[llvm] [llvm][ARM]Add widen strings pass (PR #107120)

[Nashe Mncube via llvm-commits]

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@@ -0,0 +1,25 @@
+; RUN: opt < %s -mtriple=arm-arm-none-eabi -passes=globalopt -S | FileCheck %s
+; RUN: opt < %s -mtriple=arm-arm-none-eabi -passes="default<O0>" -S | FileCheck %s --check-prefix=TURNED-OFF
+
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+
+; CHECK: [12 x i8]
+; TURNED-OFF-NOT: [12 x i8]
+ at .str = private unnamed_addr constant [10 x i8] c"123456789\00", align 1
+
+define hidden void @foo() local_unnamed_addr {
+entry:
+; CHECK: %something = alloca [12 x i8]
+; TURNED-OFF-NOT: %something = alloca [12 x i8]
+  %something = alloca [10 x i8], align 1
+  call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(10) %something, ptr noundef nonnull align 1 dereferenceable(10) @.str, i32 10, i1 false)
+  %call2 = call i32 @bar(ptr nonnull %something)
+  ret void
+}
+
+declare i32 @bar(...) local_unnamed_addr
+
+; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
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nasherm wrote:

Done

https://github.com/llvm/llvm-project/pull/107120