Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/Mem2Reg/preserve-nonnull-load-metadata.ll

@@ -1,89 +0,0 @@
-; RUN: opt < %s -mem2reg -S | FileCheck %s
-
-; This tests that mem2reg preserves the !nonnull metadata on loads
-; from allocas that get optimized out.
-
-; Check the case where the alloca in question has a single store.
-define float* @single_store(float** %arg) {
-; CHECK-LABEL: define float* @single_store
-; CHECK: %arg.load = load float*, float** %arg, align 8
-; CHECK: [[ASSUME:%(.*)]] = icmp ne float* %arg.load, null
-; CHECK: call void @llvm.assume(i1 {{.*}}[[ASSUME]])
-; CHECK: ret float* %arg.load
-entry:
-  %buf = alloca float*
-  %arg.load = load float*, float** %arg, align 8
-  store float* %arg.load, float** %buf, align 8
-  %buf.load = load float*, float **%buf, !nonnull !0
-  ret float* %buf.load
-}
-
-; Check the case where the alloca in question has more than one
-; store but still within one basic block.
-define float* @single_block(float** %arg) {
-; CHECK-LABEL: define float* @single_block
-; CHECK: %arg.load = load float*, float** %arg, align 8
-; CHECK: [[ASSUME:%(.*)]] = icmp ne float* %arg.load, null
-; CHECK: call void @llvm.assume(i1 {{.*}}[[ASSUME]])
-; CHECK: ret float* %arg.load
-entry:
-  %buf = alloca float*
-  %arg.load = load float*, float** %arg, align 8
-  store float* null, float** %buf, align 8
-  store float* %arg.load, float** %buf, align 8
-  %buf.load = load float*, float **%buf, !nonnull !0
-  ret float* %buf.load
-}
-
-; Check the case where the alloca in question has more than one
-; store and also reads ands writes in multiple blocks.
-define float* @multi_block(float** %arg) {
-; CHECK-LABEL: define float* @multi_block
-; CHECK-LABEL: entry:
-; CHECK: %arg.load = load float*, float** %arg, align 8
-; CHECK: br label %next
-; CHECK-LABEL: next:
-; CHECK: [[ASSUME:%(.*)]] = icmp ne float* %arg.load, null
-; CHECK: call void @llvm.assume(i1 {{.*}}[[ASSUME]])
-; CHECK: ret float* %arg.load
-entry:
-  %buf = alloca float*
-  %arg.load = load float*, float** %arg, align 8
-  store float* null, float** %buf, align 8
-  br label %next
-next:
-  store float* %arg.load, float** %buf, align 8
-  %buf.load = load float*, float** %buf, !nonnull !0
-  ret float* %buf.load
-}
-
-; Check that we don't add an assume if it's not
-; necessary i.e. the value is already implied to be nonnull
-define float* @no_assume(float** %arg) {
-; CHECK-LABEL: define float* @no_assume
-; CHECK-LABEL: entry:
-; CHECK: %arg.load = load float*, float** %arg, align 8
-; CHECK: %cn = icmp ne float* %arg.load, null
-; CHECK: br i1 %cn, label %next, label %fin
-; CHECK-LABEL: next:
-; CHECK-NOT: call void @llvm.assume
-; CHECK: ret float* %arg.load
-; CHECK-LABEL: fin:
-; CHECK: ret float* null
-entry:
-  %buf = alloca float*
-  %arg.load = load float*, float** %arg, align 8
-  %cn = icmp ne float* %arg.load, null
-  br i1 %cn, label %next, label %fin
-next:
-; At this point the above nonnull check ensures that
-; the value %arg.load is nonnull in this block and thus
-; we need not add the assume.
-  store float* %arg.load, float** %buf, align 8
-  %buf.load = load float*, float** %buf, !nonnull !0
-  ret float* %buf.load
-fin:
-  ret float* null
-}
-
-!0 = !{}