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clang-p2996/llvm/test/Transforms/RewriteStatepointsForGC/scalar-base-vector.ll
Philip Reames 587fa99cfd Default to generating statepoints with deopt and gc-transition bundles if needed 
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
2020-05-28 10:14:23 -07:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -rewrite-statepoints-for-gc -S | FileCheck %s
; RUN: opt < %s -passes=rewrite-statepoints-for-gc -S | FileCheck %s
declare void @do_safepoint()
declare i8 addrspace(1)* @def_ptr()
define i32 addrspace(1)* @test1(i8 addrspace(1)* %base1, <2 x i64> %offsets) gc "statepoint-example" {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 undef, label [[FIRST:%.*]], label [[SECOND:%.*]]
; CHECK: first:
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, i8 addrspace(1)* ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_p1i8f(i64 2882400000, i32 0, i8 addrspace(1)* ()* @def_ptr, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
; CHECK-NEXT: [[BASE21:%.*]] = call i8 addrspace(1)* @llvm.experimental.gc.result.p1i8(token [[STATEPOINT_TOKEN]])
; CHECK-NEXT: br label [[SECOND]]
; CHECK: second:
; CHECK-NEXT: [[PHI_BASE:%.*]] = phi i8 addrspace(1)* [ [[BASE1:%.*]], [[ENTRY:%.*]] ], [ [[BASE21]], [[FIRST]] ], !is_base_value !0
; CHECK-NEXT: [[PHI:%.*]] = phi i8 addrspace(1)* [ [[BASE1]], [[ENTRY]] ], [ [[BASE21]], [[FIRST]] ]
; CHECK-NEXT: [[BASE_I32:%.*]] = bitcast i8 addrspace(1)* [[PHI]] to i32 addrspace(1)*
; CHECK-NEXT: [[CAST:%.*]] = bitcast i8 addrspace(1)* [[PHI_BASE]] to i32 addrspace(1)*
; CHECK-NEXT: [[DOTSPLATINSERT_BASE:%.*]] = insertelement <2 x i32 addrspace(1)*> zeroinitializer, i32 addrspace(1)* [[CAST]], i32 0, !is_base_value !0
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <2 x i32 addrspace(1)*> undef, i32 addrspace(1)* [[BASE_I32]], i32 0
; CHECK-NEXT: [[DOTSPLAT_BASE:%.*]] = shufflevector <2 x i32 addrspace(1)*> [[DOTSPLATINSERT_BASE]], <2 x i32 addrspace(1)*> zeroinitializer, <2 x i32> zeroinitializer, !is_base_value !0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <2 x i32 addrspace(1)*> [[DOTSPLATINSERT]], <2 x i32 addrspace(1)*> undef, <2 x i32> zeroinitializer
; CHECK-NEXT: [[VEC:%.*]] = getelementptr i32, <2 x i32 addrspace(1)*> [[DOTSPLAT]], <2 x i64> [[OFFSETS:%.*]]
; CHECK-NEXT: [[PTR_BASE:%.*]] = extractelement <2 x i32 addrspace(1)*> [[DOTSPLAT_BASE]], i32 1, !is_base_value !0
; CHECK-NEXT: [[PTR:%.*]] = extractelement <2 x i32 addrspace(1)*> [[VEC]], i32 1
; CHECK-NEXT: [[STATEPOINT_TOKEN2:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* [[PTR]], i32 addrspace(1)* [[PTR_BASE]]) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
; CHECK-NEXT: [[PTR_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN2]], i32 8, i32 7)
; CHECK-NEXT: [[PTR_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[PTR_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: [[PTR_BASE_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN2]], i32 8, i32 8)
; CHECK-NEXT: [[PTR_BASE_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[PTR_BASE_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: ret i32 addrspace(1)* [[PTR_RELOCATED_CASTED]]
;
entry:
br i1 undef, label %first, label %second
first:
%base2 = call i8 addrspace(1)* @def_ptr() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
br label %second
second:
%phi = phi i8 addrspace(1)* [ %base1, %entry ], [ %base2, %first ]
%base.i32 = bitcast i8 addrspace(1)* %phi to i32 addrspace(1)*
%vec = getelementptr i32, i32 addrspace(1)* %base.i32, <2 x i64> %offsets
%ptr = extractelement <2 x i32 addrspace(1)*> %vec, i32 1
call void @do_safepoint() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
ret i32 addrspace(1)* %ptr
}
define i32 addrspace(1)* @test2(i8 addrspace(1)* %base, <2 x i64> %offsets) gc "statepoint-example" {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[BASE_I32:%.*]] = bitcast i8 addrspace(1)* [[BASE:%.*]] to i32 addrspace(1)*
; CHECK-NEXT: [[CAST:%.*]] = bitcast i8 addrspace(1)* [[BASE]] to i32 addrspace(1)*
; CHECK-NEXT: [[DOTSPLATINSERT_BASE:%.*]] = insertelement <2 x i32 addrspace(1)*> zeroinitializer, i32 addrspace(1)* [[CAST]], i32 0, !is_base_value !0
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <2 x i32 addrspace(1)*> undef, i32 addrspace(1)* [[BASE_I32]], i32 0
; CHECK-NEXT: [[DOTSPLAT_BASE:%.*]] = shufflevector <2 x i32 addrspace(1)*> [[DOTSPLATINSERT_BASE]], <2 x i32 addrspace(1)*> zeroinitializer, <2 x i32> zeroinitializer, !is_base_value !0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <2 x i32 addrspace(1)*> [[DOTSPLATINSERT]], <2 x i32 addrspace(1)*> undef, <2 x i32> zeroinitializer
; CHECK-NEXT: [[VEC:%.*]] = getelementptr i32, <2 x i32 addrspace(1)*> [[DOTSPLAT]], <2 x i64> [[OFFSETS:%.*]]
; CHECK-NEXT: [[PTR_BASE:%.*]] = extractelement <2 x i32 addrspace(1)*> [[DOTSPLAT_BASE]], i32 1, !is_base_value !0
; CHECK-NEXT: [[PTR:%.*]] = extractelement <2 x i32 addrspace(1)*> [[VEC]], i32 1
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* [[PTR]], i32 addrspace(1)* [[PTR_BASE]])
; CHECK-NEXT: [[PTR_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 8, i32 7)
; CHECK-NEXT: [[PTR_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[PTR_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: [[PTR_BASE_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 8, i32 8)
; CHECK-NEXT: [[PTR_BASE_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[PTR_BASE_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: ret i32 addrspace(1)* [[PTR_RELOCATED_CASTED]]
;
entry:
%base.i32 = bitcast i8 addrspace(1)* %base to i32 addrspace(1)*
%vec = getelementptr i32, i32 addrspace(1)* %base.i32, <2 x i64> %offsets
%ptr = extractelement <2 x i32 addrspace(1)*> %vec, i32 1
call void @do_safepoint()
ret i32 addrspace(1)* %ptr
}
define i32 addrspace(1)* @test3(<2 x i8 addrspace(1)*> %base, <2 x i64> %offsets) gc "statepoint-example" {
; CHECK-LABEL: @test3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[BASE_I32:%.*]] = bitcast <2 x i8 addrspace(1)*> [[BASE:%.*]] to <2 x i32 addrspace(1)*>
; CHECK-NEXT: [[VEC:%.*]] = getelementptr i32, <2 x i32 addrspace(1)*> [[BASE_I32]], <2 x i64> [[OFFSETS:%.*]]
; CHECK-NEXT: [[BASE_EE:%.*]] = extractelement <2 x i8 addrspace(1)*> [[BASE]], i32 1, !is_base_value !0
; CHECK-NEXT: [[PTR:%.*]] = extractelement <2 x i32 addrspace(1)*> [[VEC]], i32 1
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* [[PTR]], i8 addrspace(1)* [[BASE_EE]])
; CHECK-NEXT: [[PTR_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 8, i32 7)
; CHECK-NEXT: [[PTR_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[PTR_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: [[BASE_EE_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 8, i32 8)
; CHECK-NEXT: ret i32 addrspace(1)* [[PTR_RELOCATED_CASTED]]
;
entry:
%base.i32 = bitcast <2 x i8 addrspace(1)*> %base to <2 x i32 addrspace(1)*>
%vec = getelementptr i32, <2 x i32 addrspace(1)*> %base.i32, <2 x i64> %offsets
%ptr = extractelement <2 x i32 addrspace(1)*> %vec, i32 1
call void @do_safepoint()
ret i32 addrspace(1)* %ptr
}
define i32 addrspace(1)* @test4(i8 addrspace(1)* %base, <2 x i64> %offsets) gc "statepoint-example" {
; CHECK-LABEL: @test4(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[BASE_I32:%.*]] = bitcast i8 addrspace(1)* [[BASE:%.*]] to i32 addrspace(1)*
; CHECK-NEXT: [[CAST:%.*]] = bitcast i8 addrspace(1)* [[BASE]] to i32 addrspace(1)*
; CHECK-NEXT: [[DOTSPLATINSERT_BASE:%.*]] = insertelement <2 x i32 addrspace(1)*> zeroinitializer, i32 addrspace(1)* [[CAST]], i32 0, !is_base_value !0
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <2 x i32 addrspace(1)*> undef, i32 addrspace(1)* [[BASE_I32]], i32 0
; CHECK-NEXT: [[DOTSPLAT_BASE:%.*]] = shufflevector <2 x i32 addrspace(1)*> [[DOTSPLATINSERT_BASE]], <2 x i32 addrspace(1)*> zeroinitializer, <2 x i32> zeroinitializer, !is_base_value !0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <2 x i32 addrspace(1)*> [[DOTSPLATINSERT]], <2 x i32 addrspace(1)*> undef, <2 x i32> zeroinitializer
; CHECK-NEXT: [[VEC:%.*]] = getelementptr i32, <2 x i32 addrspace(1)*> [[DOTSPLAT]], <2 x i64> [[OFFSETS:%.*]]
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0, <2 x i32 addrspace(1)*> [[VEC]], <2 x i32 addrspace(1)*> [[DOTSPLAT_BASE]])
; CHECK-NEXT: [[VEC_RELOCATED:%.*]] = call coldcc <2 x i8 addrspace(1)*> @llvm.experimental.gc.relocate.v2p1i8(token [[STATEPOINT_TOKEN]], i32 8, i32 7)
; CHECK-NEXT: [[VEC_RELOCATED_CASTED:%.*]] = bitcast <2 x i8 addrspace(1)*> [[VEC_RELOCATED]] to <2 x i32 addrspace(1)*>
; CHECK-NEXT: [[DOTSPLAT_BASE_RELOCATED:%.*]] = call coldcc <2 x i8 addrspace(1)*> @llvm.experimental.gc.relocate.v2p1i8(token [[STATEPOINT_TOKEN]], i32 8, i32 8)
; CHECK-NEXT: [[DOTSPLAT_BASE_RELOCATED_CASTED:%.*]] = bitcast <2 x i8 addrspace(1)*> [[DOTSPLAT_BASE_RELOCATED]] to <2 x i32 addrspace(1)*>
; CHECK-NEXT: [[PTR:%.*]] = extractelement <2 x i32 addrspace(1)*> [[VEC_RELOCATED_CASTED]], i32 1
; CHECK-NEXT: ret i32 addrspace(1)* [[PTR]]
;
entry:
%base.i32 = bitcast i8 addrspace(1)* %base to i32 addrspace(1)*
%vec = getelementptr i32, i32 addrspace(1)* %base.i32, <2 x i64> %offsets
call void @do_safepoint()
%ptr = extractelement <2 x i32 addrspace(1)*> %vec, i32 1
ret i32 addrspace(1)* %ptr
}
define i32 addrspace(1)* @test5(<2 x i8 addrspace(1)*> %base, <2 x i64> %offsets) gc "statepoint-example" {
; CHECK-LABEL: @test5(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[BASE_I32:%.*]] = bitcast <2 x i8 addrspace(1)*> [[BASE:%.*]] to <2 x i32 addrspace(1)*>
; CHECK-NEXT: [[VEC:%.*]] = getelementptr i32, <2 x i32 addrspace(1)*> [[BASE_I32]], <2 x i64> [[OFFSETS:%.*]]
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 0, <2 x i8 addrspace(1)*> [[BASE]])
; CHECK-NEXT: [[BASE_RELOCATED:%.*]] = call coldcc <2 x i8 addrspace(1)*> @llvm.experimental.gc.relocate.v2p1i8(token [[STATEPOINT_TOKEN]], i32 7, i32 7)
; CHECK-NEXT: [[BASE_I32_REMAT:%.*]] = bitcast <2 x i8 addrspace(1)*> [[BASE_RELOCATED]] to <2 x i32 addrspace(1)*>
; CHECK-NEXT: [[VEC_REMAT:%.*]] = getelementptr i32, <2 x i32 addrspace(1)*> [[BASE_I32_REMAT]], <2 x i64> [[OFFSETS]]
; CHECK-NEXT: [[PTR:%.*]] = extractelement <2 x i32 addrspace(1)*> [[VEC_REMAT]], i32 0
; CHECK-NEXT: ret i32 addrspace(1)* [[PTR]]
;
entry:
%base.i32 = bitcast <2 x i8 addrspace(1)*> %base to <2 x i32 addrspace(1)*>
%vec = getelementptr i32, <2 x i32 addrspace(1)*> %base.i32, <2 x i64> %offsets
call void @do_safepoint()
%ptr = extractelement <2 x i32 addrspace(1)*> %vec, i32 0
ret i32 addrspace(1)* %ptr
}
define void @test6() gc "statepoint-example" {
; CHECK-LABEL: @test6(
; CHECK-NEXT: bb:
; CHECK-NEXT: br label [[HEADER:%.*]]
; CHECK: header:
; CHECK-NEXT: [[TMP_BASE:%.*]] = phi i8 addrspace(1)* [ [[TMP6_BASE:%.*]], [[LATCH:%.*]] ], [ null, [[BB:%.*]] ], !is_base_value !0
; CHECK-NEXT: [[TMP:%.*]] = phi i8 addrspace(1)* [ [[TMP6:%.*]], [[LATCH]] ], [ undef, [[BB]] ]
; CHECK-NEXT: br label [[BB10:%.*]]
; CHECK: bb10:
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @spam, i32 0, i32 0, i32 0, i32 0, i8 addrspace(1)* [[TMP]], i8 addrspace(1)* [[TMP_BASE]]) [ "deopt"(i8 addrspace(1)* [[TMP]]) ]
; CHECK-NEXT: [[TMP_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 8, i32 7)
; CHECK-NEXT: [[TMP_BASE_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 8, i32 8)
; CHECK-NEXT: br label [[BB25:%.*]]
; CHECK: bb25:
; CHECK-NEXT: [[STATEPOINT_TOKEN1:%.*]] = call token (i64, i32, <2 x i8 addrspace(1)*> ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_v2p1i8f(i64 2882400000, i32 0, <2 x i8 addrspace(1)*> ()* @baz, i32 0, i32 0, i32 0, i32 0)
; CHECK-NEXT: [[TMP262:%.*]] = call <2 x i8 addrspace(1)*> @llvm.experimental.gc.result.v2p1i8(token [[STATEPOINT_TOKEN1]])
; CHECK-NEXT: [[BASE_EE:%.*]] = extractelement <2 x i8 addrspace(1)*> [[TMP262]], i32 0, !is_base_value !0
; CHECK-NEXT: [[TMP27:%.*]] = extractelement <2 x i8 addrspace(1)*> [[TMP262]], i32 0
; CHECK-NEXT: br i1 undef, label [[BB7:%.*]], label [[LATCH]]
; CHECK: bb7:
; CHECK-NEXT: br label [[LATCH]]
; CHECK: latch:
; CHECK-NEXT: [[TMP6_BASE]] = phi i8 addrspace(1)* [ [[BASE_EE]], [[BB25]] ], [ [[BASE_EE]], [[BB7]] ], !is_base_value !0
; CHECK-NEXT: [[TMP6]] = phi i8 addrspace(1)* [ [[TMP27]], [[BB25]] ], [ [[TMP27]], [[BB7]] ]
; CHECK-NEXT: br label [[HEADER]]
;
bb:
br label %header
header: ; preds = %latch, %bb
%tmp = phi i8 addrspace(1)* [ %tmp6, %latch ], [ undef, %bb ]
br label %bb10
bb10: ; preds = %bb2
call void @spam() [ "deopt"(i8 addrspace(1)* %tmp) ]
br label %bb25
bb25: ; preds = %bb24
%tmp26 = call <2 x i8 addrspace(1)*> @baz()
%tmp27 = extractelement <2 x i8 addrspace(1)*> %tmp26, i32 0
br i1 undef, label %bb7, label %latch
bb7: ; preds = %bb25
br label %latch
latch: ; preds = %bb25, %bb7
%tmp6 = phi i8 addrspace(1)* [ %tmp27, %bb25 ], [ %tmp27, %bb7 ]
br label %header
}
declare void @spam()
declare <2 x i8 addrspace(1)*> @baz()
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