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| author | Quentin Carbonneaux <[email protected]> | 2022-10-12 20:59:20 +0200 |
|---|---|---|
| committer | Quentin Carbonneaux <[email protected]> | 2022-10-12 21:12:08 +0200 |
| commit | 8ecae922997c55f70cd9e19cbf947a520f7ecca3 (patch) | |
| tree | f75685ee79cc015883b2a60d7a5cbf6c52c751d5 /test | |
| parent | 577e93fe6d729b63447faad471fd0f5f2296f667 (diff) | |
thread-local storage for amd64_apple
It is quite similar to arm64_apple.
Probably, the call that needs to be
generated also provides extra
invariants on top of the regular
abi, but I have not checked that.
Clang generates code that is a bit
neater than qbe's because, on x86,
a load can be fused in a call
instruction! We do not bother with
supporting these since we expect
only sporadic use of the feature.
For reference, here is what clang
might output for a store to the
second entry of a thread-local
array of ints:
movq _x@TLVP(%rip), %rdi
callq *(%rdi)
movl %ecx, 4(%rax)
Diffstat (limited to 'test')
| -rw-r--r-- | test/tls.ssa | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/tls.ssa b/test/tls.ssa new file mode 100644 index 0000000..e990663 --- /dev/null +++ b/test/tls.ssa @@ -0,0 +1,30 @@ +thread data $i = align 4 {w 42} +data $fmt = align 1 {b "i%d==%d\n", b 0} + +export +function w $main() { +@start + %pthr =l alloc8 8 + %rval =l alloc8 8 + call $pthread_create(l %pthr, l 0, l $thread, l 0) + %t =l load %pthr + call $pthread_join(l %t, l %rval) + %i0 =w loadw thread $i + call $printf(l $fmt, ..., w 0, w %i0) + %i1 =w load %rval + call $printf(l $fmt, ..., w 1, w %i1) + ret 0 +} + +function l $thread(l %arg) { +@start + %i3 =l add thread $i, 3 + storeb 24, %i3 + %ret =l loadsw thread $i + ret %ret +} + +# >>> output +# i0==42 +# i1==402653226 +# <<< |