derek.holloway
7502bf64a4
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75 lines
2.9 KiB
LLVM
75 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=instcombine -S < %s | FileCheck %s
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define ptr @memcpy_nonconst_n(ptr %d, ptr nocapture readonly %s, i64 %n) {
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; CHECK-LABEL: @memcpy_nonconst_n(
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; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[D:%.*]], ptr align 1 [[S:%.*]], i64 [[N:%.*]], i1 false)
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; CHECK-NEXT: [[R:%.*]] = getelementptr inbounds i8, ptr [[D]], i64 [[N]]
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; CHECK-NEXT: ret ptr [[R]]
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;
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%r = tail call ptr @mempcpy(ptr %d, ptr %s, i64 %n)
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ret ptr %r
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}
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define ptr @memcpy_nonconst_n_copy_attrs(ptr %d, ptr nocapture readonly %s, i64 %n) {
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; CHECK-LABEL: @memcpy_nonconst_n_copy_attrs(
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; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 dereferenceable(16) [[D:%.*]], ptr align 1 [[S:%.*]], i64 [[N:%.*]], i1 false)
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; CHECK-NEXT: [[R:%.*]] = getelementptr inbounds i8, ptr [[D]], i64 [[N]]
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; CHECK-NEXT: ret ptr [[R]]
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;
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%r = tail call ptr @mempcpy(ptr dereferenceable(16) %d, ptr %s, i64 %n)
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ret ptr %r
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}
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define void @memcpy_nonconst_n_unused_retval(ptr %d, ptr nocapture readonly %s, i64 %n) {
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; CHECK-LABEL: @memcpy_nonconst_n_unused_retval(
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[D:%.*]], ptr align 1 [[S:%.*]], i64 [[N:%.*]], i1 false)
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; CHECK-NEXT: ret void
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;
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call ptr @mempcpy(ptr %d, ptr %s, i64 %n)
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ret void
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}
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define ptr @memcpy_small_const_n(ptr %d, ptr nocapture readonly %s) {
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; CHECK-LABEL: @memcpy_small_const_n(
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; CHECK-NEXT: [[TMP1:%.*]] = load i64, ptr [[S:%.*]], align 1
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; CHECK-NEXT: store i64 [[TMP1]], ptr [[D:%.*]], align 1
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; CHECK-NEXT: [[R:%.*]] = getelementptr inbounds nuw i8, ptr [[D]], i64 8
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; CHECK-NEXT: ret ptr [[R]]
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;
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%r = tail call ptr @mempcpy(ptr %d, ptr %s, i64 8)
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ret ptr %r
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}
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define ptr @memcpy_big_const_n(ptr %d, ptr nocapture readonly %s) {
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; CHECK-LABEL: @memcpy_big_const_n(
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; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(1024) [[D:%.*]], ptr noundef nonnull align 1 dereferenceable(1024) [[S:%.*]], i64 1024, i1 false)
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; CHECK-NEXT: [[R:%.*]] = getelementptr inbounds nuw i8, ptr [[D]], i64 1024
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; CHECK-NEXT: ret ptr [[R]]
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;
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%r = tail call ptr @mempcpy(ptr %d, ptr %s, i64 1024)
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ret ptr %r
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}
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; The original call may have attributes that can not propagate to memcpy.
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define i32 @PR48810() {
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; CHECK-LABEL: @PR48810(
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; CHECK-NEXT: store i1 true, ptr poison, align 1
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; CHECK-NEXT: ret i32 undef
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;
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%r = call dereferenceable(1) ptr @mempcpy(ptr undef, ptr null, i64 undef)
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ret i32 undef
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}
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define ptr @memcpy_no_simplify1(ptr %d, ptr nocapture readonly %s, i64 %n) {
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; CHECK-LABEL: @memcpy_no_simplify1(
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; CHECK-NEXT: [[R:%.*]] = musttail call ptr @mempcpy(ptr [[D:%.*]], ptr [[S:%.*]], i64 [[N:%.*]])
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; CHECK-NEXT: ret ptr [[R]]
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;
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%r = musttail call ptr @mempcpy(ptr %d, ptr %s, i64 %n)
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ret ptr %r
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}
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declare ptr @mempcpy(ptr, ptr nocapture readonly, i64)
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