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Bug fix: sign-extension was not happening for C = -MININT since C == -C!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6332 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2003-05-25 21:58:11 +00:00
parent f6bcd1b6bf
commit c2f0939320
1 changed files with 3 additions and 2 deletions
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5
lib/Target/SparcV9/SparcV9InstrInfo.cpp
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@ -142,8 +142,9 @@ CreateSETSWConst(const TargetMachine& target, int32_t C,
// Set the low 32 bits of dest // Set the low 32 bits of dest
CreateSETUWConst(target, (uint32_t) C, dest, mvec, /*isSigned*/true); CreateSETUWConst(target, (uint32_t) C, dest, mvec, /*isSigned*/true);
// Sign-extend to the high 32 bits if needed // Sign-extend to the high 32 bits if needed.
if (C < 0 && (-C) > (int32_t) MAXSIMM) // NOTE: The value C = 0x80000000 is bad: -C == C and so -C is < MAXSIMM
if (C < 0 && (C == -C || -C > (int32_t) MAXSIMM))
mvec.push_back(BuildMI(V9::SRA, 3).addReg(dest).addZImm(0).addRegDef(dest)); mvec.push_back(BuildMI(V9::SRA, 3).addReg(dest).addZImm(0).addRegDef(dest));
} }