They're not necessary (since the stack pointer is trivially restored on
return), and the way LLVM inserts the stackrestore calls breaks the
IR (we get a stackrestore between the deoptimize call and the return).
llvm-svn: 265101
// Insert a call to llvm.stackrestore before any return instructions in the
// inlined function.
for (ReturnInst *RI : Returns) {
- // Don't insert llvm.stackrestore calls between a musttail call and a
- // return. The return will restore the stack pointer.
+ // Don't insert llvm.stackrestore calls between a musttail or deoptimize
+ // call and a return. The return will restore the stack pointer.
if (InlinedMustTailCalls && RI->getParent()->getTerminatingMustTailCall())
continue;
+ if (InlinedDeoptimizeCalls && RI->getParent()->getTerminatingDeoptimizeCall())
+ continue;
IRBuilder<>(RI).CreateCall(StackRestore, SavedPtr);
}
}
call i8 @callee_with_alloca();
ret void
}
+
+define i8 @callee_with_dynamic_alloca(i32 %n) alwaysinline {
+ %p = alloca i8, i32 %n
+ %v = call i8(...) @llvm.experimental.deoptimize.i8(i32 1) [ "deopt"(i8* %p) ]
+ ret i8 %v
+}
+
+define void @caller_with_stacksaverestore(i32 %n) {
+; CHECK-LABEL: void @caller_with_stacksaverestore(
+; CHECK: call void (...) @llvm.experimental.deoptimize.isVoid(i32 1) [ "deopt"(i8* %p.i) ]
+; CHECK-NEXT: ret void
+
+ %p = alloca i32, i32 %n
+ call i8 @callee_with_dynamic_alloca(i32 %n)
+ ret void
+}