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authorRichard Sandiford <richard.sandiford@arm.com>2024-02-21 11:12:29 +0000
committerRichard Sandiford <richard.sandiford@arm.com>2024-02-21 11:12:29 +0000
commit38004cf8699a82790d83846e3bd37e151e709ede (patch)
tree5fe19dd18dc93c6941420be20a7085663ace2aeb /libgcc
parent3651b1b23fdd30fd00f0cd08ec4806dd16d1f3d3 (diff)
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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.
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