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* Refactor common code of alignas.
Instead of working on attributes the function now works directly
on the type since the check always performed an extraction of
attributes from a type.
Bug 23393
* Attach _Alignas to the name.
Bug 23393
* Attach "aligned" attributes to names
So that __attribute((aligned(N))) remains consistent with _Alignas(N).
gcc and clang apply "aligned" attributes to names, with a special case
for typedefs:
typedef __attribute((aligned(16))) int int_al_16;
int_al_16 * p;
__attribute((aligned(16))) int * q;
For gcc, p is naturally-aligned pointer to 16-aligned int and
q is 16-aligned pointer to naturally-aligned int.
For CompCert with this commit, both p and q are 16-aligned pointers
to naturally-aligned int.
* Resurrect the alignment test involving typedef
The test was removed because it involved an _Alignas in a typedef,
which is no longer supported. However the same effect can be achieved
with an "aligned" attribute, which is still supported in typedef.
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The `_Alignas(expr)` construct is not C11, only `_Alignas(type)` is.
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This commits adds code generation for the RISC-V architecture, both in 32- and 64-bit modes.
The generated code was lightly tested using the simulator and cross-binutils from https://riscv.org/software-tools/
This port required the following additional changes:
- Integers: More properties about shrx
- SelectOp: now provides smart constructors for mulhs and mulhu
- SelectDiv, 32-bit integer division and modulus: implement constant propagation, use the new smart constructors mulhs and mulhu.
- Runtime library: if no asm implementation is provided, run the reference C implementation through CompCert. Since CompCert rejects the definitions of names of special functions such as __i64_shl, the reference implementation now uses "i64_" names, e.g. "i64_shl", and a renaming "i64_ -> __i64_" is performed over the generated assembly file, before assembling and building the runtime library.
- test/: add SIMU make variable to run tests through a simulator
- test/regression/alignas.c: make sure _Alignas and _Alignof are not #define'd by C headers
commit da14495c01cf4f66a928c2feff5c53f09bde837f
Author: Xavier Leroy <xavier.leroy@inria.fr>
Date: Thu Apr 13 17:36:10 2017 +0200
RISC-V port, continued
Now working on Asmgen.
commit 36f36eb3a5abfbb8805960443d087b6a83e86005
Author: Xavier Leroy <xavier.leroy@inria.fr>
Date: Wed Apr 12 17:26:39 2017 +0200
RISC-V port, first steps
This port is based on Prashanth Mundkur's experimental RV32 port and brings it up to date with CompCert, and adds 64-bit support (RV64). Work in progress.
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Use these constructor functions in C2C to rely less on the types produced
by the unverified elaborator.
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and to avoid wasting global variable space by inflating their sizeof needlessly.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2362 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
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