// value (the value that feeds into the phi from the loop latch).
// We allow both, but they, obviously, have different values.
- // We only expect at most one of each kind of user. This is because LCSSA will
- // canonicalize the users to a single PHI node per exit block, and we
- // currently only vectorize loops with a single exit.
assert(OrigLoop->getExitBlock() && "Expected a single exit block");
// An external user of the last iteration's value should see the value that
auto *User = cast<PHINode>(UI);
if (User->getBasicBlockIndex(MiddleBlock) == -1)
User->addIncoming(EndValue, MiddleBlock);
- break;
}
}
Value *Escape = II.transform(B, CMO, PSE.getSE(), DL);
Escape->setName("ind.escape");
User->addIncoming(Escape, MiddleBlock);
- break;
}
}
}
for.end:
ret i32* %inc.lag1
}
+
+; CHECK-LABEL: @multiphi
+; CHECK-LABEL: scalar.ph:
+; CHECK: %bc.resume.val = phi i32 [ %n.vec, %middle.block ], [ 0, %entry ]
+; CHECK-LABEL: for.end:
+; CHECK: %phi = phi i32 [ {{.*}}, %for.body ], [ %n.vec, %middle.block ]
+; CHECK: %phi2 = phi i32 [ {{.*}}, %for.body ], [ %n.vec, %middle.block ]
+; CHECK: store i32 %phi2, i32* %p
+; CHECK: ret i32 %phi
+define i32 @multiphi(i32 %k, i32* %p) {
+entry:
+ br label %for.body
+
+for.body:
+ %inc.phi = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+ %inc = add nsw i32 %inc.phi, 1
+ %cmp = icmp eq i32 %inc, %k
+ br i1 %cmp, label %for.end, label %for.body
+
+for.end:
+ %phi = phi i32 [ %inc, %for.body ]
+ %phi2 = phi i32 [ %inc, %for.body ]
+ store i32 %phi2, i32* %p
+ ret i32 %phi
+}