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BlockHasNoFallThrough() now returns true if block ends with a return instruction.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37266 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-05-21 18:44:17 +00:00
parent eaeeb6fbda
commit 126f17a176
3 changed files with 8 additions and 0 deletions
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2
lib/Target/Alpha/AlphaInstrInfo.cpp
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@ -239,6 +239,8 @@ bool AlphaInstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
if (MBB.empty()) return false;
switch (MBB.back().getOpcode()) {
case Alpha::RETDAG: // Return.
case Alpha::RETDAGp:
case Alpha::BR: // Uncond branch.
case Alpha::JMP: // Indirect branch.
return true;

1
lib/Target/PowerPC/PPCInstrInfo.cpp
View File

@ -276,6 +276,7 @@ bool PPCInstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
if (MBB.empty()) return false;
switch (MBB.back().getOpcode()) {
case PPC::BLR: // Return.
case PPC::B: // Uncond branch.
case PPC::BCTR: // Indirect branch.
return true;

5
lib/Target/X86/X86InstrInfo.cpp
View File

@ -486,6 +486,11 @@ bool X86InstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
if (MBB.empty()) return false;
switch (MBB.back().getOpcode()) {
case X86::RET: // Return.
case X86::RETI:
case X86::TAILJMPd:
case X86::TAILJMPr:
case X86::TAILJMPm:
case X86::JMP: // Uncond branch.
case X86::JMP32r: // Indirect branch.
case X86::JMP32m: // Indirect branch through mem.