56 lines
1.4 KiB
LLVM
56 lines
1.4 KiB
LLVM
; RUN: opt < %s -passes=dse -S | FileCheck %s
|
|
|
|
declare noalias ptr @malloc(i64) "malloc-like"
|
|
|
|
declare void @foo()
|
|
declare void @bar(ptr)
|
|
|
|
define void @test() {
|
|
%obj = call ptr @malloc(i64 8)
|
|
store i8 0, ptr %obj
|
|
; don't remove store. %obj should be treated like it will be read by the @foo.
|
|
; CHECK: store i8 0, ptr %obj
|
|
call void @foo() ["deopt" (ptr %obj)]
|
|
ret void
|
|
}
|
|
|
|
define void @test1() {
|
|
%obj = call ptr @malloc(i64 8)
|
|
store i8 0, ptr %obj
|
|
; CHECK: store i8 0, ptr %obj
|
|
call void @bar(ptr nocapture %obj)
|
|
ret void
|
|
}
|
|
|
|
define void @test2() {
|
|
%obj = call ptr @malloc(i64 8)
|
|
store i8 0, ptr %obj
|
|
; CHECK-NOT: store i8 0, ptr %obj
|
|
call void @foo()
|
|
ret void
|
|
}
|
|
|
|
define void @test3() {
|
|
; CHECK-LABEL: @test3(
|
|
%s = alloca i64
|
|
; Verify that this first store is not considered killed by the second one
|
|
; since it could be observed from the deopt continuation.
|
|
; CHECK: store i64 1, ptr %s
|
|
store i64 1, ptr %s
|
|
call void @foo() [ "deopt"(ptr %s) ]
|
|
store i64 0, ptr %s
|
|
ret void
|
|
}
|
|
|
|
declare noalias ptr @calloc(i64, i64) inaccessiblememonly allockind("alloc,zeroed")
|
|
|
|
define void @test4() {
|
|
; CHECK-LABEL: @test4
|
|
%local_obj = call ptr @calloc(i64 1, i64 4)
|
|
call void @foo() ["deopt" (ptr %local_obj)]
|
|
store i8 0, ptr %local_obj, align 4
|
|
; CHECK-NOT: store i8 0, ptr %local_obj, align 4
|
|
call void @bar(ptr nocapture %local_obj)
|
|
ret void
|
|
}
|