From 814c9f4e0c4dd72c9df600ec45e40efd72ef55f0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?D=C3=A1vid=20Bolvansk=C3=BD?= Date: Thu, 16 Jun 2022 20:15:56 +0200 Subject: [PATCH] [NFC] Precommited tests from D73000 --- llvm/test/Transforms/InstCombine/memchr-7.ll | 97 ++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 llvm/test/Transforms/InstCombine/memchr-7.ll diff --git a/llvm/test/Transforms/InstCombine/memchr-7.ll b/llvm/test/Transforms/InstCombine/memchr-7.ll new file mode 100644 index 000000000000..6310da886dec --- /dev/null +++ b/llvm/test/Transforms/InstCombine/memchr-7.ll @@ -0,0 +1,97 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt < %s -instcombine -S | FileCheck %s + +@.str = private unnamed_addr constant [27 x i8] c"abcdefghijklmnopqrstuvwxyz\00", align 1 +@.str.1 = private unnamed_addr constant [2 x i8] c"\0D\0A", align 1 + +declare i8* @strchr(i8*, i32) +declare i8* @memchr(i8*, i32, i64) + +define zeroext i1 @strchr_to_memchr_n_equals_len(i32 %c) { +; CHECK-LABEL: @strchr_to_memchr_n_equals_len( +; CHECK-NEXT: [[MEMCHR:%.*]] = tail call i8* @memchr(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 [[C:%.*]], i64 27) +; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8* [[MEMCHR]], null +; CHECK-NEXT: ret i1 [[CMP]] +; + %call = tail call i8* @strchr(i8* nonnull dereferenceable(27) getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 %c) + %cmp = icmp ne i8* %call, null + ret i1 %cmp +} + +define zeroext i1 @memchr_n_equals_len(i32 %c) { +; CHECK-LABEL: @memchr_n_equals_len( +; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @memchr(i8* noundef nonnull dereferenceable(3) getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 [[C:%.*]], i64 2) +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8* [[CALL]], null +; CHECK-NEXT: ret i1 [[CMP]] +; + %call = tail call i8* @memchr(i8* nonnull dereferenceable(3) getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 %c, i64 2) + %cmp = icmp eq i8* %call, null + ret i1 %cmp +} + +define zeroext i1 @memchr_n_less_than_len(i32 %c) { +; CHECK-LABEL: @memchr_n_less_than_len( +; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @memchr(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 [[C:%.*]], i64 15) +; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8* [[CALL]], null +; CHECK-NEXT: ret i1 [[CMP]] +; + %call = tail call i8* @memchr(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 %c, i64 15) + %cmp = icmp ne i8* %call, null + ret i1 %cmp +} + + +define zeroext i1 @memchr_n_more_than_len(i32 %c) { +; CHECK-LABEL: @memchr_n_more_than_len( +; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @memchr(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 [[C:%.*]], i64 30) +; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8* [[CALL]], null +; CHECK-NEXT: ret i1 [[CMP]] +; + %call = tail call i8* @memchr(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 %c, i64 30) + %cmp = icmp ne i8* %call, null + ret i1 %cmp +} + +; Negative test - no comparison with zero + +define i8* @memchr_no_zero_cmp(i32 %c) { +; CHECK-LABEL: @memchr_no_zero_cmp( +; CHECK-NEXT: [[MEMCHR:%.*]] = tail call i8* @memchr(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 [[C:%.*]], i64 27) +; CHECK-NEXT: ret i8* [[MEMCHR]] +; + %call = tail call i8* @strchr(i8* nonnull dereferenceable(27) getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 %c) + ret i8* %call +} + +define i8* @memchr_no_zero_cmp2(i32 %c) { +; CHECK-LABEL: @memchr_no_zero_cmp2( +; CHECK-NEXT: [[MEMCHR:%.*]] = tail call i8* @memchr(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 [[C:%.*]], i64 3) +; CHECK-NEXT: ret i8* [[MEMCHR]] +; + %call = tail call i8* @strchr(i8* nonnull dereferenceable(3) getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 %c) + ret i8* %call +} + +; Negative test - opt for size + +define zeroext i1 @memchr_n_equals_len_minsize(i32 %c) minsize { +; CHECK-LABEL: @memchr_n_equals_len_minsize( +; CHECK-NEXT: [[MEMCHR:%.*]] = tail call i8* @memchr(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 [[C:%.*]], i64 27) +; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8* [[MEMCHR]], null +; CHECK-NEXT: ret i1 [[CMP]] +; + %call = tail call i8* @strchr(i8* nonnull dereferenceable(27) getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 %c) + %cmp = icmp ne i8* %call, null + ret i1 %cmp +} + +define zeroext i1 @memchr_n_equals_len2_minsize(i32 %c) minsize { +; CHECK-LABEL: @memchr_n_equals_len2_minsize( +; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @memchr(i8* noundef nonnull dereferenceable(3) getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 [[C:%.*]], i64 2) +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8* [[CALL]], null +; CHECK-NEXT: ret i1 [[CMP]] +; + %call = tail call i8* @memchr(i8* nonnull dereferenceable(3) getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 %c, i64 2) + %cmp = icmp eq i8* %call, null + ret i1 %cmp +}