Add a function to check whether a ValueRef is a constant

dotdash · dotdash · commit 75a08622e875 · 2013-07-25T12:06:57.000+02:00
diff --git a/src/librustc/middle/trans/common.rs b/src/librustc/middle/trans/common.rs
@@ -850,6 +850,12 @@ pub fn const_get_elt(cx: &CrateContext, v: ValueRef, us: &[c_uint])
     }
 }
 
+pub fn is_const(v: ValueRef) -> bool {
+    unsafe {
+        llvm::LLVMIsConstant(v) == True
+    }
+}
+
 pub fn const_to_int(v: ValueRef) -> c_longlong {
     unsafe {
         llvm::LLVMConstIntGetSExtValue(v)

Original file line number	Diff line number	Diff line change
`@@ -850,6 +850,12 @@ pub fn const_get_elt(cx: &CrateContext, v: ValueRef, us: &[c_uint])`
`850`	`850`	`}`
`851`	`851`	`}`
`852`	`852`
	`853`	`+pub fn is_const(v: ValueRef) -> bool {`
	`854`	`+ unsafe {`
	`855`	`+ llvm::LLVMIsConstant(v) == True`
	`856`	`+ }`
	`857`	`+}`
	`858`	`+`
`853`	`859`	`pub fn const_to_int(v: ValueRef) -> c_longlong {`
`854`	`860`	`unsafe {`
`855`	`861`	`llvm::LLVMConstIntGetSExtValue(v)`