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[mips] Set flag isAsCheapAsAMove flag on instruction LUi.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167345 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2012-11-03 00:26:02 +00:00
parent efcc1aec64
commit 3c9c1ab7b7
2 changed files with 26 additions and 1 deletions
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2
lib/Target/Mips/MipsInstrInfo.td
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@ -421,7 +421,7 @@ class shift_rotate_reg<bits<6> func, bits<5> isRotate, string instr_asm,
// Load Upper Imediate
class LoadUpper<bits<6> op, string instr_asm, RegisterClass RC, Operand Imm>:
FI<op, (outs RC:$rt), (ins Imm:$imm16),
!strconcat(instr_asm, "\t$rt, $imm16"), [], IIAlu> {
!strconcat(instr_asm, "\t$rt, $imm16"), [], IIAlu>, IsAsCheapAsAMove {
let rs = 0;
let neverHasSideEffects = 1;
let isReMaterializable = 1;

25
test/CodeGen/Mips/remat-immed-load.ll
View File

@ -24,3 +24,28 @@ entry:
}
declare void @foo2(i64)
define void @f5() nounwind {
entry:
; 32: lui $4, 1
; 32: lui $4, 1
tail call void @f6(i32 65536) nounwind
tail call void @f6(i32 65536) nounwind
ret void
}
declare void @f6(i32)
define void @f7() nounwind {
entry:
; 64: lui $4, 1
; 64: lui $4, 1
tail call void @f8(i64 65536) nounwind
tail call void @f8(i64 65536) nounwind
ret void
}
declare void @f8(i64)