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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=rewrite-statepoints-for-gc -S 2>&1 | FileCheck %s3 4declare ptr addrspace(1) @generate_obj() "gc-leaf-function"5 6declare void @use_obj(ptr addrspace(1)) "gc-leaf-function"7 8; The rewriting needs to make %obj loop variant by inserting a phi9; of the original value and it's relocation.10define void @test() gc "statepoint-example" {11; CHECK-LABEL: @test(12; CHECK-NEXT: entry:13; CHECK-NEXT: [[OBJ:%.*]] = call ptr addrspace(1) @generate_obj()14; CHECK-NEXT: br label [[LOOP:%.*]]15; CHECK: loop:16; CHECK-NEXT: [[DOT0:%.*]] = phi ptr addrspace(1) [ [[OBJ]], [[ENTRY:%.*]] ], [ [[OBJ_RELOCATED:%.*]], [[LOOP]] ]17; CHECK-NEXT: call void @use_obj(ptr addrspace(1) [[DOT0]])18; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @do_safepoint, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[DOT0]]) ]19; CHECK-NEXT: [[OBJ_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0)20; CHECK-NEXT: br label [[LOOP]]21;22entry:23 %obj = call ptr addrspace(1) @generate_obj()24 br label %loop25 26loop:27 call void @use_obj(ptr addrspace(1) %obj)28 call void @do_safepoint() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]29 br label %loop30}31 32declare void @do_safepoint()33 34declare void @parse_point(ptr addrspace(1))35 36define ptr addrspace(1) @test1(i32 %caller, ptr addrspace(1) %a, ptr addrspace(1) %b, i32 %unknown, i1 %c) gc "statepoint-example" {37; CHECK-LABEL: @test1(38; CHECK-NEXT: entry:39; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]40; CHECK: left:41; CHECK-NEXT: switch i32 [[UNKNOWN:%.*]], label [[RIGHT]] [42; CHECK-NEXT: i32 0, label [[MERGE:%.*]]43; CHECK-NEXT: i32 1, label [[MERGE]]44; CHECK-NEXT: i32 5, label [[MERGE]]45; CHECK-NEXT: ]46; CHECK: right:47; CHECK-NEXT: br label [[MERGE]]48; CHECK: merge:49; CHECK-NEXT: [[VALUE:%.*]] = phi ptr addrspace(1) [ [[A:%.*]], [[LEFT]] ], [ [[A]], [[LEFT]] ], [ [[A]], [[LEFT]] ], [ [[B:%.*]], [[RIGHT]] ]50; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void (ptr addrspace(1))) @parse_point, i32 1, i32 0, ptr addrspace(1) [[VALUE]], i32 0, i32 0) [ "deopt"(i32 0, i32 0, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[VALUE]]) ]51; CHECK-NEXT: [[VALUE_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0)52; CHECK-NEXT: ret ptr addrspace(1) [[VALUE_RELOCATED]]53;54entry:55 br i1 %c, label %left, label %right56 57left:58; Our safepoint placement pass calls removeUnreachableBlocks, which does a bunch59; of simplifications to branch instructions. This bug is visible only when60; there are multiple branches into the same block from the same predecessor, and61; the following ceremony is to make that artefact survive a call to62; removeUnreachableBlocks. As an example, "br i1 undef, label %merge, label %merge"63; will get simplified to "br label %merge" by removeUnreachableBlocks.64 switch i32 %unknown, label %right [65 i32 0, label %merge66 i32 1, label %merge67 i32 5, label %merge68 i32 3, label %right69 ]70 71right:72 br label %merge73 74merge:75 %value = phi ptr addrspace(1) [ %a, %left ], [ %a, %left ], [ %a, %left ], [ %b, %right ]76 call void @parse_point(ptr addrspace(1) %value) [ "deopt"(i32 0, i32 0, i32 0, i32 0, i32 0) ]77 ret ptr addrspace(1) %value78}79 80;; The purpose of this test is to ensure that when two live values share a81;; base defining value with inherent conflicts, we end up with a *single*82;; base phi/select per such node. This is testing an optimization, not a83;; fundemental correctness criteria84define void @test2(i1 %cnd, ptr addrspace(1) %base_obj, ptr addrspace(1) %base_arg2) gc "statepoint-example" {85; CHECK-LABEL: @test2(86; CHECK-NEXT: entry:87; CHECK-NEXT: [[OBJ:%.*]] = getelementptr i64, ptr addrspace(1) [[BASE_OBJ:%.*]], i32 188; CHECK-NEXT: br label [[LOOP:%.*]]89; CHECK: loop:90; CHECK-NEXT: [[DOT0:%.*]] = phi ptr addrspace(1) [ [[BASE_ARG2:%.*]], [[ENTRY:%.*]] ], [ [[BASE_ARG2_RELOCATED:%.*]], [[LOOP]] ]91; CHECK-NEXT: [[CURRENT_BASE:%.*]] = phi ptr addrspace(1) [ [[BASE_OBJ]], [[ENTRY]] ], [ [[NEXT_BASE_RELOCATED:%.*]], [[LOOP]] ], !is_base_value !092; CHECK-NEXT: [[CURRENT:%.*]] = phi ptr addrspace(1) [ [[OBJ]], [[ENTRY]] ], [ [[NEXT_RELOCATED:%.*]], [[LOOP]] ]93; CHECK-NEXT: [[EXTRA:%.*]] = phi ptr addrspace(1) [ [[OBJ]], [[ENTRY]] ], [ [[EXTRA2_RELOCATED:%.*]], [[LOOP]] ]94; CHECK-NEXT: [[NEXTA:%.*]] = getelementptr i64, ptr addrspace(1) [[CURRENT]], i32 195; CHECK-NEXT: [[NEXT_BASE:%.*]] = select i1 [[CND:%.*]], ptr addrspace(1) [[CURRENT_BASE]], ptr addrspace(1) [[DOT0]], !is_base_value !096; CHECK-NEXT: [[NEXT:%.*]] = select i1 [[CND]], ptr addrspace(1) [[NEXTA]], ptr addrspace(1) [[DOT0]]97; CHECK-NEXT: [[EXTRA2_BASE:%.*]] = select i1 [[CND]], ptr addrspace(1) [[CURRENT_BASE]], ptr addrspace(1) [[DOT0]], !is_base_value !098; CHECK-NEXT: [[EXTRA2:%.*]] = select i1 [[CND]], ptr addrspace(1) [[NEXTA]], ptr addrspace(1) [[DOT0]]99; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[NEXT_BASE]], ptr addrspace(1) [[NEXT]], ptr addrspace(1) [[EXTRA2]], ptr addrspace(1) [[DOT0]], ptr addrspace(1) [[EXTRA2_BASE]]) ]100; CHECK-NEXT: [[NEXT_BASE_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0)101; CHECK-NEXT: [[NEXT_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 1)102; CHECK-NEXT: [[EXTRA2_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 4, i32 2)103; CHECK-NEXT: [[BASE_ARG2_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 3, i32 3)104; CHECK-NEXT: [[EXTRA2_BASE_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 4, i32 4)105; CHECK-NEXT: br label [[LOOP]]106;107entry:108 %obj = getelementptr i64, ptr addrspace(1) %base_obj, i32 1109 br label %loop110 111; Given the two selects are equivelent, so are their base phis - ideally,112; we'd have commoned these, but that's a missed optimization, not correctness.113;; Both 'next' and 'extra2' are live across the backedge safepoint...114 115loop:116 %current = phi ptr addrspace(1) [ %obj, %entry ], [ %next, %loop ]117 %extra = phi ptr addrspace(1) [ %obj, %entry ], [ %extra2, %loop ]118 %nexta = getelementptr i64, ptr addrspace(1) %current, i32 1119 %next = select i1 %cnd, ptr addrspace(1) %nexta, ptr addrspace(1) %base_arg2120 %extra2 = select i1 %cnd, ptr addrspace(1) %nexta, ptr addrspace(1) %base_arg2121 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]122 br label %loop123}124 125define ptr addrspace(1) @test3(i1 %cnd, ptr addrspace(1) %obj, ptr addrspace(1) %obj2) gc "statepoint-example" {126; CHECK-LABEL: @test3(127; CHECK-NEXT: entry:128; CHECK-NEXT: br i1 [[CND:%.*]], label [[MERGE:%.*]], label [[TAKEN:%.*]]129; CHECK: taken:130; CHECK-NEXT: br label [[MERGE]]131; CHECK: merge:132; CHECK-NEXT: [[BDV:%.*]] = phi ptr addrspace(1) [ [[OBJ:%.*]], [[ENTRY:%.*]] ], [ [[OBJ2:%.*]], [[TAKEN]] ]133; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[BDV]]) ]134; CHECK-NEXT: [[BDV_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0)135; CHECK-NEXT: ret ptr addrspace(1) [[BDV_RELOCATED]]136;137entry:138 br i1 %cnd, label %merge, label %taken139 140taken:141 br label %merge142 143merge:144 %bdv = phi ptr addrspace(1) [ %obj, %entry ], [ %obj2, %taken ]145 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]146 ret ptr addrspace(1) %bdv147}148 149define ptr addrspace(1) @test4(i1 %cnd, ptr addrspace(1) %obj, ptr addrspace(1) %obj2) gc "statepoint-example" {150; CHECK-LABEL: @test4(151; CHECK-NEXT: entry:152; CHECK-NEXT: br i1 [[CND:%.*]], label [[MERGE:%.*]], label [[TAKEN:%.*]]153; CHECK: taken:154; CHECK-NEXT: br label [[MERGE]]155; CHECK: merge:156; CHECK-NEXT: [[BDV:%.*]] = phi ptr addrspace(1) [ [[OBJ:%.*]], [[ENTRY:%.*]] ], [ [[OBJ]], [[TAKEN]] ]157; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[BDV]]) ]158; CHECK-NEXT: [[BDV_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0)159; CHECK-NEXT: ret ptr addrspace(1) [[BDV_RELOCATED]]160;161entry:162 br i1 %cnd, label %merge, label %taken163 164taken:165 br label %merge166 167merge:168 %bdv = phi ptr addrspace(1) [ %obj, %entry ], [ %obj, %taken ]169 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]170 ret ptr addrspace(1) %bdv171}172 173define ptr addrspace(1) @test5(i1 %cnd, ptr addrspace(1) %obj, ptr addrspace(1) %obj2) gc "statepoint-example" {174; CHECK-LABEL: @test5(175; CHECK-NEXT: entry:176; CHECK-NEXT: br label [[MERGE:%.*]]177; CHECK: merge:178; CHECK-NEXT: [[BDV:%.*]] = phi ptr addrspace(1) [ [[OBJ:%.*]], [[ENTRY:%.*]] ], [ [[OBJ2:%.*]], [[MERGE]] ]179; CHECK-NEXT: br i1 [[CND:%.*]], label [[MERGE]], label [[NEXT:%.*]]180; CHECK: next:181; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[BDV]]) ]182; CHECK-NEXT: [[BDV_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0)183; CHECK-NEXT: ret ptr addrspace(1) [[BDV_RELOCATED]]184;185entry:186 br label %merge187 188merge:189 %bdv = phi ptr addrspace(1) [ %obj, %entry ], [ %obj2, %merge ]190 br i1 %cnd, label %merge, label %next191 192next:193 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]194 ret ptr addrspace(1) %bdv195}196 197; We know from the deopt use that %bdv must be a base value, and as198; result can avoid materializing the extra copy of the BDV phi node.199; (Even without a general forward analysis)200define ptr addrspace(1) @test6(i1 %cnd, ptr addrspace(1) %obj, ptr addrspace(1) %obj2) gc "statepoint-example" {201; CHECK-LABEL: @test6(202; CHECK-NEXT: entry:203; CHECK-NEXT: br label [[MERGE:%.*]]204; CHECK: merge:205; CHECK-NEXT: [[BDV:%.*]] = phi ptr addrspace(1) [ [[OBJ:%.*]], [[ENTRY:%.*]] ], [ [[OBJ2:%.*]], [[MERGE]] ]206; CHECK-NEXT: br i1 [[CND:%.*]], label [[MERGE]], label [[NEXT:%.*]]207; CHECK: next:208; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(ptr addrspace(1) [[BDV]]), "gc-live"(ptr addrspace(1) [[BDV]]) ]209; CHECK-NEXT: [[BDV_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0)210; CHECK-NEXT: ret ptr addrspace(1) [[BDV_RELOCATED]]211;212entry:213 br label %merge214 215merge:216 %bdv = phi ptr addrspace(1) [ %obj, %entry ], [ %obj2, %merge ]217 br i1 %cnd, label %merge, label %next218 219next:220 call void @foo() [ "deopt"(ptr addrspace(1) %bdv) ]221 ret ptr addrspace(1) %bdv222}223 224declare i32 @snork()225 226define void @test7() gc "statepoint-example" {227; CHECK-LABEL: @test7(228; CHECK-NEXT: bb:229; CHECK-NEXT: [[GETELEMENTPTR:%.*]] = getelementptr i8, <2 x ptr addrspace(1)> zeroinitializer, <2 x i64> <i64 888, i64 908>230; CHECK-NEXT: [[SHUFFLEVECTOR_BASE:%.*]] = shufflevector <2 x ptr addrspace(1)> zeroinitializer, <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3>, !is_base_value !0231; CHECK-NEXT: [[SHUFFLEVECTOR:%.*]] = shufflevector <2 x ptr addrspace(1)> [[GETELEMENTPTR]], <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3>232; CHECK-NEXT: [[SHUFFLEVECTOR1_BASE:%.*]] = shufflevector <2 x ptr addrspace(1)> zeroinitializer, <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3>, !is_base_value !0233; CHECK-NEXT: [[SHUFFLEVECTOR1:%.*]] = shufflevector <2 x ptr addrspace(1)> [[GETELEMENTPTR]], <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3>234; CHECK-NEXT: [[SELECT_BASE:%.*]] = select i1 false, <4 x ptr addrspace(1)> [[SHUFFLEVECTOR1_BASE]], <4 x ptr addrspace(1)> [[SHUFFLEVECTOR_BASE]], !is_base_value !0235; CHECK-NEXT: [[SELECT:%.*]] = select i1 false, <4 x ptr addrspace(1)> [[SHUFFLEVECTOR1]], <4 x ptr addrspace(1)> [[SHUFFLEVECTOR]]236; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(i32 ()) @snork, i32 0, i32 0, i32 0, i32 0) [ "gc-live"(<4 x ptr addrspace(1)> [[SELECT]], <4 x ptr addrspace(1)> [[SELECT_BASE]]) ]237; CHECK-NEXT: [[SELECT_RELOCATED:%.*]] = call coldcc <4 x ptr addrspace(1)> @llvm.experimental.gc.relocate.v4p1(token [[STATEPOINT_TOKEN]], i32 1, i32 0)238; CHECK-NEXT: [[SELECT_BASE_RELOCATED:%.*]] = call coldcc <4 x ptr addrspace(1)> @llvm.experimental.gc.relocate.v4p1(token [[STATEPOINT_TOKEN]], i32 1, i32 1)239; CHECK-NEXT: [[EXTRACTELEMENT:%.*]] = extractelement <4 x ptr addrspace(1)> [[SELECT_RELOCATED]], i32 0240; CHECK-NEXT: ret void241;242bb:243 %getelementptr = getelementptr i8, <2 x ptr addrspace(1)> zeroinitializer, <2 x i64> <i64 888, i64 908>244 %shufflevector = shufflevector <2 x ptr addrspace(1)> %getelementptr, <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3>245 %shufflevector1 = shufflevector <2 x ptr addrspace(1)> %getelementptr, <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3>246 %select = select i1 false, <4 x ptr addrspace(1)> %shufflevector1, <4 x ptr addrspace(1)> %shufflevector247 %call = call i32 @snork()248 %extractelement = extractelement <4 x ptr addrspace(1)> %select, i32 0249 ret void250}251 252declare void @foo()253