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| author | Richard Earnshaw <rearnsha@arm.com> | 2018-07-31 17:35:50 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2018-07-31 17:35:50 +0000 |
| commit | def745b2d3785d8b037e8ffc39b5638ecc5fa4d4 (patch) | |
| tree | 424d39aa4f9d1851b4d6a06a84adca8736bf904a | |
| parent | bb8b0096829209874018c0997f340a43ca8b0461 (diff) | |
| download | gcc-def745b2d3785d8b037e8ffc39b5638ecc5fa4d4.zip gcc-def745b2d3785d8b037e8ffc39b5638ecc5fa4d4.tar.gz gcc-def745b2d3785d8b037e8ffc39b5638ecc5fa4d4.tar.bz2 | |
AArch64 - add speculation barrier
Similar to Arm, this adds an unconditional speculation barrier for AArch64.
* config/aarch64.md (unspecv): Add UNSPECV_SPECULAION_BARRIER.
(speculation_barrier): New insn.
From-SVN: r263170
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.md | 10 |
2 files changed, 15 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 63971fa..179f97a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2018-07-31 Richard Earnshaw <rearnsha@arm.com> + * config/aarch64.md (unspecv): Add UNSPECV_SPECULAION_BARRIER. + (speculation_barrier): New insn. + +2018-07-31 Richard Earnshaw <rearnsha@arm.com> + * config/arm/unspecs.md (unspecv): Add VUNSPEC_SPECULATION_BARRIER. * config/arm/arm.md (speculation_barrier): New expand. (speculation_barrier_insn): New pattern. diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index e9c16f9..de52306 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -205,6 +205,7 @@ UNSPECV_SET_FPSR ; Represent assign of FPSR content. UNSPECV_BLOCKAGE ; Represent a blockage UNSPECV_PROBE_STACK_RANGE ; Represent stack range probing. + UNSPECV_SPECULATION_BARRIER ; Represent speculation barrier. ] ) @@ -6554,6 +6555,15 @@ (match_operand 1)) (clobber (reg:CC CC_REGNUM))])]) +;; Hard speculation barrier. +(define_insn "speculation_barrier" + [(unspec_volatile [(const_int 0)] UNSPECV_SPECULATION_BARRIER)] + "" + "isb\;dsb\\tsy" + [(set_attr "length" "8") + (set_attr "type" "block")] +) + ;; AdvSIMD Stuff (include "aarch64-simd.md") |