Rollup merge of #137894 - compiler-errors:no-scalar-pair-opt, r=oli-obk

Revert "store ScalarPair via memset when one side is undef and the other side can be memset"

cc #137892
reverts #135335

r? oli-obk

2 files changed, 0 insertions, 5 deletions

diff --git a/compiler/rustc_codegen_llvm/src/common.rs b/compiler/rustc_codegen_llvm/src/common.rs
index 0621b893e75..c9851ef8431 100644
--- a/compiler/rustc_codegen_llvm/src/common.rs
+++ b/compiler/rustc_codegen_llvm/src/common.rs
@@ -127,10 +127,6 @@ impl<'ll, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
         unsafe { llvm::LLVMGetUndef(t) }
     }
 
-    fn is_undef(&self, v: &'ll Value) -> bool {
-        unsafe { llvm::LLVMIsUndef(v) == True }
-    }
-
     fn const_poison(&self, t: &'ll Type) -> &'ll Value {
         unsafe { llvm::LLVMGetPoison(t) }
     }
diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index 2dc14e4613d..e3d0b928c97 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -1046,7 +1046,6 @@ unsafe extern "C" {
     pub(crate) fn LLVMMetadataTypeInContext(C: &Context) -> &Type;
 
     // Operations on all values
-    pub(crate) fn LLVMIsUndef(Val: &Value) -> Bool;
     pub(crate) fn LLVMTypeOf(Val: &Value) -> &Type;
     pub(crate) fn LLVMGetValueName2(Val: &Value, Length: *mut size_t) -> *const c_char;
     pub(crate) fn LLVMSetValueName2(Val: &Value, Name: *const c_char, NameLen: size_t);