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https://github.com/c64scene-ar/llvm-6502.git
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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
97 lines
3.4 KiB
LLVM
97 lines
3.4 KiB
LLVM
; Test that we can correctly handle vectors of pointers in statepoint
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; rewriting. Currently, we scalarize, but that's an implementation detail.
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; RUN: opt %s -rewrite-statepoints-for-gc -S | FileCheck %s
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; A non-vector relocation for comparison
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define i64 addrspace(1)* @test(i64 addrspace(1)* %obj) gc "statepoint-example" {
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; CHECK-LABEL: test
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; CHECK: gc.statepoint
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; CHECK-NEXT: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: ret i64 addrspace(1)* %obj.relocated.casted
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entry:
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%safepoint_token = call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0)
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ret i64 addrspace(1)* %obj
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}
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; A base vector from a argument
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define <2 x i64 addrspace(1)*> @test2(<2 x i64 addrspace(1)*> %obj) gc "statepoint-example" {
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; CHECK-LABEL: test2
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; CHECK: extractelement
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; CHECK-NEXT: extractelement
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; CHECK-NEXT: gc.statepoint
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; CHECK-NEXT: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: ret <2 x i64 addrspace(1)*> %7
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entry:
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%safepoint_token = call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0)
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ret <2 x i64 addrspace(1)*> %obj
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}
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; A base vector from a load
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define <2 x i64 addrspace(1)*> @test3(<2 x i64 addrspace(1)*>* %ptr) gc "statepoint-example" {
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; CHECK-LABEL: test3
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; CHECK: load
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; CHECK-NEXT: extractelement
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; CHECK-NEXT: extractelement
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; CHECK-NEXT: gc.statepoint
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; CHECK-NEXT: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: ret <2 x i64 addrspace(1)*> %7
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entry:
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%obj = load <2 x i64 addrspace(1)*>, <2 x i64 addrspace(1)*>* %ptr
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%safepoint_token = call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0)
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ret <2 x i64 addrspace(1)*> %obj
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}
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declare i32 @fake_personality_function()
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; When a statepoint is an invoke rather than a call
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define <2 x i64 addrspace(1)*> @test4(<2 x i64 addrspace(1)*>* %ptr) gc "statepoint-example" {
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; CHECK-LABEL: test4
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; CHECK: load
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; CHECK-NEXT: extractelement
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; CHECK-NEXT: extractelement
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; CHECK-NEXT: gc.statepoint
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entry:
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%obj = load <2 x i64 addrspace(1)*>, <2 x i64 addrspace(1)*>* %ptr
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invoke i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0)
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to label %normal_return unwind label %exceptional_return
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; CHECK-LABEL: normal_return:
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; CHECK: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: ret <2 x i64 addrspace(1)*> %8
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normal_return: ; preds = %entry
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ret <2 x i64 addrspace(1)*> %obj
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; CHECK-LABEL: exceptional_return:
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; CHECK: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: insertelement
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; CHECK-NEXT: ret <2 x i64 addrspace(1)*> %14
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exceptional_return: ; preds = %entry
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%landing_pad4 = landingpad { i8*, i32 } personality i32 ()* @fake_personality_function
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cleanup
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ret <2 x i64 addrspace(1)*> %obj
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}
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declare void @do_safepoint()
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declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()*, i32, i32, ...)
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