[PowerPC] Expand ISEL instruction into if-then-else sequence.
Generally, the ISEL is expanded into if-then-else sequence, in some
cases (like when the destination register is the same with the true
or false value register), it may just be expanded into just the if
or else sequence.
llvm-svn: 292154
diff --git a/llvm/lib/Target/PowerPC/PPCTargetMachine.cpp b/llvm/lib/Target/PowerPC/PPCTargetMachine.cpp
index c7b74bc..5d68f32 100644
--- a/llvm/lib/Target/PowerPC/PPCTargetMachine.cpp
+++ b/llvm/lib/Target/PowerPC/PPCTargetMachine.cpp
@@ -92,6 +92,7 @@
PassRegistry &PR = *PassRegistry::getPassRegistry();
initializePPCBoolRetToIntPass(PR);
+ initializePPCExpandISELPass(PR);
}
/// Return the datalayout string of a subtarget.
@@ -430,6 +431,8 @@
}
void PPCPassConfig::addPreEmitPass() {
+ addPass(createPPCExpandISELPass());
+
if (getOptLevel() != CodeGenOpt::None)
addPass(createPPCEarlyReturnPass(), false);
// Must run branch selection immediately preceding the asm printer.