[clang] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq c))` (PR #65852)

2023-09-18 Thread Yingwei Zheng via cfe-commits
https://github.com/dtcxzyw updated https://github.com/llvm/llvm-project/pull/65852 >From d9d8bcbb98e8f5aecb9733329389d61a489bd731 Mon Sep 17 00:00:00 2001 From: Yingwei Zheng Date: Sat, 9 Sep 2023 23:07:29 +0800 Subject: [PATCH 1/3] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq

[clang] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq c))` (PR #65852)

2023-09-18 Thread Yingwei Zheng via cfe-commits
https://github.com/dtcxzyw resolved https://github.com/llvm/llvm-project/pull/65852 ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits

[clang] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq c))` (PR #65852)

2023-09-18 Thread Yingwei Zheng via cfe-commits
https://github.com/dtcxzyw updated https://github.com/llvm/llvm-project/pull/65852 >From d9d8bcbb98e8f5aecb9733329389d61a489bd731 Mon Sep 17 00:00:00 2001 From: Yingwei Zheng Date: Sat, 9 Sep 2023 23:07:29 +0800 Subject: [PATCH 1/2] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq

[clang] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq c))` (PR #65852)

2023-09-18 Thread Yingwei Zheng via cfe-commits
https://github.com/dtcxzyw resolved https://github.com/llvm/llvm-project/pull/65852 ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits

[clang] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq c))` (PR #65852)

2023-09-18 Thread via cfe-commits
llvmbot wrote: @llvm/pr-subscribers-llvm-transforms Changes This patch folds the pattern `a ne/eq (zext (a ne/eq c))` into a boolean constant or a compare. Clang vs GCC: https://godbolt.org/z/4ro817WE8 Alive2: https://alive2.llvm.org/ce/z/6z9NRF Fixes #65073. --- Full diff:

[clang] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq c))` (PR #65852)

2023-09-18 Thread Yingwei Zheng via cfe-commits
https://github.com/dtcxzyw updated https://github.com/llvm/llvm-project/pull/65852 >From d9d8bcbb98e8f5aecb9733329389d61a489bd731 Mon Sep 17 00:00:00 2001 From: Yingwei Zheng Date: Sat, 9 Sep 2023 23:07:29 +0800 Subject: [PATCH] [InstCombine] Simplify the pattern `a ne/eq (zext (a ne/eq c))`