diff options
| author | wilco <wilco@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-07-24 18:06:37 +0000 |
|---|---|---|
| committer | wilco <wilco@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-07-24 18:06:37 +0000 |
| commit | c80c7b3fc74fc3d37bfbecd116c7b5df0297c047 (patch) | |
| tree | 8022ed66e237c03caf3f6178e0821d7d27350ecf | |
| parent | d782c3b8b57df075182da39c27e593b88c912510 (diff) | |
| download | gcc-c80c7b3fc74fc3d37bfbecd116c7b5df0297c047.tar.gz | |
Fix PR79041
As described in PR79041, -mcmodel=large -mpc-relative-literal-loads
may be used to avoid generating ADRP/ADD or ADRP/LDR. However both
trunk and GCC7 may still emit ADRP for some constant pool literals.
Fix this by adding a aarch64_pcrelative_literal_loads check.
gcc/
PR target/79041
* config/aarch64/aarch64.c (aarch64_classify_symbol):
Avoid SYMBOL_SMALL_ABSOLUTE for literals with pc-relative literals
gcc/testsuite/
* gcc.target/aarch64/pr79041-2.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@250478 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/aarch64/pr79041-2.c | 10 |
4 files changed, 22 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c77ba24254c..e929c4d50d9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2017-07-24 Wilco Dijkstra <wdijkstr@arm.com> + + PR target/79041 + * config/aarch64/aarch64.c (aarch64_classify_symbol): + Avoid SYMBOL_SMALL_ABSOLUTE for literals with pc-relative literals. + 2017-07-24 Carl Love <cel@us.ibm.com> * config/rs6000/rs6000-c.c: Add support for built-in functions diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index b8a4160d9de..d753666ef67 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -10193,7 +10193,7 @@ aarch64_classify_symbol (rtx x, rtx offset) /* This is alright even in PIC code as the constant pool reference is always PC relative and within the same translation unit. */ - if (CONSTANT_POOL_ADDRESS_P (x)) + if (!aarch64_pcrelative_literal_loads && CONSTANT_POOL_ADDRESS_P (x)) return SYMBOL_SMALL_ABSOLUTE; else return SYMBOL_FORCE_TO_MEM; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index bb4302f0541..de46deffdcf 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2017-07-24 Wilco Dijkstra <wdijkstr@arm.com> + + PR target/79041 + * gcc.target/aarch64/pr79041-2.c: New test. + 2017-07-24 Carl Love <cel@us.ibm.com> * gcc.target/powerpc/builtins-3-p9-runnable.c: Add new test file for diff --git a/gcc/testsuite/gcc.target/aarch64/pr79041-2.c b/gcc/testsuite/gcc.target/aarch64/pr79041-2.c new file mode 100644 index 00000000000..e7899725bad --- /dev/null +++ b/gcc/testsuite/gcc.target/aarch64/pr79041-2.c @@ -0,0 +1,10 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mcmodel=large -mpc-relative-literal-loads" } */ + +__int128 +t (void) +{ + return (__int128)1 << 80; +} + +/* { dg-final { scan-assembler "adr" } } */ |