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Fixed my rotten Engrish grammar. 

llvm-svn: 30144
This commit is contained in:
Bill Wendling 2006-09-07 08:36:28 +00:00
parent 4d7ce8a554
commit d0c0bc502e
1 changed files with 6 additions and 6 deletions
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12
llvm/docs/CodeGenerator.html
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@ -1168,9 +1168,9 @@ SelectionDAGs.</p>
<p>Live Intervals are the ranges (intervals) where a variable is <i>live</i>.
They are used by some <a href="#regalloc">register allocator</a> passes to
determine if two or more virtual registers which require the same register are
live at the same point in the program (conflict). When this situation occurs,
one virtual register must be <i>spilled</i>.</p>
determine if two or more virtual registers which require the same physical
register are live at the same point in the program (i.e., theyconflict). When
this situation occurs, one virtual register must be <i>spilled</i>.</p>
</div>
@ -1186,10 +1186,10 @@ calculate the set of registers that are immediately dead after the
instruction (i.e., the instruction calculates the value, but it is
never used) and the set of registers that are used by the instruction,
but are never used after the instruction (i.e., they are killed). Live
variable information is computed for each <i>virtual</i> and
variable information is computed for each <i>virtual</i> register and
<i>register allocatable</i> physical register in the function. This
is done in a very efficient manner because it uses SSA to sparsely
computer lifetime information for virtual registers (which are in SSA
compute lifetime information for virtual registers (which are in SSA
form) and only has to track physical registers within a block. Before
register allocation, LLVM can assume that physical registers are only
live within a single basic block. This allows it to do a single,
@ -1200,7 +1200,7 @@ a stack pointer or condition codes), it is not tracked.</p>
<p>Physical registers may be live in to or out of a function. Live in values
are typically arguments in registers. Live out values are typically return
values in registers. Live in values are marked as such, and are given a dummy
"defining" instruction during live interval analysis. If the last basic block
"defining" instruction during live intervals analysis. If the last basic block
of a function is a <tt>return</tt>, then it's marked as using all live out
values in the function.</p>