llvm/test/CodeGen/Generic, branch release_22http://llvm.orghttps://git.amat.us/llvm/atom/test/CodeGen/Generic?h=release_222008-01-15T22:17:26Znew testcase for llvm.trap.2008-01-15T22:17:26ZChris Lattnersabre@nondot.org2008-01-15T22:17:26Zurn:sha1:9a856b049d767e9da43736e9f05c7a7c772fb404
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46020 91177308-0d34-0410-b5e6-96231b3b80d8
new testcase for PR18452008-01-10T00:30:38ZChris Lattnersabre@nondot.org2008-01-10T00:30:38Zurn:sha1:314286f6bd7e7d1c4833866831aa576583c2d7b3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45795 91177308-0d34-0410-b5e6-96231b3b80d8
Setting GlobalDirective in TargetAsmInfo by default rather than2008-01-07T02:31:11ZGordon Henriksengordonhenriksen@mac.com2008-01-07T02:31:11Zurn:sha1:572742e876478d3ec7ff0750c0473d7621804b15
providing a misleading facility. It's used once in the MIPS backend
and hardcoded as "\t.globl\t" everywhere else.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45676 91177308-0d34-0410-b5e6-96231b3b80d8
With this patch, the LowerGC transformation becomes the2008-01-07T01:30:53ZGordon Henriksengordonhenriksen@mac.com2008-01-07T01:30:53Zurn:sha1:8fa89291774a29ee30adb9d0fd01655c84eaac13
ShadowStackCollector, which additionally has reduced overhead with
no sacrifice in portability.
Considering a function @fun with 8 loop-local roots,
ShadowStackCollector introduces the following overhead
(x86):
; shadowstack prologue
movl L_llvm_gc_root_chain$non_lazy_ptr, %eax
movl (%eax), %ecx
movl $___gc_fun, 20(%esp)
movl $0, 24(%esp)
movl $0, 28(%esp)
movl $0, 32(%esp)
movl $0, 36(%esp)
movl $0, 40(%esp)
movl $0, 44(%esp)
movl $0, 48(%esp)
movl $0, 52(%esp)
movl %ecx, 16(%esp)
leal 16(%esp), %ecx
movl %ecx, (%eax)
; shadowstack loop overhead
(none)
; shadowstack epilogue
movl 48(%esp), %edx
movl %edx, (%ecx)
; shadowstack metadata
.align 3
___gc_fun: # __gc_fun
.long 8
.space 4
In comparison to LowerGC:
; lowergc prologue
movl L_llvm_gc_root_chain$non_lazy_ptr, %eax
movl (%eax), %ecx
movl %ecx, 48(%esp)
movl $8, 52(%esp)
movl $0, 60(%esp)
movl $0, 56(%esp)
movl $0, 68(%esp)
movl $0, 64(%esp)
movl $0, 76(%esp)
movl $0, 72(%esp)
movl $0, 84(%esp)
movl $0, 80(%esp)
movl $0, 92(%esp)
movl $0, 88(%esp)
movl $0, 100(%esp)
movl $0, 96(%esp)
movl $0, 108(%esp)
movl $0, 104(%esp)
movl $0, 116(%esp)
movl $0, 112(%esp)
; lowergc loop overhead
leal 44(%esp), %eax
movl %eax, 56(%esp)
leal 40(%esp), %eax
movl %eax, 64(%esp)
leal 36(%esp), %eax
movl %eax, 72(%esp)
leal 32(%esp), %eax
movl %eax, 80(%esp)
leal 28(%esp), %eax
movl %eax, 88(%esp)
leal 24(%esp), %eax
movl %eax, 96(%esp)
leal 20(%esp), %eax
movl %eax, 104(%esp)
leal 16(%esp), %eax
movl %eax, 112(%esp)
; lowergc epilogue
movl 48(%esp), %edx
movl %edx, (%ecx)
; lowergc metadata
(none)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45670 91177308-0d34-0410-b5e6-96231b3b80d8
Fix PR1833 - eh.exception and eh.selector return two2007-12-31T18:35:50ZDuncan Sandsbaldrick@free.fr2007-12-31T18:35:50Zurn:sha1:b027fa001f16660a231a54ecea6a79f5c7855d7c
values, which means doing extra legalization work.
It would be easier to get this kind of thing right if
there was some documentation...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45472 91177308-0d34-0410-b5e6-96231b3b80d8
Tests for changes made in r45356, where IPO optimizations would drop2007-12-26T02:47:37ZGordon Henriksengordonhenriksen@mac.com2007-12-26T02:47:37Zurn:sha1:e86ce7d94abaf7883a5d84dcb9a79c118b63672b
collector algorithms.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45357 91177308-0d34-0410-b5e6-96231b3b80d8
GC poses hazards to the inliner. Consider:2007-12-25T03:10:07ZGordon Henriksengordonhenriksen@mac.com2007-12-25T03:10:07Zurn:sha1:0e13821c96937830ec817f08095c3cef1fdcac8d
define void @f() {
...
call i32 @g()
...
}
define void @g() {
...
}
The hazards are:
- @f and @g have GC, but they differ GC. Inlining is invalid. This
may never occur.
- @f has no GC, but @g does. g's GC must be propagated to @f.
The other scenarios are safe:
- @f and @g have the same GC.
- @f and @g have no GC.
- @g has no GC.
This patch adds inliner checks for the former two scenarios.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45351 91177308-0d34-0410-b5e6-96231b3b80d8
Noting and enforcing that GC intrinsics are valid only within a2007-12-25T02:31:26ZGordon Henriksengordonhenriksen@mac.com2007-12-25T02:31:26Zurn:sha1:e1433f24cf714c49b266e8cefdbbb8a464ffcb8e
function with GC.
This will catch the error when the inliner inlines a function with
GC into a caller with no GC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45350 91177308-0d34-0410-b5e6-96231b3b80d8
Adjusting verification of "llvm.gc*" intrinsic prototypes to match2007-12-25T02:02:10ZGordon Henriksengordonhenriksen@mac.com2007-12-25T02:02:10Zurn:sha1:27acd3a999ec3790e6af1d6416295caab5033320
LangRef.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45349 91177308-0d34-0410-b5e6-96231b3b80d8
Make invokes of inline asm legal. Teach codegen2007-12-17T18:08:19ZDuncan Sandsbaldrick@free.fr2007-12-17T18:08:19Zurn:sha1:fd7b326bea39c077eea8d378156bcf09051cc4ec
how to lower them (with no attempt made to be
efficient, since they should only occur for
unoptimized code).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45108 91177308-0d34-0410-b5e6-96231b3b80d8