b6adc43f6e
Avoid generation of dead code in a few more situations.
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- Emit variable declarations as "simple", we want to avoid forcing the creation
of a dummy basic block, but still need to make the variable available for
later use.
- With that, we can now skip IRgen for other unreachable statements (which
don't define a label).
- Anders, I added two fixmes on calls to EmitVLASize, can you check them?
llvm-svn: 76361
2009-07-19 06:58:07 +00:00
a296c03430
Update for LLVM API change.
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llvm-svn: 76090
2009-07-16 18:09:38 +00:00
b909bf4937
Add IRGen support for return statements in functions with reference
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type.
llvm-svn: 72459
2009-05-27 04:56:12 +00:00
ec3cbfe8c6
Fixup codegen for volatile structs in the trivial cases (a a=a and a=a=a).
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llvm-svn: 72439
2009-05-26 22:03:21 +00:00
7d0479f2c2
Use v.data() instead of &v[0] when SmallVector v might be empty.
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llvm-svn: 72210
2009-05-21 09:52:38 +00:00
23d5a39195
"Fix" a problem with debug info in the presence of always_inline
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function calls. For a program like this:
#include <stdio.h>
static __inline__ __attribute__((always_inline))
int bar(int x) { return 4; }
int main() {
int X = bar(4);
printf("%d\n", X);
}
clang was not outputing any debug info for the body of main(). This is
because the backend is getting confused by the region_start/end that clang
is emitting for block scopes. For now, just disable these (matching llvm-gcc),
this stuff is in progress of rework anyway.
llvm-svn: 70889
2009-05-04 18:27:04 +00:00
d53e07b396
Remove unnecessary copy of constraint info.
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llvm-svn: 70835
2009-05-04 06:56:16 +00:00
33955dd28f
Remove unnecessary push_back (at least, I think it's unnecessary);
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hopefully, this fixes PR4144 without any regressions.
llvm-svn: 70823
2009-05-04 04:12:48 +00:00
61af27860d
look at the right operand when increasing the size of an asm output,
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this fixes http://llvm.org/bugs/show_bug.cgi?id=3373#c20
llvm-svn: 70685
2009-05-03 09:05:53 +00:00
99837deeaf
don't shadow 'i'
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llvm-svn: 70680
2009-05-03 08:38:58 +00:00
59c3a9cd54
add support for tying asm operands where the result is smaller than
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the input. This is part of PR3373.
llvm-svn: 70677
2009-05-03 08:21:20 +00:00
10f221f321
implement support for asm outputs targetting non-simple lvalue destinations
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like bitfields. incidentally llvm-gcc crashes on this sort of thing also. :)
llvm-svn: 70675
2009-05-03 07:53:25 +00:00
b65933eaa2
handle codegen of asms where a small input is tied to a large output.
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llvm-svn: 70672
2009-05-03 07:27:51 +00:00
17769a34da
refactor some code to get the input/output constraint info before
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processing the outputs, no functionality change.
llvm-svn: 70671
2009-05-03 07:05:00 +00:00
b4e463287e
Don't use indirect memory destinations for inline asm. Fixes 6841383.
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llvm-svn: 70523
2009-05-01 00:16:04 +00:00
c16d476b30
pull operands names "[foo]" into ConstraintInfo.
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llvm-svn: 70136
2009-04-26 17:57:12 +00:00
c3f4c7b1c5
pull the constraint string into the ConstraintInfo struct
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instead of passing it around in addition to it.
llvm-svn: 70135
2009-04-26 17:19:08 +00:00
d9725f7041
change TargetInfo::ConstraintInfo to be a struct that contains
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the enum along with some other data.
llvm-svn: 70114
2009-04-26 07:16:29 +00:00
c08711e840
Minor simplification.
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llvm-svn: 68992
2009-04-13 21:41:57 +00:00
f77e292a0f
Fix a subtle bug where the cleanup scope entries had a dangling block reference
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- <rdar://problem/6732143> Crash when generating @synchronize for
zero-cost exception
- Thanks to Anders for helping track down the problem.
llvm-svn: 68186
2009-04-01 04:37:47 +00:00
cda4d7e196
introduce a new -fheinous-gnu-extensions flag that enables really
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really horrible extensions that are disabled by default but that can
be accepted by -fheinous-gnu-extensions (but which always emit a
warning when enabled).
As our first instance of this, implement PR3788/PR3794, which allows
non-lvalues in inline asms in contexts where lvalues are required. bleh.
llvm-svn: 66910
2009-03-13 17:38:01 +00:00
d8c7ba278e
add plumbing to report diagnostics back through sema for malformed asmstrings.
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llvm-svn: 66598
2009-03-10 23:41:04 +00:00
35b5836147
move the asm string analysis code out of codegen into common
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code where Sema can get to it. No functionality change.
llvm-svn: 66596
2009-03-10 23:21:44 +00:00
f85a938985
Fix PR3682 by just disabling a broken assertion. This check should be
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done in sema, and is reflected by the existing PR3258. In the meantime,
fix PR3682 by disabling a bogus assertion (which doesn't account for +
operands).
llvm-svn: 66533
2009-03-10 06:42:37 +00:00
6dd0f9263d
reduce duplication of parsing code between %0 and %x0 and
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add support for modifiers on named references, like %c[foo].
llvm-svn: 66532
2009-03-10 06:38:02 +00:00
d7d5fdf090
move matching of named operands into AsmStmt class. At the same
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time handle + operands in operand counting, fixing asm.c:t7 to
expand into $2 instead of $1.
llvm-svn: 66531
2009-03-10 06:33:24 +00:00
80337892f4
reduce nesting, use memchr instead of explicit loop, eliminate a
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temporary std::string to fix a fixme.
llvm-svn: 66530
2009-03-10 06:11:34 +00:00
2d43eaefa2
Expand %= into ${:uid} so that the code generator emits a unique ID for the
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asm. This allows us to properly handle the case when an optimizer duplicates
the asm, such as here:
void bar() {
int i;
for (i = 0; i < 3; ++i)
asm("foo %=" : : "r"(0));
}
we now produce:
_bar:
xorl %eax, %eax
## InlineAsm Start
foo 0
## InlineAsm End
## InlineAsm Start
foo 1
## InlineAsm End
## InlineAsm Start
foo 2
## InlineAsm End
ret
instead of:
_bar:
xorl %eax, %eax
## InlineAsm Start
foo 1
## InlineAsm End
## InlineAsm Start
foo 1
## InlineAsm End
## InlineAsm Start
foo 1
## InlineAsm End
ret
This also fixes a fixme by eliminating a static.
llvm-svn: 66528
2009-03-10 05:39:21 +00:00
72bbf17340
add some helper methods to AsmStmt and add some comments.
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llvm-svn: 66521
2009-03-10 04:59:06 +00:00
57e673772e
slightly simplify some code, pull the 'is simple asm' case up in
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ConvertAsmString and shrink it a bit. No functionality change.
llvm-svn: 66520
2009-03-10 04:38:46 +00:00
ff9fbcaa8a
if we die in IR generation of a compound statement, include
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it in the stack trace, giving us stuff like:
Stack dump:
0. Program arguments: clang t.c -emit-llvm
1. <eof> parser at end of file
2. t.c:1:5: LLVM IR generation of declaration 'a'
3. t.c:1:9: LLVM IR generation of compound statement ('{}')
4. t.c:2:3: LLVM IR generation of compound statement ('{}')
Abort
llvm-svn: 66154
2009-03-05 08:04:57 +00:00
4192bce91b
add a special case for codegen that improves the case where we have
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multiple sequential cases to a) not create tons of fall-through basic blocks
and b) not recurse deeply. This fixes codegen on 100K deep cases, and improves
codegen on moderate cases from this:
switch i32 %tmp, label %sw.epilog [
i32 1000, label %sw.bb
i32 1001, label %sw.bb1
i32 1002, label %sw.bb2
i32 1003, label %sw.bb3
i32 1004, label %sw.bb4
...
sw.bb: ; preds = %entry
br label %sw.bb1
sw.bb1: ; preds = %entry, %sw.bb
br label %sw.bb2
sw.bb2: ; preds = %entry, %sw.bb1
br label %sw.bb3
sw.bb3: ; preds = %entry, %sw.bb2
br label %sw.bb4
to:
switch i32 %tmp, label %sw.epilog [
i32 1000, label %sw.bb
i32 1001, label %sw.bb
i32 1002, label %sw.bb
i32 1003, label %sw.bb
i32 1004, label %sw.bb
sw.bb: ;; many preds
llvm-svn: 66015
2009-03-04 04:46:18 +00:00
b3b675c35e
inline asm calls should be nounwind. Chris, please review.
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llvm-svn: 65866
2009-03-02 19:58:15 +00:00
e14282e274
Make sure to reset the DidCallStackSave variable before emitting a compound statement. Fixes PR3649.
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llvm-svn: 65291
2009-02-22 18:44:21 +00:00
63784f4e5e
Add CodeGen support for the nodebug attribute.
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llvm-svn: 64445
2009-02-13 08:11:52 +00:00
7ccf3e4e28
Handle the case where EmitBlock might be called multiple times for the same block. Fixes PR3536.
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llvm-svn: 64252
2009-02-10 22:50:24 +00:00
33c1b6528f
Remove the last remnants of the Obj-C EH stack code.
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llvm-svn: 64205
2009-02-10 06:07:49 +00:00
33747b6c41
Start removing the old Obj-C EH stack now that the cleanup stack is used instead.
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llvm-svn: 64203
2009-02-10 05:52:02 +00:00
1ac6282c5b
Replace a bunch of EmitBranch calls with EmitBranchThroughCleanup. No functionality change (yet).
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llvm-svn: 64159
2009-02-09 20:31:03 +00:00
ff0bb6ce62
Save and restore the DidCallStackSave variable
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llvm-svn: 64157
2009-02-09 20:23:40 +00:00
a6dbd7b25a
When we're at the stack depth we want, there isn't anything to do.
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llvm-svn: 64095
2009-02-08 22:00:53 +00:00
284d177c7f
Wire up break and continue processing to the new stack depth adjuster.
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If people could beat on it and let me know if there are any new
semantics required by newer language standards or DRs or any little
details I goofed on, I'd be happy to fix any issues found.
llvm-svn: 64079
2009-02-08 09:22:19 +00:00
fbfb5e6530
When emitting blocks, keep track of which cleanup scope they have. Minor fixes and cleanup.
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llvm-svn: 64053
2009-02-08 00:16:35 +00:00
be0f76a712
Add support for emitting cleanup blocks. Make EmitCompoundStatement emit cleanup blocks if necessary
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llvm-svn: 64051
2009-02-07 23:50:39 +00:00
0509d9635b
Ensure we track all the stack depths for all break and continue points
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correctly. This should lay the ground work to throw the big switch
and start code gening break and continue in the presense of vlas.
llvm-svn: 64046
2009-02-07 23:02:10 +00:00
56d2a15829
Format for 80-cols.
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llvm-svn: 64030
2009-02-07 20:14:12 +00:00
dc0d6be7b9
Arrange to have the correct StackDepth for while statements.
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llvm-svn: 64021
2009-02-07 18:08:12 +00:00
1f8be1b9ac
Fit into 80-col.
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llvm-svn: 64020
2009-02-07 17:18:33 +00:00
1d91dd98ad
Fixup goto codegen in and around VLAs.
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llvm-svn: 64014
2009-02-07 12:52:26 +00:00
570c357ded
If an input constraint refers to an output constraint, it should have the same constraint info as the output constraint. Fixes PR3417
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llvm-svn: 63127
2009-01-27 20:38:24 +00:00
Daniel Dunbar