } */ +/* { dg-options "-O2 -fomit-frame-pointer -ffixed-ebp" } */ + +extern void abort(void); +extern void exit(int); + +register long *B asm ("ebp"); + +long x = 10; +long y = 20; + +void bar(void) +{ + B = &y; +} + +void foo() +{ + long *adr = B; + long save = *adr; + + *adr = 123; + + bar(); + + *adr = save; +} + +/* This must not be inlined becuase main() requires the frame pointer + for stack alignment. */ +void test(void) __attribute__((noinline)); +void test(void) +{ + B = &x; + + foo(); + + if (x != 10 || y != 20) + abort(); + + /* We can't return, as our caller may assume %ebp is preserved! */ + /* We could save/restore it (like foo), but its easier to exit. */ + exit(0); +} + +int main() +{ + test(); + return 0; + +} -- cgit v1.2.3