mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 10:42:39 +01:00
99ca015392
Teach LLVM optimize to more precisely in the presence of "deopt" operand bundles. "deopt" operand bundles imply that the call they're attached to is at least `readonly` (i.e. they don't imply clobber semantics), and they don't capture their bundle operands. llvm-svn: 254118
50 lines
1.1 KiB
LLVM
50 lines
1.1 KiB
LLVM
; RUN: opt -S -adce < %s | FileCheck %s
|
|
|
|
; While it is normally okay to DCE out calls to @readonly_function and
|
|
; @readnone_function, we cannot do that if they're carrying operand
|
|
; bundles since the presence of unknown operand bundles implies
|
|
; arbitrary memory effects.
|
|
|
|
declare void @readonly_function() readonly nounwind
|
|
declare void @readnone_function() readnone nounwind
|
|
|
|
define void @test0() {
|
|
; CHECK-LABEL: @test0(
|
|
entry:
|
|
call void @readonly_function() [ "tag"() ]
|
|
; CHECK: call void @readonly_function
|
|
ret void
|
|
}
|
|
|
|
define void @test1() {
|
|
; CHECK-LABEL: @test1(
|
|
entry:
|
|
call void @readnone_function() [ "tag"() ]
|
|
; CHECK: call void @readnone_function
|
|
ret void
|
|
}
|
|
|
|
define void @test2() {
|
|
; CHECK-LABEL: @test2(
|
|
entry:
|
|
; CHECK-NOT: @readonly_function(
|
|
call void @readonly_function() readonly [ "tag"() ]
|
|
ret void
|
|
}
|
|
|
|
define void @test3() {
|
|
; CHECK-LABEL: @test3(
|
|
entry:
|
|
; CHECK-NOT: @readnone_function(
|
|
call void @readnone_function() readnone [ "tag"() ]
|
|
ret void
|
|
}
|
|
|
|
define void @test4() {
|
|
; CHECK-LABEL: @test4(
|
|
entry:
|
|
; CHECK-NOT: @readonly_function()
|
|
call void @readonly_function() [ "deopt"() ]
|
|
ret void
|
|
}
|