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https://github.com/c64scene-ar/llvm-6502.git
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4dd4a2d278
it in the block. This codegens:
int %test(bool %c) {
%retval = select bool %c, int 17, int 1
ret int %retval
}
as:
_test:
rlwinm r2, r3, 0, 31, 31
li r2, 17
cmpwi cr0, r3, 0
bne .LBB_test_2 ;
.LBB_test_1: ;
li r2, 1
.LBB_test_2: ;
or r3, r2, r2
blr
instead of:
_test:
rlwinm r2, r3, 0, 31, 31
li r2, 17
li r4, 1
cmpwi cr0, r3, 0
bne .LBB_test_2 ;
.LBB_test_1: ;
or r2, r4, r4
.LBB_test_2: ;
or r3, r2, r2
blr
... which is one fewer instruction. The savings are more significant for
global address and constantfp nodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22946 91177308-0d34-0410-b5e6-96231b3b80d8
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|---|---|---|
| .. | ||
| Alpha | ||
| CBackend | ||
| IA64 | ||
| PowerPC | ||
| Skeleton | ||
| Sparc | ||
| SparcV8 | ||
| SparcV9 | ||
| X86 | ||
| Makefile | ||
| MRegisterInfo.cpp | ||
| Target.td | ||
| TargetData.cpp | ||
| TargetFrameInfo.cpp | ||
| TargetInstrInfo.cpp | ||
| TargetMachine.cpp | ||
| TargetMachineRegistry.cpp | ||
| TargetSchedInfo.cpp | ||
| TargetSubtarget.cpp | ||