LPM->deleteSimpleAnalysisValue(I, L);
RemoveFromWorklist(I, Worklist);
I->replaceAllUsesWith(V);
- I->eraseFromParent();
+ if (!I->mayHaveSideEffects())
+ I->eraseFromParent();
++NumSimplify;
}
--- /dev/null
+; Check that the call doesn't get removed even if
+; it has no uses. It could have side-effects.
+; RUN: opt -loop-unswitch -S %s | FileCheck %s
+
+; CHECK-LABEL: @tinky
+define i32 @tinkywinky(i8 %patatino) {
+ %cmp1 = icmp slt i8 %patatino, 5
+ br label %body
+body:
+ %i = select i1 %cmp1, i8 6, i8 undef
+ br i1 true, label %body, label %end
+end:
+ %split = phi i8 [ %i, %body ]
+ %conv4 = sext i8 %split to i32
+; CHECK: tail call fastcc i32 @fn5(
+ %call = tail call fastcc i32 @fn5(i32 %conv4)
+ ret i32 0
+}
+declare fastcc i32 @fn5(i32 returned) unnamed_addr