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* tests: don't assume $(CC) is gccAvi Halachmi (:avih)2016-12-241-2/+2
| | | | This also allows self hosting + testing when $(CC) is tcc.
* tests: OOT build fixes etc.grischka2016-12-204-11/+26
| | | | | | | | | | | | | | | | | | | | | | tests/Makefile: fix out-of-tree build issues Also: - win64: align(16) MEM_DEBUG user memory on win64 the struct jmp_buf in the TCCState structure which we allocate by tcc_malloc needs alignment 16 because the msvcrt setjmp uses MMX instructions. - libtcc_test.c: win32/64 need __attribute__((dllimport)) for extern data objects - tcctest.c: exclude stuff that gcc does not compile except for relocation_test() the other issues are mostly ASM related. We should probably check GCC versions but I have no idea which mingw/gcc versions support what and which don't. - lib/Makefile: use tcc to compile libtcc1.a (except on arm which needs arm-asm
* Fix some code suppression falloutMichael Matz2016-12-206-1/+106
| | | | | | | | | | Some more subtle issues with code suppression: - outputting asms but not their operand setup is broken - but global asms must always be output - statement expressions are transparent to code suppression - vtop can't be transformed from VT_CMP/VT_JMP when nocode_wanted Also remove .exe files from tests2 if they don't fail.
* tests: add memory leak testgrischka2016-12-183-3/+16
| | | | | | | | | | | | | Also ... tcctest.c: - exclude stuff that gcc doesn't compile on windows. libtcc.c/tccpp.c: - use unsigned for memory sizes to avoid printf format warnings - use "file:line: message" to make IDE error parsers happy. tccgen.c: fix typo
* Fix gawk miscompileMichael Matz2016-12-182-2/+15
| | | | | See testcase. Function pointer use was hosed when the destination function wasn't also called normally by the program.
* i386: Fix various testsuite issuesMichael Matz2016-12-151-2/+22
| | | | | | | | | on 32bit long long support was sometimes broken. This fixes code-gen for long long values in switches, disables a x86-64 specific testcase and avoid an undefined shift amount. It comments out a bitfield test involving long long bitfields > 32 bit; with GCC layout they can straddle multiple words and code generation isn't prepared for this.
* struct-layout: Allow lowering of member alignmentMichael Matz2016-12-151-0/+16
| | | | | | when an alignment is explicitely given on the member itself, or on its types attributes then respect it always. Was only allowed to increase before, but GCC is allowing it.
* Support large alignment requestsMichael Matz2016-12-151-0/+7
| | | | | | | | The linux kernel has some structures that are page aligned, i.e. 4096. Instead of enlarging the bit fields to specify this, use the fact that alignment is always power of two, and store only the log2 minus 1 of it. The 5 bits are enough to specify an alignment of 1 << 30.
* Fix struct layout some moreMichael Matz2016-12-151-0/+86
| | | | | | Anonymous sub-sub-members weren't handled correctly. Bit-fields neither: this implements PCC layout for now. It temporarily disables MS-compatible bit-field layout.
* Split off record layoutingMichael Matz2016-12-151-4/+0
| | | | | | | | | | | Such struct decl: struct S { char a; int i;} __attribute__((packed)); should be accepted and cause S to be five bytes long (i.e. the packed attribute should matter). So we can't layout the members during parsing already. Split off the offset and alignment calculation for this.
* Fix 64bit enums and switch casesMichael Matz2016-12-151-0/+117
| | | | | | | See testcases. We now support 64bit case constants. At the same time also 64bit enum constants on L64 platforms (otherwise the Sym struct isn't large enough for now). The testcase also checks for various cases where sign/zero extension was confused.
* tccpp: Fix token pastingMichael Matz2016-12-152-0/+20
| | | | | | | | | See testcase. We must always paste tokens (at least if not currently substing a normal argument, which is a speed optimization only now) but at the same time must not regard a ## token coming from argument expansion as the token-paste operator, nor if we constructed a ## token due to pasting itself (that was already checked by pp/01.c).
* Fix miscompile with dead switchesMichael Matz2016-12-151-0/+51
| | | | | | | | In certain very specific situations (involving switches with asms inside dead statement expressions) we could generate invalid code (clobbering the buffer so much that we generated invalid instructions). Don't emit the decision table if the switch itself is dead.
* 64bit: Fix addends > 32 bitsMichael Matz2016-12-151-0/+16
| | | | | | If a symbolic reference is offsetted by a constant > 32bit the backends can't deal with that, so don't construct such values.
* x86-64-asm: Accept high register in clobbersMichael Matz2016-12-151-0/+24
| | | | | | | The callee saved registers (among them r12-r15) really need saving/restoring if mentioned in asm clobbers, even if TCC itself doesn't use them. E.g. the linux kernel relies on that in its switch_to() implementation.
* Fix initializing members multiple timesMichael Matz2016-12-152-0/+23
| | | | | | | When intializing members where the initializer needs relocations and the member is initialized multiple times we can't allow that to lead to multiple relocations to the same place. The last one must win.
* Support local register variablesMichael Matz2016-12-151-0/+3
| | | | | | | | | Similar to GCC a local asm register variable enforces the use of a specified register in asm operands (and doesn't otherwise matter). Works only if the variable is directly mentioned as operand. For that we now generally store a backpointer from an SValue to a Sym when the SValue was the result of unary() parsing a symbol identifier.
* Fix const folding of 64bit pointer constantsMichael Matz2016-12-151-0/+6
| | | | See testcase.
* x86-asm: Correct register size for pointer opsMichael Matz2016-12-151-0/+8
| | | | | A pointer is 64 bit as well, so it needs a full register for register operands.
* struct-init: Copy relocs for compound literalsMichael Matz2016-12-151-0/+29
| | | | | When copying the content of compound literals we must include relocations as well.
* x86_64-asm: fix copy-out registersMichael Matz2016-12-151-1/+9
| | | | | | If the destination is an indirect pointer access (which ends up as VT_LLOCAL) the intermediate pointer must be loaded as VT_PTR, not as whatever the pointed to type is.
* opt: Don't emit inline functions from dead codeMichael Matz2016-12-151-0/+8
| | | | | Inside dead code don't regard inline functions as being referenced.
* Handle __builtin_extract_return_addrMichael Matz2016-12-151-0/+2
| | | | | Our architectures don't need anything special for this builtin, just pass through the argument.
* opt: constprop also 'cond && 0'Michael Matz2016-12-151-0/+39
| | | | | | We didn't handle constants in logical expressions when they weren't the first operand. Some reordering in the loop structure is enough to handle them.
* opt: Make break and goto not fallthroughMichael Matz2016-12-151-0/+51
| | | | | As we can optimize dead code a bit already it's fitting to disable code emission after break and goto.
* opt: Start optimizing dead code a bitMichael Matz2016-12-153-0/+167
| | | | | | | If a condition is always zero/non-zero we can omit the then or else code. This is complicated a bit by having to deal with labels that might make such code reachable without us yet knowing during parsing.
* Fix more nocode_wanted jump problemsMichael Matz2016-12-152-0/+36
| | | | | | | In statement expression we really mustn't emit backward jumps under nocode_wanted (they will form infinte loops as no expressions are evaluated). Do-while and explicit loop with gotos weren't handled.
* Fix aliases on 64 bitMichael Matz2016-12-151-0/+1
| | | | Use correct width ELF structure.
* Fix sizeof(char[a])Michael Matz2016-12-151-0/+10
| | | | | The sizes of VLAs need to be evaluated even inside sizeof, i.e. when nocode_wanted is set.
* Fix __builtin_constant_p(1000/x)Michael Matz2016-12-151-0/+10
| | | | | was incorrectly treated as constant because the vpop removed all traces of non-constness.
* tccasm: Support refs to anon symbols from asmMichael Matz2016-12-151-0/+23
| | | | | | | This happens when e.g. string constants (or other static data) are passed as operands to inline asm as immediates. The produced symbol ref wouldn't be found. So tighten the connection between C and asm-local symbol table even more.
* tccasm: Don't ignore # in preprocessor directivesMichael Matz2016-12-151-4/+17
| | | | | | | Our preprocessor throws away # line-comments in asm mode. It did so also inside preprocessor directives, thereby removing stringification. Parse defines in non-asm mode (but retain '.' as identifier character inside macro definitions).
* x86-asm: Accept all 32bit immediatesMichael Matz2016-12-151-0/+2
| | | | | In particular don't care if they're signed or unsigned, they're all acceptable as immediates.
* Fix enum bitfields passed to stdarg functionsMichael Matz2016-12-151-0/+5
| | | | | VT_ENUM types use the .ref member and can be VT_BITFIELD, so we need to copy it as well. Simply do it always.
* Addresses of non-weak symbols are non-zeroMichael Matz2016-12-151-0/+10
| | | | Use this fact in some foldings of comparisons. See testcase.
* Fix access-after-free with statement expressionsMichael Matz2016-12-151-0/+46
| | | | | | | | | | | | The return value of statement expressions might refer to local symbols, so those can't be popped. The old error message always was just a band-aid, and since disabling it for pointer types it wasn't effective anyway. It also never considered that also the vtop->sym member might have referred to such symbols (see the testcase with the local static, that used to segfault). For fixing this (can be seen better with valgrind and SYM_DEBUG) simply leave local symbols of stmt exprs on the stack.
* tccpp: Allow computed include like 42.hMichael Matz2016-12-152-3/+31
| | | | | | The include directive needs to be parsed as pp-tokens, not as token (i.e. no conversion to TOK_STR or TOK_NUM). Also fix parsing computed includes using quoted strings.
* x86-asm: Correctly infer register size for boolsMichael Matz2016-12-151-0/+10
| | | | | | Register operands of type _Bool weren't correctly getting the 8-bit sized registers (but rather used the default 32-bit ones).
* x86-64-asm: Implement cmpxchg16bMichael Matz2016-12-151-0/+3
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* x86-64: Allow loads from some structs/unionsMichael Matz2016-12-151-0/+6
| | | | | | GCC allows register loads for asms based on type mode, and correctly sized structs/union have an allowed mode (basically 1,2,4,8 sized aggregates).
* tccasm: Lookup C symbols from ASM blocksMichael Matz2016-12-151-0/+28
| | | | | It's now possible to use symbols defined in C code to be used from later inline asm blocks. See testcase.
* tccasm: Implement .set sym, exprMichael Matz2016-12-151-0/+11
| | | | | | | | | | That, as well as "sym = expr", if expr contains symbols. Slightly tricky because a definition from .set is overridable, whereas proper definitions aren't. This doesn't yet allow using this for override tricks from C and global asm blocks because the symbol tables from C and asm are separate.
* enums and ints are compatibleMichael Matz2016-12-151-1/+1
| | | | | | | But like GCC do warn about changes in signedness. The latter leads to some changes in gen_assign_cast to not also warn about unsigned* = int* (where GCC warns, but only with extra warnings).
* enums and ints are compatibleMichael Matz2016-12-151-0/+2
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* x86-64-asm: Fix ltr/str and push/pop operandsMichael Matz2016-12-151-0/+5
| | | | | str accepts rm16/r32/r64, and push/pop defaults to 64 when given memory operands (to 32 on i386).
* x86-64-asm: Implement high %cr registersMichael Matz2016-12-151-0/+2
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* struct-init: Support range inits for local varsMichael Matz2016-12-152-0/+5
| | | | Implement missing support for range init for local variables.
* x86-64-asm: Support high registers %r8 - %r15Michael Matz2016-12-151-3/+37
| | | | | | | This requires correctly handling the REX prefix. As bonus we now also support the four 8bit registers spl,bpl,sil,dil, which are decoded as ah,ch,dh,bh in non-long-mode (and require a REX prefix as well).
* inline-asm: Accept "flags" clobberMichael Matz2016-12-151-1/+1
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* struct-init: Allow member initialization from qualified lvaluesMichael Matz2016-12-152-3/+29
| | | | See testcase.