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| author | Richard Earnshaw <rearnsha@arm.com> | 2018-07-31 17:35:41 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2018-07-31 17:35:41 +0000 |
| commit | bb8b0096829209874018c0997f340a43ca8b0461 (patch) | |
| tree | 79af8681cb57ea7e1bfb064447c4022c25ff121c | |
| parent | 425fc685dd59c07316a0c9112595331aa77ba112 (diff) | |
| download | gcc-bb8b0096829209874018c0997f340a43ca8b0461.zip gcc-bb8b0096829209874018c0997f340a43ca8b0461.tar.gz gcc-bb8b0096829209874018c0997f340a43ca8b0461.tar.bz2 | |
Arm - add speculation_barrier pattern
This patch defines a speculation barrier for AArch32.
* config/arm/unspecs.md (unspecv): Add VUNSPEC_SPECULATION_BARRIER.
* config/arm/arm.md (speculation_barrier): New expand.
(speculation_barrier_insn): New pattern.
From-SVN: r263169
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/arm/arm.md | 21 | ||||
| -rw-r--r-- | gcc/config/arm/unspecs.md | 1 |
3 files changed, 28 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index de37f1f..63971fa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 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. + +2018-07-31 Richard Earnshaw <rearnsha@arm.com> + * builtin-types.def (BT_FN_PTR_PTR_VAR): New function type. (BT_FN_I1_I1_VAR, BT_FN_I2_I2_VAR, BT_FN_I4_I4_VAR): Likewise. (BT_FN_I8_I8_VAR, BT_FN_I16_I16_VAR): Likewise. diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md index 361a026..ca2a2f5 100644 --- a/gcc/config/arm/arm.md +++ b/gcc/config/arm/arm.md @@ -12012,6 +12012,27 @@ [(set_attr "length" "4") (set_attr "type" "coproc")]) +(define_expand "speculation_barrier" + [(unspec_volatile [(const_int 0)] VUNSPEC_SPECULATION_BARRIER)] + "TARGET_EITHER" + " + /* Don't emit anything for Thumb1 and suppress the warning from the + generic expansion. */ + if (!TARGET_32BIT) + DONE; + " +) + +;; Generate a hard speculation barrier when we have not enabled speculation +;; tracking. +(define_insn "*speculation_barrier_insn" + [(unspec_volatile [(const_int 0)] VUNSPEC_SPECULATION_BARRIER)] + "TARGET_32BIT" + "isb\;dsb\\tsy" + [(set_attr "type" "block") + (set_attr "length" "8")] +) + ;; Vector bits common to IWMMXT and Neon (include "vec-common.md") ;; Load the Intel Wireless Multimedia Extension patterns diff --git a/gcc/config/arm/unspecs.md b/gcc/config/arm/unspecs.md index b05f85e..1941673 100644 --- a/gcc/config/arm/unspecs.md +++ b/gcc/config/arm/unspecs.md @@ -168,6 +168,7 @@ VUNSPEC_MCRR2 ; Represent the coprocessor mcrr2 instruction. VUNSPEC_MRRC ; Represent the coprocessor mrrc instruction. VUNSPEC_MRRC2 ; Represent the coprocessor mrrc2 instruction. + VUNSPEC_SPECULATION_BARRIER ; Represents an unconditional speculation barrier. ]) ;; Enumerators for NEON unspecs. |