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| author | Richard Sandiford <richard.sandiford@arm.com> | 2024-02-21 11:12:29 +0000 |
|---|---|---|
| committer | Richard Sandiford <richard.sandiford@arm.com> | 2024-02-21 11:12:29 +0000 |
| commit | 38004cf8699a82790d83846e3bd37e151e709ede (patch) | |
| tree | 5fe19dd18dc93c6941420be20a7085663ace2aeb | |
| parent | 3651b1b23fdd30fd00f0cd08ec4806dd16d1f3d3 (diff) | |
| download | gcc-38004cf8699a82790d83846e3bd37e151e709ede.zip gcc-38004cf8699a82790d83846e3bd37e151e709ede.tar.gz gcc-38004cf8699a82790d83846e3bd37e151e709ede.tar.bz2 | |
aarch64: More SME vs -mtrack-speculation
The sequence to commit a lazy save includes a branch based on
whether TPIDR2_EL0 is zero. The code assumed that CBZ could
be used for this, but that instruction is forbidden when
-mtrack-speculation is being used.
gcc/
* config/aarch64/aarch64.cc (aarch64_mode_emit_local_sme_state):
Use aarch64_gen_compare_zero_and_branch rather than emitting
a CBZ directly.
gcc/testsuite/
* gcc.target/aarch64/sme/locally_streaming_1_ts.c: New test.
* gcc.target/aarch64/sme/sibcall_7_ts.c: Likewise.
| -rw-r--r-- | gcc/config/aarch64/aarch64.cc | 3 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/aarch64/sme/locally_streaming_1_ts.c | 3 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/aarch64/sme/sibcall_7_ts.c | 3 |
3 files changed, 8 insertions, 1 deletions
diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc index 8a3aa98..28d1555 100644 --- a/gcc/config/aarch64/aarch64.cc +++ b/gcc/config/aarch64/aarch64.cc @@ -29344,7 +29344,8 @@ aarch64_mode_emit_local_sme_state (aarch64_local_sme_state mode, auto tmp_reg = gen_reg_rtx (DImode); emit_insn (gen_aarch64_read_tpidr2 (tmp_reg)); auto label = gen_label_rtx (); - auto jump = emit_jump_insn (gen_aarch64_cbeqdi1 (tmp_reg, label)); + rtx branch = aarch64_gen_compare_zero_and_branch (EQ, tmp_reg, label); + auto jump = emit_jump_insn (branch); JUMP_LABEL (jump) = label; emit_insn (gen_aarch64_tpidr2_save ()); emit_insn (gen_aarch64_clear_tpidr2 ()); diff --git a/gcc/testsuite/gcc.target/aarch64/sme/locally_streaming_1_ts.c b/gcc/testsuite/gcc.target/aarch64/sme/locally_streaming_1_ts.c new file mode 100644 index 0000000..25ac345 --- /dev/null +++ b/gcc/testsuite/gcc.target/aarch64/sme/locally_streaming_1_ts.c @@ -0,0 +1,3 @@ +// { dg-options "-O -fomit-frame-pointer -mtrack-speculation" } + +#include "locally_streaming_1.c" diff --git a/gcc/testsuite/gcc.target/aarch64/sme/sibcall_7_ts.c b/gcc/testsuite/gcc.target/aarch64/sme/sibcall_7_ts.c new file mode 100644 index 0000000..4b47678 --- /dev/null +++ b/gcc/testsuite/gcc.target/aarch64/sme/sibcall_7_ts.c @@ -0,0 +1,3 @@ +// { dg-options "-O2 -mtrack-speculation" } + +#include "sibcall_7.c" |