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