operand-bundles.ll
1.35 KB
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; RUN: opt < %s -basic-aa -dse -enable-dse-memoryssa=false -S | FileCheck %s
declare noalias i8* @malloc(i64) "malloc-like"
declare void @foo()
declare void @bar(i8*)
define void @test() {
%obj = call i8* @malloc(i64 8)
store i8 0, i8* %obj
; don't remove store. %obj should be treated like it will be read by the @foo.
; CHECK: store i8 0, i8* %obj
call void @foo() ["deopt" (i8* %obj)]
ret void
}
define void @test1() {
%obj = call i8* @malloc(i64 8)
store i8 0, i8* %obj
; CHECK: store i8 0, i8* %obj
call void @bar(i8* nocapture %obj)
ret void
}
define void @test2() {
%obj = call i8* @malloc(i64 8)
store i8 0, i8* %obj
; CHECK-NOT: store i8 0, i8* %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, i64* %s
store i64 1, i64* %s
call void @foo() [ "deopt"(i64* %s) ]
store i64 0, i64* %s
ret void
}
declare noalias i8* @calloc(i64, i64)
define void @test4() {
; CHECK-LABEL: @test4
%local_obj = call i8* @calloc(i64 1, i64 4)
call void @foo() ["deopt" (i8* %local_obj)]
store i8 0, i8* %local_obj, align 4
; CHECK-NOT: store i8 0, i8* %local_obj, align 4
call void @bar(i8* nocapture %local_obj)
ret void
}