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Rewrite the comments about the different versions of BuildMI, to
better emphasize their differences.
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file format. This format is being extracted from the source code and the
small recesses of Chris' brain.
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any case it's not portable.
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This testcase was reduced by John, thanks!
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java constants.
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fix the really bad code we're getting on PPC.
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a full 64-bit address, it must be adjusted to fit in the branch instruction's
immediate field. (This is only used in the reoptimizer, for now.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13608 91177308-0d34-0410-b5e6-96231b3b80d8
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Fix a typo in a debug message.
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definition in a namespace of a non-declared function.
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effects as) CloneFunctionInto().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13601 91177308-0d34-0410-b5e6-96231b3b80d8
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CloneTrace, and because it is primarily an operation on ValueMaps. It
is now a global (non-static) function which can be pulled in using
ValueMapper.h.
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* Removed redundant function comments
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correct error message.
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Add better comments, including a better head-of-file comment.
Prune #includes.
Fix a FIXME that Chris put here by using doInitialization().
Use DEBUG() to print out debug msgs.
Give names to basic blocks inserted by this pass.
Expand tabs.
Use InsertProfilingInitCall() from ProfilingUtils to insert the initialize call.
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MachineBasicBlocks instead.
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Get rid of separate numbering for LLVM BasicBlocks; use the automatically
generated MachineBasicBlock numbering.
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LLVM BasicBlock operands.
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in the size calculation.
This is not something you want to see:
Loop Unroll: F[main] Loop %no_exit Loop Size = 2 Trip Count = 2147483648 - UNROLLING!
The problem was that 2*2147483648 == 0.
Now we get:
Loop Unroll: F[main] Loop %no_exit Loop Size = 2 Trip Count = 2147483648 - TOO LARGE: 4294967296>100
Thanks to some anonymous person playing with the demo page that repeatedly
caused zion to go into swapping land. That's one way to ensure you'll get
a quick bugfix. :)
Testcase here: Transforms/LoopUnroll/2004-05-13-DontUnrollTooMuch.ll
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times. :(
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and passing a null pointer into a function.
For this testcase:
void %test(int** %X) {
store int* null, int** %X
call void %test(int** null)
ret void
}
we now generate this:
test:
sub %ESP, 12
mov %EAX, DWORD PTR [%ESP + 16]
mov DWORD PTR [%EAX], 0
mov DWORD PTR [%ESP], 0
call test
add %ESP, 12
ret
instead of this:
test:
sub %ESP, 12
mov %EAX, DWORD PTR [%ESP + 16]
mov %ECX, 0
mov DWORD PTR [%EAX], %ECX
mov %EAX, 0
mov DWORD PTR [%ESP], %EAX
call test
add %ESP, 12
ret
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the alloca address into common operations like loads/stores.
In a simple testcase like this (which is just designed to excersize the
alloca A, nothing more):
int %test(int %X, bool %C) {
%A = alloca int
store int %X, int* %A
store int* %A, int** %G
br bool %C, label %T, label %F
T:
call int %test(int 1, bool false)
%V = load int* %A
ret int %V
F:
call int %test(int 123, bool true)
%V2 = load int* %A
ret int %V2
}
We now generate:
test:
sub %ESP, 12
mov %EAX, DWORD PTR [%ESP + 16]
mov %CL, BYTE PTR [%ESP + 20]
*** mov DWORD PTR [%ESP + 8], %EAX
mov %EAX, OFFSET G
lea %EDX, DWORD PTR [%ESP + 8]
mov DWORD PTR [%EAX], %EDX
test %CL, %CL
je .LBB2 # PC rel: F
.LBB1: # T
mov DWORD PTR [%ESP], 1
mov DWORD PTR [%ESP + 4], 0
call test
*** mov %EAX, DWORD PTR [%ESP + 8]
add %ESP, 12
ret
.LBB2: # F
mov DWORD PTR [%ESP], 123
mov DWORD PTR [%ESP + 4], 1
call test
*** mov %EAX, DWORD PTR [%ESP + 8]
add %ESP, 12
ret
Instead of:
test:
sub %ESP, 20
mov %EAX, DWORD PTR [%ESP + 24]
mov %CL, BYTE PTR [%ESP + 28]
*** lea %EDX, DWORD PTR [%ESP + 16]
*** mov DWORD PTR [%EDX], %EAX
mov %EAX, OFFSET G
mov DWORD PTR [%EAX], %EDX
test %CL, %CL
*** mov DWORD PTR [%ESP + 12], %EDX
je .LBB2 # PC rel: F
.LBB1: # T
mov DWORD PTR [%ESP], 1
mov %EAX, 0
mov DWORD PTR [%ESP + 4], %EAX
call test
*** mov %EAX, DWORD PTR [%ESP + 12]
*** mov %EAX, DWORD PTR [%EAX]
add %ESP, 20
ret
.LBB2: # F
mov DWORD PTR [%ESP], 123
mov %EAX, 1
mov DWORD PTR [%ESP + 4], %EAX
call test
*** mov %EAX, DWORD PTR [%ESP + 12]
*** mov %EAX, DWORD PTR [%EAX]
add %ESP, 20
ret
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sized allocas in the entry block). Instead of generating code like this:
entry:
reg1024 = ESP+1234
... (much later)
*reg1024 = 17
Generate code that looks like this:
entry:
(no code generated)
... (much later)
t = ESP+1234
*t = 17
The advantage being that we DRAMATICALLY reduce the register pressure for these
silly temporaries (they were all being spilled to the stack, resulting in very
silly code). This is actually a manual implementation of rematerialization :)
I have a patch to fold the alloca address computation into loads & stores, which
will make this much better still, but just getting this right took way too much time
and I'm sleepy.
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adjust it much easier. Also changed border to gray to fit into the current
color scheme.
* Convert < and > to < and >, respectively.
* Wrap long lines at 80 cols
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