fix constexpr handling (rust-lang#659)

ZuseZ4 · web-flow · commit feed0ce56170 · 2022-05-28T02:56:14.000-04:00
* closes rust-lang#657 * Handle vector case * adding test * remove test until further bugfixes
diff --git a/enzyme/Enzyme/GradientUtils.cpp b/enzyme/Enzyme/GradientUtils.cpp
@@ -3821,6 +3821,11 @@ Value *GradientUtils::invertPointerM(Value *const oval, IRBuilder<> &BuilderM,
       }
     }
 
+    if (auto arg = dyn_cast<ConstantExpr>(oval)) {
+      auto rule = [&oval]() { return oval; };
+      return applyChainRule(oval->getType(), BuilderM, rule);
+    }
+
     Value *newval = getNewFromOriginal(oval);
 
     auto rule = [&]() { return newval; };

Original file line number	Diff line number	Diff line change
`@@ -3821,6 +3821,11 @@ Value GradientUtils::invertPointerM(Value const oval, IRBuilder<> &BuilderM,`
`3821`	`3821`	`}`
`3822`	`3822`	`}`
`3823`	`3823`
	`3824`	`+ if (auto arg = dyn_cast<ConstantExpr>(oval)) {`
	`3825`	`+ auto rule = [&oval]() { return oval; };`
	`3826`	`+ return applyChainRule(oval->getType(), BuilderM, rule);`
	`3827`	`+ }`
	`3828`	`+`
`3824`	`3829`	`Value *newval = getNewFromOriginal(oval);`
`3825`	`3830`
`3826`	`3831`	`auto rule = [&]() { return newval; };`