diff options
| author | Christophe Lyon <christophe.lyon@linaro.org> | 2017-01-30 10:20:34 +0000 |
|---|---|---|
| committer | Yvan Roux <yvan.roux@linaro.org> | 2017-01-31 09:11:15 +0000 |
| commit | 3a3a5fdedabe435e7023e512af570ca1ed82a131 (patch) | |
| tree | 1bbf840f58a6489d401989a823c8895408206864 /gcc | |
| parent | 2b185a9d862869294261d2f46d64ed740f8d8435 (diff) | |
gcc/
Backport from trunk r244879.
2017-01-24 Eric Botcazou <ebotcazou@adacore.com>
PR target/77439
* config/arm/arm.c (arm_function_ok_for_sibcall): Add back restriction
for long calls with APCS frame and VFP.
gcc/testsuite/
Backport from trunk r244879.
2017-01-24 Eric Botcazou <ebotcazou@adacore.com>
* gcc.target/arm/vfp-longcall-apcs.c: New test.
Change-Id: I1663e7b52decbb7c5d9cb13c42136e10e44940b7
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/arm/arm.c | 8 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/arm/vfp-longcall-apcs.c | 32 |
2 files changed, 40 insertions, 0 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index ab512b52e77..ddca3b00cd7 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -6965,6 +6965,14 @@ arm_function_ok_for_sibcall (tree decl, tree exp) if (TARGET_VXWORKS_RTP && flag_pic && decl && !targetm.binds_local_p (decl)) return false; + /* ??? Cannot tail-call to long calls with APCS frame and VFP, because IP + may be used both as target of the call and base register for restoring + the VFP registers */ + if (TARGET_APCS_FRAME && TARGET_ARM + && TARGET_HARD_FLOAT + && decl && arm_is_long_call_p (decl)) + return false; + /* If we are interworking and the function is not declared static then we can't tail-call it unless we know that it exists in this compilation unit (since it might be a Thumb routine). */ diff --git a/gcc/testsuite/gcc.target/arm/vfp-longcall-apcs.c b/gcc/testsuite/gcc.target/arm/vfp-longcall-apcs.c new file mode 100644 index 00000000000..fa22b4da534 --- /dev/null +++ b/gcc/testsuite/gcc.target/arm/vfp-longcall-apcs.c @@ -0,0 +1,32 @@ +/* { dg-do run } */ +/* { dg-options "-mapcs-frame -O -foptimize-sibling-calls -ffunction-sections" } */ + +extern void abort (void); + +static __attribute__((noclone, noinline, long_call)) +int foo (int a, int b, int c, int d, double i) +{ + return a; +} + +static __attribute__((noclone, noinline)) +double baz (double i) +{ + return i; +} + +static __attribute__((noclone, noinline)) +int bar (int a, int b, int c, int d, double i, double j) +{ + double l = baz (i) * j; + return foo (a, b, c, d, l); +} + +int +main (void) +{ + if (bar (0, 0, 0, 0, 0.0, 0.0) != 0) + abort (); + + return 0; +} |