Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/test/Feature/OperandBundles/dse.ll

@@ -1,62 +0,0 @@
-; RUN: opt -S -dse < %s | FileCheck %s
-
-declare void @f()
-declare noalias i8* @malloc(i32) nounwind
-
-define void @test_0() {
-; CHECK-LABEL: @test_0(
-  %m = call i8* @malloc(i32 24)
-  tail call void @f() [ "unknown"(i8* %m) ]
-; CHECK: store i8 -19, i8* %m
-  store i8 -19, i8* %m
-  ret void
-}
-
-define i8* @test_1() {
-; CHECK-LABEL: @test_1(
-  %m = call i8* @malloc(i32 24)
-  tail call void @f() [ "unknown"(i8* %m) ]
-  store i8 -19, i8* %m
-  tail call void @f()
-  store i8 101, i8* %m
-
-; CHECK: tail call void @f() [ "unknown"(i8* %m) ]
-; CHECK: store i8 -19, i8* %m
-; CHECK: tail call void @f()
-; CHECK: store i8 101, i8* %m
-
-  ret i8* %m
-}
-
-define void @test_2() {
-; Since the deopt operand bundle does not escape %m (see caveat below), it is
-; legal to elide the final store that location.
-
-; CHECK-LABEL: @test_2(
-  %m = call i8* @malloc(i32 24)
-  tail call void @f() [ "deopt"(i8* %m) ]
-  store i8 -19, i8* %m
-  ret void
-
-; CHECK:  tail call void @f() [ "deopt"(i8* %m) ]
-; CHECK-NEXT:  ret void
-}
-
-define i8* @test_3() {
-; Since the deopt operand bundle does not escape %m (see caveat below), @f
-; cannot observe the stores to %m
-
-; CHECK-LABEL: @test_3(
-  %m = call i8* @malloc(i32 24)
-  tail call void @f() [ "deopt"(i8* %m) ]
-  store i8 -19, i8* %m
-  tail call void @f()
-  store i8 101, i8* %m
-  ret i8* %m
-}
-
-
-; Caveat: technically, %m can only escape if the calling function is deoptimized
-; at the call site (i.e. the call returns to the "deopt" continuation).  Since
-; the calling function body will be invalidated in that case, the calling
-; function can be optimized under the assumption that %m does not escape.