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Commit Graph

15 Commits

Author SHA1 Message Date
Devang Patel
8d170194e8 Add new function attribute - noimplicitfloat
Update code generator to use this attribute and remove NoImplicitFloat target option.
Update llc to set this attribute when -no-implicit-float command line option is used.

llvm-svn: 72959
2009-06-05 21:57:13 +00:00
Devang Patel
9757e4f9f3 Add new function attribute - noredzone.
Update code generator to use this attribute and remove DisableRedZone target option.
Update llc to set this attribute when -disable-red-zone command line option is used.

llvm-svn: 72894
2009-06-04 22:05:33 +00:00
Jay Foad
16d48d2595 Use v.data() instead of &v[0] when SmallVector v might be empty.
llvm-svn: 72210
2009-05-21 09:52:38 +00:00
Nick Lewycky
4d1c04a4ea Use the spiffy new getAlignmentFromAttrs function.
llvm-svn: 62039
2009-01-11 17:02:06 +00:00
Nick Lewycky
b8719a653f Commit missed files from nocapture change.
llvm-svn: 61240
2008-12-19 09:38:31 +00:00
Bill Wendling
f807a68f2e Temporarily revert r61019, r61030, and r61040. These were breaking LLVM Release
builds.

llvm-svn: 61094
2008-12-16 19:06:48 +00:00
Nick Lewycky
504288e7af It turns out that "align 1" and unaligned are different. Add a bias to the
alignment attribute such that 0 means unaligned.

This will probably require a rebuild of llvm-gcc because of the change to
Attributes.h. If you see many test failures on "make check", please rebuild
your llvm-gcc.

llvm-svn: 61030
2008-12-15 07:29:55 +00:00
Nick Lewycky
8bdae4db80 Introducing nocapture, a parameter attribute for pointers to indicate that the
callee will not introduce any new aliases of that pointer.

The attributes had all bits allocated already, so I decided to collapse
alignment. Alignment was previously stored as a 16-bit integer from bits 16 to
32 of the attribute, but it was required to be a power of 2. Now it's stored in
log2 encoded form in five bits from 16 to 21. That gives us 11 more bits of
space.

You may have already noticed that you only need four bits to encode a 16-bit
power of two, so why five bits? Because the AsmParser accepted 32-bit
alignments, even though we couldn't store them (they were silently discarded).
Now we can store them in memory, but not in the bitcode.

The bitcode format was already storing these as 64-bit VBR integers. So, the
bitcode format stays the same, keeping the alignment values stored as 16 bit
raw values. There's some hideous code in the reader and writer that deals with
this, waiting to be ripped out the moment we run out of bits again and have to
replace the parameter attributes table encoding.

llvm-svn: 61019
2008-12-15 01:34:58 +00:00
Bill Wendling
f5b264a64b Implement stack protectors as function attributes: "ssp" and "sspreq".
llvm-svn: 59202
2008-11-13 01:02:14 +00:00
Devang Patel
e4e6ea0728 Now Attributes are divided in three groups
- return attributes - inreg, zext and sext
- parameter attributes
- function attributes - nounwind, readonly, readnone, noreturn

Return attributes use 0 as the index.
Function attributes use ~0U as the index.

This patch requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56704
2008-09-26 22:53:05 +00:00
Devang Patel
64dd7a2e89 Large mechanical patch.
s/ParamAttr/Attribute/g
s/PAList/AttrList/g
s/FnAttributeWithIndex/AttributeWithIndex/g
s/FnAttr/Attribute/g

This sets the stage 
- to implement function notes as function attributes and 
- to distinguish between function attributes and return value attributes.

This requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56622
2008-09-25 21:00:45 +00:00
Devang Patel
f0bda74eca s/ParamAttrsWithIndex/FnAttributeWithIndex/g
llvm-svn: 56535
2008-09-24 00:55:02 +00:00
Devang Patel
64a2547c42 s/ParamAttributeListImpl/AttributeListImpl/g
llvm-svn: 56532
2008-09-24 00:29:49 +00:00
Devang Patel
1b09ba231f 80 cols
llvm-svn: 56521
2008-09-23 23:32:15 +00:00
Devang Patel
a3e9bf1bca s/ParameterAttributes/Attributes/g
llvm-svn: 56513
2008-09-23 23:03:40 +00:00