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5c7f7462e4
This changes the shape of the statepoint intrinsic from:
@llvm.experimental.gc.statepoint(anyptr target, i32 # call args, i32 unused, ...call args, i32 # deopt args, ...deopt args, ...gc args)
to:
@llvm.experimental.gc.statepoint(anyptr target, i32 # call args, i32 flags, ...call args, i32 # transition args, ...transition args, i32 # deopt args, ...deopt args, ...gc args)
This extension offers the backend the opportunity to insert (somewhat) arbitrary code to manage the transition from GC-aware code to code that is not GC-aware and back.
In order to support the injection of transition code, this extension wraps the STATEPOINT ISD node generated by the usual lowering lowering with two additional nodes: GC_TRANSITION_START and GC_TRANSITION_END. The transition arguments that were passed passed to the intrinsic (if any) are lowered and provided as operands to these nodes and may be used by the backend during code generation.
Eventually, the lowering of the GC_TRANSITION_{START,END} nodes should be informed by the GC strategy in use for the function containing the intrinsic call; for now, these nodes are instead replaced with no-ops.
Differential Revision: http://reviews.llvm.org/D9501
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236888 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
2.8 KiB
LLVM
58 lines
2.8 KiB
LLVM
; RUN: opt -verify -S < %s
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; Tests the name mangling performed by the codepath following
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; getMangledTypeStr(). Only tests that code with the various manglings
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; run fine: doesn't actually test the mangling with the type of the
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; arguments. Meant to serve as an example-document on how the user
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; should do name manglings.
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; Exercise the most general case, llvm_anyptr_type, using gc.relocate
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; and gc.statepoint. Note that it has nothing to do with gc.*
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; functions specifically: any function that accepts llvm_anyptr_type
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; will serve the purpose.
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; function and integer
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define i32* @test_iAny(i32* %v) gc "statepoint-example" {
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%tok = call i32 (i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, i32* %v)
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%v-new = call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 5, i32 5)
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ret i32* %v-new
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}
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; float
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define float* @test_fAny(float* %v) gc "statepoint-example" {
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%tok = call i32 (i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, float* %v)
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%v-new = call float* @llvm.experimental.gc.relocate.p0f32(i32 %tok, i32 5, i32 5)
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ret float* %v-new
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}
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; array of integers
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define [3 x i32]* @test_aAny([3 x i32]* %v) gc "statepoint-example" {
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%tok = call i32 (i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, [3 x i32]* %v)
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%v-new = call [3 x i32]* @llvm.experimental.gc.relocate.p0a3i32(i32 %tok, i32 5, i32 5)
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ret [3 x i32]* %v-new
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}
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; vector of integers
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define <3 x i32>* @test_vAny(<3 x i32>* %v) gc "statepoint-example" {
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%tok = call i32 (i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, <3 x i32>* %v)
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%v-new = call <3 x i32>* @llvm.experimental.gc.relocate.p0v3i32(i32 %tok, i32 5, i32 5)
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ret <3 x i32>* %v-new
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}
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%struct.test = type { i32, i1 }
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; struct
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define %struct.test* @test_struct(%struct.test* %v) gc "statepoint-example" {
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%tok = call i32 (i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, %struct.test* %v)
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%v-new = call %struct.test* @llvm.experimental.gc.relocate.p0struct.test(i32 %tok, i32 5, i32 5)
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ret %struct.test* %v-new
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}
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declare zeroext i1 @return_i1()
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declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()*, i32, i32, ...)
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declare i32* @llvm.experimental.gc.relocate.p0i32(i32, i32, i32)
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declare float* @llvm.experimental.gc.relocate.p0f32(i32, i32, i32)
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declare [3 x i32]* @llvm.experimental.gc.relocate.p0a3i32(i32, i32, i32)
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declare <3 x i32>* @llvm.experimental.gc.relocate.p0v3i32(i32, i32, i32)
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declare %struct.test* @llvm.experimental.gc.relocate.p0struct.test(i32, i32, i32)
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