mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
5b5782c20e
Summary: In RewriteStatepointsForGC pass, we create a gc_relocate intrinsic for each relocated pointer, and the gc_relocate has the same type with the pointer. During the creation of gc_relocate intrinsic, llvm requires to mangle its type. However, llvm does not support mangling of all possible types. RewriteStatepointsForGC will hit an assertion failure when it tries to create a gc_relocate for pointer to vector of pointers because mangling for vector of pointers is not supported. This patch changes the way RewriteStatepointsForGC pass creates gc_relocate. For each relocated pointer, we erase the type of pointers and create an unified gc_relocate of type i8 addrspace(1)*. Then a bitcast is inserted to convert the gc_relocate to the correct type. In this way, gc_relocate does not need to deal with different types of pointers and the unsupported type mangling is no longer a problem. This change would also ease further merge when LLVM erases types of pointers and introduces an unified pointer type. Some minor changes are also introduced to gc_relocate related part in InstCombineCalls, CodeGenPrepare, and Verifier accordingly. Patch by Chen Li! Reviewers: reames, AndyAyers, sanjoy Reviewed By: sanjoy Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D9592 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237009 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
2.1 KiB
LLVM
67 lines
2.1 KiB
LLVM
; RUN: opt -rewrite-statepoints-for-gc -S < %s | FileCheck %s
|
|
|
|
declare void @consume(...)
|
|
|
|
; Test to make sure we destroy LCSSA's single entry phi nodes before
|
|
; running liveness
|
|
define void @test6(i64 addrspace(1)* %obj) gc "statepoint-example" {
|
|
; CHECK-LABEL: @test6
|
|
entry:
|
|
br label %next
|
|
|
|
next:
|
|
; CHECK-LABEL: next:
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: gc.relocate
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: @consume(i64 addrspace(1)* %obj.relocated.casted)
|
|
; CHECK-NEXT: @consume(i64 addrspace(1)* %obj.relocated.casted)
|
|
%obj2 = phi i64 addrspace(1)* [ %obj, %entry ]
|
|
call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 0, i32 0)
|
|
call void (...) @consume(i64 addrspace(1)* %obj2)
|
|
call void (...) @consume(i64 addrspace(1)* %obj)
|
|
ret void
|
|
}
|
|
|
|
declare void @some_call(i64 addrspace(1)*)
|
|
|
|
; Need to delete unreachable gc.statepoint call
|
|
define void @test7() gc "statepoint-example" {
|
|
; CHECK-LABEL: test7
|
|
; CHECK-NOT: gc.statepoint
|
|
ret void
|
|
|
|
unreached:
|
|
%obj = phi i64 addrspace(1)* [null, %unreached]
|
|
call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 0, i32 0)
|
|
call void (...) @consume(i64 addrspace(1)* %obj)
|
|
br label %unreached
|
|
}
|
|
|
|
; Need to delete unreachable gc.statepoint invoke - tested seperately given
|
|
; a correct implementation could only remove the instructions, not the block
|
|
define void @test8() gc "statepoint-example" {
|
|
; CHECK-LABEL: test8
|
|
; CHECK-NOT: gc.statepoint
|
|
ret void
|
|
|
|
unreached:
|
|
invoke i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 0, i32 0)
|
|
to label %normal_return unwind label %exceptional_return
|
|
|
|
normal_return: ; preds = %entry
|
|
ret void
|
|
|
|
exceptional_return: ; preds = %entry
|
|
%landing_pad4 = landingpad { i8*, i32 } personality i32 ()* undef
|
|
cleanup
|
|
ret void
|
|
}
|
|
|
|
declare void @foo()
|
|
; Bound the last check-not
|
|
; CHECK-LABEL: @foo
|
|
|
|
declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()*, i32, i32, ...)
|
|
|