llvm-svn: 50649

highlight the most nested subexpression that appears most responsible (giving
the user better diagnostic feedback).

Updated test cases to illustrate this feature.

Implements: <rdar://problem/5880443>
llvm-svn: 50647

llvm-svn: 50639

related to pp-expressions.  Doing so is pretty simple and this
patch implements it, yielding nice diagnostics like:

t.c:2:7: error: division by zero in preprocessor expression
#if 1 / (0 + 0)
    ~ ^ ~~~~~~~
t.c:5:14: error: expected ')' in preprocessor expression
#if (412 + 42
     ~~~~~~~~^
t.c:5:5: error: to match this '('
#if (412 + 42
    ^
t.c:10:10: warning: left side of operator converted from negative value to unsigned: -42 to 18446744073709551574
#if (-42 + 0U) / -2
     ~~~ ^ ~~
t.c:10:16: warning: right side of operator converted from negative value to unsigned: -2 to 18446744073709551614
#if (-42 + 0U) / -2
    ~~~~~~~~~~ ^ ~~
5 diagnostics generated.

llvm-svn: 50638

the final part of PR2279

llvm-svn: 50635

the code being generated does not require an executable stack.

Also, add target-specific code to make use of this on Linux
on x86. 

llvm-svn: 50634

pedantic error.  Perhaps I should add a class of 'extension' that is
'extension that warns by default', which would be cleaner.

llvm-svn: 50633

llvm-svn: 50632

llvm-svn: 50631

but should work. Work is in progress, more models will follow

llvm-svn: 50630

Patch by Florian Brandner.

llvm-svn: 50628

a) correct rejection of ',' in pp expressions.
b) the precedence of ',' was wrong w.r.t. ?:.

Thanks again to Neil for finding these and providing testcases.

llvm-svn: 50625

for pointing this out.

llvm-svn: 50624

llvm-svn: 50623

llvm-svn: 50622

llvm-svn: 50621

llvm-svn: 50620

Select vector shift with non-immediate i32 shift amount operand by first moving the operand into the right register.

llvm-svn: 50619

using dyn_cast<> on already freed memory.

llvm-svn: 50618

llvm-svn: 50617

llvm-svn: 50616

llvm-svn: 50615

llvm-svn: 50614

Fix 'swapping' of attributes to not insert null values into the 
DeclAttrs map.

llvm-svn: 50612

type should be internal, not weak/linkonce.

llvm-svn: 50611

llvm-svn: 50610

llvm-svn: 50609

llvm-svn: 50608

llvm-svn: 50607

llvm-svn: 50604

llvm-svn: 50603

Add separate intrinsics for MMX / SSE shifts with i32 integer operands. This allow us to simplify the horribly complicated matching code.

llvm-svn: 50601

llvm-svn: 50600

llvm-svn: 50598

llvm-svn: 50597

llvm-svn: 50596

llvm-svn: 50594

llvm-svn: 50593

prefix for all files.

llvm-svn: 50592

llvm-svn: 50591