2004-02-25 19:28:19 +00:00
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2004-07-16 10:31:36 +00:00
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To-do
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-----
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2004-12-13 20:13:10 +00:00
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* Keep the address of the constant pool in a register instead of forming its
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address all of the time.
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* We can fold small constant offsets into the %hi/%lo references to constant
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pool addresses as well.
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First step towards V9 instructions in the V8 backend, two conditional move
patterns. This allows emission of this code:
t1:
save -96, %o6, %o6
subcc %i0, %i1, %l0
move %icc, %i0, %i2
or %g0, %i2, %i0
restore %g0, %g0, %g0
retl
nop
instead of this:
t1:
save -96, %o6, %o6
subcc %i0, %i1, %l0
be .LBBt1_2 !
nop
.LBBt1_1: !
or %g0, %i2, %i0
.LBBt1_2: !
restore %g0, %g0, %g0
retl
nop
for this:
int %t1(int %a, int %b, int %c) {
%tmp.2 = seteq int %a, %b
%tmp3 = select bool %tmp.2, int %a, int %c
ret int %tmp3
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25809 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-30 05:35:57 +00:00
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* When in V9 mode, register allocate %icc[0-3].
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2006-01-31 07:37:20 +00:00
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* Emit the 'Branch on Integer Register with Prediction' instructions. It's
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not clear how to write a pattern for this though:
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float %t1(int %a, int* %p) {
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%C = seteq int %a, 0
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br bool %C, label %T, label %F
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T:
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store int 123, int* %p
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br label %F
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F:
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ret float undef
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}
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codegens to this:
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t1:
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save -96, %o6, %o6
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1) subcc %i0, 0, %l0
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1) bne .LBBt1_2 ! F
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nop
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.LBBt1_1: ! T
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or %g0, 123, %l0
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st %l0, [%i1]
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.LBBt1_2: ! F
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restore %g0, %g0, %g0
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retl
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nop
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1) should be replaced with a brz in V9 mode.
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2004-07-16 10:31:36 +00:00
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2006-01-31 07:38:32 +00:00
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* Same as above, but emit conditional move on register zero (p192) in V9 mode.
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