[PATCH] D128128: [GlobalOpt] Perform store->dominated load forwarding for stored once globals
Ting Wang via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Jun 23 00:36:40 PDT 2022
tingwang added a comment.
target datalayout = "e-m:e-i64:64-p:64:64-n32:64-S128-v256:256:256-v512:512:512"
target triple = "powerpc64le-unknown-linux-gnu"
@j = internal unnamed_addr global i32 0, align 4
; Function Attrs: nobuiltin nofree noinline nosync
define dso_local signext i32 @recursive_sub(i32* noalias nocapture dereferenceable(4) %.i) local_unnamed_addr #4 {
recursive_sub_entry:
%_val_i_ = load i32, i32* %.i, align 4
%_add_tmp = sub i32 6, %_val_i_
store i32 %_add_tmp, i32* @j, align 4
%_add_tmp8 = add nsw i32 %_val_i_, 1
store i32 %_add_tmp8, i32* %.i, align 4
%0 = tail call i32 @recursive_sub(i32* nonnull %.i)
%_val_ptr_ = load i32, i32* @j, align 4
%_add_tmp11 = add nsw i32 %_val_ptr_, %0
ret i32 1
}
attributes #4 = { nobuiltin nofree noinline nosync }
opt -globalopt -S < %s
; ModuleID = '<stdin>'
source_filename = "<stdin>"
target datalayout = "e-m:e-i64:64-p:64:64-n32:64-S128-v256:256:256-v512:512:512"
target triple = "powerpc64le-unknown-linux-gnu"
; Function Attrs: nobuiltin nofree noinline nosync
define dso_local signext i32 @recursive_sub(i32* noalias nocapture dereferenceable(4) %.i) local_unnamed_addr #0 {
recursive_sub_entry:
%_val_i_ = load i32, i32* %.i, align 4
%_add_tmp = sub i32 6, %_val_i_
%_add_tmp8 = add nsw i32 %_val_i_, 1
store i32 %_add_tmp8, i32* %.i, align 4
%0 = tail call i32 @recursive_sub(i32* nonnull %.i)
%_add_tmp11 = add nsw i32 %_add_tmp, %0
ret i32 1
}
attributes #0 = { nobuiltin nofree noinline nosync }
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D128128/new/
https://reviews.llvm.org/D128128
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