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546a9c07c3
Continues from D80598. The key point of the change is to default to using operand bundles instead of the inline length prefix argument lists for statepoint nodes. An important subtlety to note is that the presence of a bundle has semantic meaning, even if it is empty. As such, we need to make a somewhat deeper change to the interface than is first obvious. Existing code treats statepoint deopt arguments and the deopt bundle operands differently during inlining. The former is ignored (resulting in caller state being dropped), the later is merged. We can't preserve the old behaviour for calls with deopt fed to RS4GC and then inlining, but we can avoid the no-deopt case changing. At least in internal testing, that seem to be the important one. (I'd argue the "stop merging after RS4GC" behaviour for the former was always "unexpected", but that the behaviour for non-deopt calls actually make sense.) Differential Revision: https://reviews.llvm.org/D80674
43 lines
1.9 KiB
LLVM
43 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -rewrite-statepoints-for-gc -S < %s | FileCheck %s
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; RUN: opt -passes=rewrite-statepoints-for-gc -S < %s | FileCheck %s
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; Check that the "deopt-lowering" function attribute gets transcoded into
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; flags on the resulting statepoint
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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declare void @foo()
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declare void @bar() "deopt-lowering"="live-in"
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declare void @baz() "deopt-lowering"="live-through"
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define void @test1() gc "statepoint-example" {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 57) ]
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; CHECK-NEXT: [[STATEPOINT_TOKEN1:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 0) [ "deopt"(i32 42) ]
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; CHECK-NEXT: [[STATEPOINT_TOKEN2:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @baz, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 13) ]
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; CHECK-NEXT: ret void
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;
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entry:
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call void @foo() [ "deopt"(i32 57) ]
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call void @bar() [ "deopt"(i32 42) ]
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call void @baz() [ "deopt"(i32 13) ]
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ret void
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}
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; add deopt-lowering attribute as part of callsite
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define void @test2() gc "statepoint-example" {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @foo, i32 0, i32 2, i32 0, i32 0) #0 [ "deopt"(i32 57) ]
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; CHECK-NEXT: ret void
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;
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entry:
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call void @foo() "deopt-lowering"="live-in" [ "deopt"(i32 57) ]
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ret void
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}
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