106 lines
3.4 KiB
LLVM
106 lines
3.4 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=memcpyopt < %s -verify-memoryssa | FileCheck %s
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declare void @may_throw(ptr nocapture %x)
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define void @test1(ptr nocapture noalias dereferenceable(4) %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @may_throw(ptr nonnull [[T]])
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[T]], align 4
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; CHECK-NEXT: store i32 [[LOAD]], ptr [[X:%.*]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%t = alloca i32, align 4
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call void @may_throw(ptr nonnull %t)
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%load = load i32, ptr %t, align 4
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store i32 %load, ptr %x, align 4
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ret void
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}
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declare void @always_throws()
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define void @test2(ptr nocapture noalias dereferenceable(4) %x) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @may_throw(ptr nonnull [[T]]) #[[ATTR0:[0-9]+]]
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[T]], align 4
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; CHECK-NEXT: call void @always_throws()
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; CHECK-NEXT: store i32 [[LOAD]], ptr [[X:%.*]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%t = alloca i32, align 4
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call void @may_throw(ptr nonnull %t) nounwind
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%load = load i32, ptr %t, align 4
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call void @always_throws()
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store i32 %load, ptr %x, align 4
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ret void
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}
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; byval argument is not visible on unwind.
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define void @test_byval(ptr nocapture noalias dereferenceable(4) byval(i32) %x) {
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; CHECK-LABEL: @test_byval(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @may_throw(ptr nonnull [[X:%.*]])
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; CHECK-NEXT: ret void
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;
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entry:
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%t = alloca i32, align 4
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call void @may_throw(ptr nonnull %t)
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%load = load i32, ptr %t, align 4
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store i32 %load, ptr %x, align 4
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ret void
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}
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define void @test_dead_on_unwind(ptr nocapture noalias writable dead_on_unwind dereferenceable(4) %x) {
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; CHECK-LABEL: @test_dead_on_unwind(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @may_throw(ptr nonnull [[X:%.*]])
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; CHECK-NEXT: ret void
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;
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entry:
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%t = alloca i32, align 4
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call void @may_throw(ptr nonnull %t)
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%load = load i32, ptr %t, align 4
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store i32 %load, ptr %x, align 4
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ret void
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}
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; Same as previous test, but dereferenceability information is provided by sret.
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define void @test_dead_on_unwind_sret(ptr nocapture noalias writable dead_on_unwind sret(i32) %x) {
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; CHECK-LABEL: @test_dead_on_unwind_sret(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @may_throw(ptr nonnull [[X:%.*]])
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; CHECK-NEXT: ret void
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;
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entry:
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%t = alloca i32, align 4
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call void @may_throw(ptr nonnull %t)
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%load = load i32, ptr %t, align 4
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store i32 %load, ptr %x, align 4
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ret void
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}
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define void @test_dead_on_unwind_missing_writable(ptr nocapture noalias dead_on_unwind dereferenceable(4) %x) {
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; CHECK-LABEL: @test_dead_on_unwind_missing_writable(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @may_throw(ptr nonnull [[T]])
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[T]], align 4
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; CHECK-NEXT: store i32 [[LOAD]], ptr [[X:%.*]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%t = alloca i32, align 4
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call void @may_throw(ptr nonnull %t)
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%load = load i32, ptr %t, align 4
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store i32 %load, ptr %x, align 4
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ret void
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}
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