dc2b66b8d6
These tests cases were converted using the script at https://gist.github.com/nikic/98357b71fd67756b0f064c9517b62a34, but there was also a need to re-run update_test_checks.py (impacting nonnull/dereferencable attributes). Differential Revision: https://reviews.llvm.org/D135095
56 lines
1.6 KiB
LLVM
56 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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@str = constant [2 x i8] c"a\00"
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@str2 = constant [3 x i8] c"abc"
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@str3 = constant [4 x i8] c"abcd"
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declare ptr @strncpy(ptr, ptr, i64)
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define void @fill_with_zeros(ptr %dst) {
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; CHECK-LABEL: @fill_with_zeros(
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; CHECK-NEXT: store i32 97, ptr [[DST:%.*]], align 1
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; CHECK-NEXT: ret void
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;
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tail call ptr @strncpy(ptr %dst, ptr @str, i64 4)
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ret void
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}
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define void @fill_with_zeros2(ptr %dst) {
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; CHECK-LABEL: @fill_with_zeros2(
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; CHECK-NEXT: store i32 6513249, ptr [[DST:%.*]], align 1
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; CHECK-NEXT: ret void
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;
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tail call ptr @strncpy(ptr %dst, ptr @str2, i64 4)
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ret void
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}
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define void @fill_with_zeros3(ptr %dst) {
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; CHECK-LABEL: @fill_with_zeros3(
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; CHECK-NEXT: store i32 1684234849, ptr [[DST:%.*]], align 1
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; CHECK-NEXT: ret void
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;
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tail call ptr @strncpy(ptr %dst, ptr @str3, i64 4)
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ret void
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}
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define void @fill_with_zeros4(ptr %dst) {
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; CHECK-LABEL: @fill_with_zeros4(
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; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(128) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(128) @str.2, i64 128, i1 false)
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; CHECK-NEXT: ret void
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;
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tail call ptr @strncpy(ptr %dst, ptr @str3, i64 128)
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ret void
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}
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define void @no_simplify(ptr %dst) {
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; CHECK-LABEL: @no_simplify(
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; CHECK-NEXT: [[TMP1:%.*]] = tail call ptr @strncpy(ptr noundef nonnull dereferenceable(1) [[DST:%.*]], ptr noundef nonnull dereferenceable(5) @str3, i64 129)
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; CHECK-NEXT: ret void
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;
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tail call ptr @strncpy(ptr %dst, ptr @str3, i64 129)
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ret void
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}
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