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| author | Jakub Jelinek <jakub@redhat.com> | 2022-03-16 11:04:16 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2022-03-16 11:04:16 +0100 |
| commit | 952155629ca1a4dfe7c7b26e53d118a9b853ed4a (patch) | |
| tree | 3d59c4d677475bf53a6b6e2259bbf0b6ea0b1b78 | |
| parent | 6aef670e486e60e9f492752ff25ff3ed6058bc3b (diff) | |
| download | gcc-952155629ca1a4dfe7c7b26e53d118a9b853ed4a.zip gcc-952155629ca1a4dfe7c7b26e53d118a9b853ed4a.tar.gz gcc-952155629ca1a4dfe7c7b26e53d118a9b853ed4a.tar.bz2 | |
aarch64: Fix up RTL sharing bug in aarch64_load_symref_appropriately [PR104910]
We unshare all RTL created during expansion, but when
aarch64_load_symref_appropriately is called after expansion like in the
following testcases, we use imm in both HIGH and LO_SUM operands.
If imm is some RTL that shouldn't be shared like a non-sharable CONST,
we get at least with --enable-checking=rtl a checking ICE, otherwise might
just get silently wrong code.
The following patch fixes that by copying it if it can't be shared.
2022-03-16 Jakub Jelinek <jakub@redhat.com>
PR target/104910
* config/aarch64/aarch64.cc (aarch64_load_symref_appropriately): Copy
imm rtx.
* gcc.dg/pr104910.c: New test.
| -rw-r--r-- | gcc/config/aarch64/aarch64.cc | 2 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr104910.c | 14 |
2 files changed, 15 insertions, 1 deletions
diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc index dbeaaf4..7a03375 100644 --- a/gcc/config/aarch64/aarch64.cc +++ b/gcc/config/aarch64/aarch64.cc @@ -3971,7 +3971,7 @@ aarch64_load_symref_appropriately (rtx dest, rtx imm, if (can_create_pseudo_p ()) tmp_reg = gen_reg_rtx (mode); - emit_move_insn (tmp_reg, gen_rtx_HIGH (mode, imm)); + emit_move_insn (tmp_reg, gen_rtx_HIGH (mode, copy_rtx (imm))); emit_insn (gen_add_losym (dest, tmp_reg, imm)); return; } diff --git a/gcc/testsuite/gcc.dg/pr104910.c b/gcc/testsuite/gcc.dg/pr104910.c new file mode 100644 index 0000000..10fed81 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr104910.c @@ -0,0 +1,14 @@ +/* PR target/104910 */ +/* { dg-do compile } */ +/* { dg-options "-Os -fno-forward-propagate" } */ +/* { dg-additional-options "-fstack-protector-all" { target fstack_protector } } */ + +void +bar (void); + +void +foo (int x) +{ + if (x) + bar (); +} |