derek.holloway
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81 lines
2.4 KiB
LLVM
81 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; Test that the strcpy library call simplifier works correctly.
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; rdar://6839935
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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;
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; This transformation requires the pointer size, as it assumes that size_t is
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; the size of a pointer.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
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@hello = constant [6 x i8] c"hello\00"
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@a = common global [32 x i8] zeroinitializer, align 1
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@b = common global [32 x i8] zeroinitializer, align 1
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declare ptr @strcpy(ptr, ptr)
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define void @test_simplify1() {
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; CHECK-LABEL: @test_simplify1(
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(6) @a, ptr noundef nonnull align 1 dereferenceable(6) @hello, i32 6, i1 false)
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; CHECK-NEXT: ret void
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;
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call ptr @strcpy(ptr @a, ptr @hello)
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ret void
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}
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define ptr @test_simplify2() {
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; CHECK-LABEL: @test_simplify2(
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; CHECK-NEXT: ret ptr @a
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;
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%ret = call ptr @strcpy(ptr @a, ptr @a)
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ret ptr %ret
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}
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define void @test_simplify3(ptr %dst) {
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; CHECK-LABEL: @test_simplify3(
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(80) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(6) @hello, i32 6, i1 false)
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; CHECK-NEXT: ret void
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;
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call ptr @strcpy(ptr dereferenceable(80) %dst, ptr @hello)
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ret void
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}
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define ptr @test_no_simplify1() {
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; CHECK-LABEL: @test_no_simplify1(
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; CHECK-NEXT: [[RET:%.*]] = call ptr @strcpy(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(1) @b)
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; CHECK-NEXT: ret ptr [[RET]]
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;
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%ret = call ptr @strcpy(ptr @a, ptr @b)
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ret ptr %ret
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}
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define ptr @test_no_simplify2(ptr %dst, ptr %src) {
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; CHECK-LABEL: @test_no_simplify2(
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; CHECK-NEXT: [[RET:%.*]] = musttail call ptr @strcpy(ptr [[DST:%.*]], ptr [[SRC:%.*]])
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; CHECK-NEXT: ret ptr [[RET]]
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;
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%ret = musttail call ptr @strcpy(ptr %dst, ptr %src)
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ret ptr %ret
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}
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define void @test_no_incompatible_attr() {
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; CHECK-LABEL: @test_no_incompatible_attr(
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(6) @a, ptr noundef nonnull align 1 dereferenceable(6) @hello, i32 6, i1 false)
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; CHECK-NEXT: ret void
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;
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call dereferenceable(1) ptr @strcpy(ptr @a, ptr @hello)
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ret void
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}
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