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| author | Iain Buclaw <ibuclaw@gdcproject.org> | 2023-07-02 03:24:53 +0200 |
|---|---|---|
| committer | Iain Buclaw <ibuclaw@gdcproject.org> | 2023-07-02 03:37:05 +0200 |
| commit | 80ae426a195a0d035640a6301da833564deade52 (patch) | |
| tree | 0aa16cb1bc0df8e8c80db61da2aa46373ff2b0d4 /gcc/gimple-loop-versioning.cc | |
| parent | 67e0967b32af60cdf5a0c3e811bfa63c30dcdb76 (diff) | |
| download | gcc-80ae426a195a0d035640a6301da833564deade52.zip gcc-80ae426a195a0d035640a6301da833564deade52.tar.gz gcc-80ae426a195a0d035640a6301da833564deade52.tar.bz2 | |
d: Fix core.volatile.volatileLoad discarded if result is unused
The first pass of code generation in the D front-end splits up all
compound expressions and discards expressions that have no side effects.
This included calls to the `volatileLoad' intrinsic if its result was
not used, causing such calls to be eliminated from the program.
We already set TREE_THIS_VOLATILE on the expression, however the
tree documentation says if this bit is set in an expression, so is
TREE_SIDE_EFFECTS. So set TREE_SIDE_EFFECTS on the expression too.
This prevents any early discarding from occuring.
PR d/110516
gcc/d/ChangeLog:
* intrinsics.cc (expand_volatile_load): Set TREE_SIDE_EFFECTS on the
expanded expression.
(expand_volatile_store): Likewise.
gcc/testsuite/ChangeLog:
* gdc.dg/torture/pr110516a.d: New test.
* gdc.dg/torture/pr110516b.d: New test.
Diffstat (limited to 'gcc/gimple-loop-versioning.cc')
0 files changed, 0 insertions, 0 deletions