mirror of
https://github.com/c64scene-ar/llvm-6502.git
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ead2d1fbe0
Summary: This change adds two new parameters to the statepoint intrinsic, `i64 id` and `i32 num_patch_bytes`. `id` gets propagated to the ID field in the generated StackMap section. If the `num_patch_bytes` is non-zero then the statepoint is lowered to `num_patch_bytes` bytes of nops instead of a call (the spill and reload code remains unchanged). A non-zero `num_patch_bytes` is useful in situations where a language runtime requires complete control over how a call is lowered. This change brings statepoints one step closer to patchpoints. With some additional work (that is not part of this patch) it should be possible to get rid of `TargetOpcode::STATEPOINT` altogether. PlaceSafepoints generates `statepoint` wrappers with `id` set to `0xABCDEF00` (the old default value for the ID reported in the stackmap) and `num_patch_bytes` set to `0`. This can be made more sophisticated later. Reviewers: reames, pgavlin, swaroop.sridhar, AndyAyers Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D9546 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237214 91177308-0d34-0410-b5e6-96231b3b80d8
19 lines
1.0 KiB
LLVM
19 lines
1.0 KiB
LLVM
; RUN: not opt -S < %s -verify 2>&1 | FileCheck %s
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; CHECK: gc.statepoint: number of deoptimization arguments must be a constant integer
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declare void @use(...)
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declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(i32, i32, i32)
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declare i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(i32, i32, i32)
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declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
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declare i32 @"personality_function"()
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;; Basic usage
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define i64 addrspace(1)* @test1(i8 addrspace(1)* %arg, i32 %val) gc "statepoint-example" {
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entry:
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%cast = bitcast i8 addrspace(1)* %arg to i64 addrspace(1)*
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%safepoint_token = call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 %val, i32 0, i32 0, i32 0, i32 10, i32 0, i8 addrspace(1)* %arg, i64 addrspace(1)* %cast, i8 addrspace(1)* %arg, i8 addrspace(1)* %arg)
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%reloc = call i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(i32 %safepoint_token, i32 12, i32 13)
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ret i64 addrspace(1)* %reloc
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}
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