[llvm] af852d6 - Revert "Process gep (phi ptr1, ptr2) in SROA"
Stanislav Mekhanoshin via llvm-commits
llvm-commits at lists.llvm.org
Fri May 29 13:51:14 PDT 2020
Author: Stanislav Mekhanoshin
Date: 2020-05-29T13:51:03-07:00
New Revision: af852d6f3638fead78af9048503a67cf7b308eb6
URL: https://github.com/llvm/llvm-project/commit/af852d6f3638fead78af9048503a67cf7b308eb6
DIFF: https://github.com/llvm/llvm-project/commit/af852d6f3638fead78af9048503a67cf7b308eb6.diff
LOG: Revert "Process gep (phi ptr1, ptr2) in SROA"
This reverts commit f66a43c11a7899d5c578b80d7f154abcea3b8d8e.
Added:
Modified:
llvm/lib/Transforms/Scalar/SROA.cpp
Removed:
llvm/test/Transforms/SROA/phi-gep.ll
################################################################################
diff --git a/llvm/lib/Transforms/Scalar/SROA.cpp b/llvm/lib/Transforms/Scalar/SROA.cpp
index 0440805d484a..1d486a3e74fd 100644
--- a/llvm/lib/Transforms/Scalar/SROA.cpp
+++ b/llvm/lib/Transforms/Scalar/SROA.cpp
@@ -3488,62 +3488,11 @@ class AggLoadStoreRewriter : public InstVisitor<AggLoadStoreRewriter, bool> {
return true;
}
- // Fold gep (phi ptr1, ptr2) => phi gep(ptr1), gep(ptr2)
- bool foldGEPPhi(GetElementPtrInst &GEPI) {
- if (!GEPI.hasAllConstantIndices())
- return false;
-
- PHINode *PHI = cast<PHINode>(GEPI.getPointerOperand());
- if (llvm::any_of(PHI->incoming_values(), [](Value *In)
- { Instruction *I = dyn_cast<Instruction>(In);
- return !I || isa<GetElementPtrInst>(I) || isa<PHINode>(I) ||
- !I->getParent()->isLegalToHoistInto();
- }))
- return false;
-
- LLVM_DEBUG(dbgs() << " Rewriting gep(phi) -> phi(gep):"
- << "\n original: " << *PHI
- << "\n " << GEPI
- << "\n to: ");
-
- SmallVector<Value *, 4> Index(GEPI.idx_begin(), GEPI.idx_end());
- bool IsInBounds = GEPI.isInBounds();
- IRBuilderTy PHIBuilder(GEPI.getParent()->getFirstNonPHI());
- PHINode *NewPN = PHIBuilder.CreatePHI(GEPI.getType(),
- PHI->getNumIncomingValues(),
- PHI->getName() + ".sroa.phi");
- for (unsigned I = 0, E = PHI->getNumIncomingValues(); I != E; ++I) {
- Instruction *In = cast<Instruction>(PHI->getIncomingValue(I));
-
- IRBuilderTy B(In->getParent(), std::next(In->getIterator()));
- Value *NewVal = IsInBounds
- ? B.CreateInBoundsGEP(In, Index, In->getName() + ".sroa.gep")
- : B.CreateGEP(In, Index, In->getName() + ".sroa.gep");
- NewPN->addIncoming(NewVal, PHI->getIncomingBlock(I));
- if (auto *I = dyn_cast<Instruction>(NewVal)) {
- visit(I);
- }
- }
-
- GEPI.replaceAllUsesWith(NewPN);
- GEPI.eraseFromParent();
-
- LLVM_DEBUG(for (Value *In : NewPN->incoming_values())
- dbgs() << "\n " << *In;
- dbgs() << "\n " << *NewPN << '\n');
-
- return true;
- }
-
bool visitGetElementPtrInst(GetElementPtrInst &GEPI) {
if (isa<SelectInst>(GEPI.getPointerOperand()) &&
foldGEPSelect(GEPI))
return true;
- if (isa<PHINode>(GEPI.getPointerOperand()) &&
- foldGEPPhi(GEPI))
- return true;
-
enqueueUsers(GEPI);
return false;
}
diff --git a/llvm/test/Transforms/SROA/phi-gep.ll b/llvm/test/Transforms/SROA/phi-gep.ll
deleted file mode 100644
index 72d07ed84a65..000000000000
--- a/llvm/test/Transforms/SROA/phi-gep.ll
+++ /dev/null
@@ -1,364 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -S -sroa < %s | FileCheck %s
-
-%pair = type { i32, i32 }
-
-define i32 @test_sroa_phi_gep(i1 %cond) {
-; CHECK-LABEL: @test_sroa_phi_gep(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[END:%.*]]
-; CHECK: if.then:
-; CHECK-NEXT: br label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI_SROA_PHI_SROA_SPECULATED:%.*]] = phi i32 [ 1, [[ENTRY:%.*]] ], [ 2, [[IF_THEN]] ]
-; CHECK-NEXT: ret i32 [[PHI_SROA_PHI_SROA_SPECULATED]]
-;
-entry:
- %a = alloca %pair, align 4
- %b = alloca %pair, align 4
- %gep_a = getelementptr inbounds %pair, %pair* %a, i32 0, i32 1
- %gep_b = getelementptr inbounds %pair, %pair* %b, i32 0, i32 1
- store i32 1, i32* %gep_a, align 4
- store i32 2, i32* %gep_b, align 4
- br i1 %cond, label %if.then, label %end
-
-if.then:
- br label %end
-
-end:
- %phi = phi %pair* [ %a, %entry], [ %b, %if.then ]
- %gep = getelementptr inbounds %pair, %pair* %phi, i32 0, i32 1
- %load = load i32, i32* %gep, align 4
- ret i32 %load
-}
-
-define i32 @test_sroa_phi_gep_non_inbound(i1 %cond) {
-; CHECK-LABEL: @test_sroa_phi_gep_non_inbound(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[END:%.*]]
-; CHECK: if.then:
-; CHECK-NEXT: br label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI_SROA_PHI_SROA_SPECULATED:%.*]] = phi i32 [ 1, [[ENTRY:%.*]] ], [ 2, [[IF_THEN]] ]
-; CHECK-NEXT: ret i32 [[PHI_SROA_PHI_SROA_SPECULATED]]
-;
-entry:
- %a = alloca %pair, align 4
- %b = alloca %pair, align 4
- %gep_a = getelementptr %pair, %pair* %a, i32 0, i32 1
- %gep_b = getelementptr %pair, %pair* %b, i32 0, i32 1
- store i32 1, i32* %gep_a, align 4
- store i32 2, i32* %gep_b, align 4
- br i1 %cond, label %if.then, label %end
-
-if.then:
- br label %end
-
-end:
- %phi = phi %pair* [ %a, %entry], [ %b, %if.then ]
- %gep = getelementptr %pair, %pair* %phi, i32 0, i32 1
- %load = load i32, i32* %gep, align 4
- ret i32 %load
-}
-
-define i32 @test_sroa_phi_gep_undef(i1 %cond) {
-; CHECK-LABEL: @test_sroa_phi_gep_undef(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[A:%.*]] = alloca [[PAIR:%.*]], align 4
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[END:%.*]]
-; CHECK: if.then:
-; CHECK-NEXT: br label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI:%.*]] = phi %pair* [ [[A]], [[ENTRY:%.*]] ], [ undef, [[IF_THEN]] ]
-; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[PHI]], i32 0, i32 1
-; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[GEP]], align 4
-; CHECK-NEXT: ret i32 [[LOAD]]
-;
-entry:
- %a = alloca %pair, align 4
- br i1 %cond, label %if.then, label %end
-
-if.then:
- br label %end
-
-end:
- %phi = phi %pair* [ %a, %entry], [ undef, %if.then ]
- %gep = getelementptr inbounds %pair, %pair* %phi, i32 0, i32 1
- %load = load i32, i32* %gep, align 4
- ret i32 %load
-}
-
- at g = global %pair zeroinitializer, align 4
-
-define i32 @test_sroa_phi_gep_global(i1 %cond) {
-; CHECK-LABEL: @test_sroa_phi_gep_global(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[A:%.*]] = alloca [[PAIR:%.*]], align 4
-; CHECK-NEXT: [[GEP_A:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[A]], i32 0, i32 1
-; CHECK-NEXT: store i32 1, i32* [[GEP_A]], align 4
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[END:%.*]]
-; CHECK: if.then:
-; CHECK-NEXT: br label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI:%.*]] = phi %pair* [ [[A]], [[ENTRY:%.*]] ], [ @g, [[IF_THEN]] ]
-; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[PHI]], i32 0, i32 1
-; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[GEP]], align 4
-; CHECK-NEXT: ret i32 [[LOAD]]
-;
-entry:
- %a = alloca %pair, align 4
- %gep_a = getelementptr inbounds %pair, %pair* %a, i32 0, i32 1
- store i32 1, i32* %gep_a, align 4
- br i1 %cond, label %if.then, label %end
-
-if.then:
- br label %end
-
-end:
- %phi = phi %pair* [ %a, %entry], [ @g, %if.then ]
- %gep = getelementptr inbounds %pair, %pair* %phi, i32 0, i32 1
- %load = load i32, i32* %gep, align 4
- ret i32 %load
-}
-
-define i32 @test_sroa_phi_gep_arg_phi_inspt(i1 %cond) {
-; CHECK-LABEL: @test_sroa_phi_gep_arg_phi_inspt(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[FOR:%.*]], label [[END:%.*]]
-; CHECK: for:
-; CHECK-NEXT: [[PHI_INSPT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I:%.*]], [[FOR]] ]
-; CHECK-NEXT: [[I]] = add i32 [[PHI_INSPT]], 1
-; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ult i32 [[I]], 10
-; CHECK-NEXT: br i1 [[LOOP_COND]], label [[FOR]], label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI_SROA_PHI_SROA_SPECULATED:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ 2, [[FOR]] ]
-; CHECK-NEXT: ret i32 [[PHI_SROA_PHI_SROA_SPECULATED]]
-;
-entry:
- %a = alloca %pair, align 4
- %b = alloca %pair, align 4
- %gep_a = getelementptr inbounds %pair, %pair* %a, i32 0, i32 1
- %gep_b = getelementptr inbounds %pair, %pair* %b, i32 0, i32 1
- store i32 1, i32* %gep_a, align 4
- store i32 2, i32* %gep_b, align 4
- br i1 %cond, label %for, label %end
-
-for:
- %phi_inspt = phi i32 [ 0, %entry ], [ %i, %for ]
- %i = add i32 %phi_inspt, 1
- %loop.cond = icmp ult i32 %i, 10
- br i1 %loop.cond, label %for, label %end
-
-end:
- %phi = phi %pair* [ %a, %entry], [ %b, %for ]
- %gep = getelementptr inbounds %pair, %pair* %phi, i32 0, i32 1
- %load = load i32, i32* %gep, align 4
- ret i32 %load
-}
-
-define i32 @test_sroa_phi_gep_phi_inspt(i1 %cond) {
-; CHECK-LABEL: @test_sroa_phi_gep_phi_inspt(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[A:%.*]] = alloca [[PAIR:%.*]], align 4
-; CHECK-NEXT: [[B:%.*]] = alloca [[PAIR]], align 4
-; CHECK-NEXT: [[GEP_A:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[A]], i32 0, i32 1
-; CHECK-NEXT: [[GEP_B:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[B]], i32 0, i32 1
-; CHECK-NEXT: store i32 1, i32* [[GEP_A]], align 4
-; CHECK-NEXT: store i32 2, i32* [[GEP_B]], align 4
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[FOR:%.*]], label [[END:%.*]]
-; CHECK: for:
-; CHECK-NEXT: [[PHI_IN:%.*]] = phi %pair* [ null, [[ENTRY:%.*]] ], [ [[B]], [[FOR]] ]
-; CHECK-NEXT: [[PHI_INSPT:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[I:%.*]], [[FOR]] ]
-; CHECK-NEXT: [[I]] = add i32 [[PHI_INSPT]], 1
-; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ult i32 [[I]], 10
-; CHECK-NEXT: br i1 [[LOOP_COND]], label [[FOR]], label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI:%.*]] = phi %pair* [ [[A]], [[ENTRY]] ], [ [[PHI_IN]], [[FOR]] ]
-; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[PHI]], i32 0, i32 1
-; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[GEP]], align 4
-; CHECK-NEXT: ret i32 [[LOAD]]
-;
-entry:
- %a = alloca %pair, align 4
- %b = alloca %pair, align 4
- %gep_a = getelementptr inbounds %pair, %pair* %a, i32 0, i32 1
- %gep_b = getelementptr inbounds %pair, %pair* %b, i32 0, i32 1
- store i32 1, i32* %gep_a, align 4
- store i32 2, i32* %gep_b, align 4
- br i1 %cond, label %for, label %end
-
-for:
- %phi_in = phi %pair * [ null, %entry ], [ %b, %for ]
- %phi_inspt = phi i32 [ 0, %entry ], [ %i, %for ]
- %i = add i32 %phi_inspt, 1
- %loop.cond = icmp ult i32 %i, 10
- br i1 %loop.cond, label %for, label %end
-
-end:
- %phi = phi %pair* [ %a, %entry], [ %phi_in, %for ]
- %gep = getelementptr inbounds %pair, %pair* %phi, i32 0, i32 1
- %load = load i32, i32* %gep, align 4
- ret i32 %load
-}
-
-define i32 @test_sroa_gep_phi_gep(i1 %cond) {
-; CHECK-LABEL: @test_sroa_gep_phi_gep(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[A_SROA_0:%.*]] = alloca i32, align 4
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[FOR:%.*]], label [[END:%.*]]
-; CHECK: for:
-; CHECK-NEXT: [[PHI_I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I:%.*]], [[FOR]] ]
-; CHECK-NEXT: [[PHI:%.*]] = phi i32* [ [[A_SROA_0]], [[ENTRY]] ], [ [[GEP_FOR:%.*]], [[FOR]] ]
-; CHECK-NEXT: [[I]] = add i32 [[PHI_I]], 1
-; CHECK-NEXT: [[GEP_FOR]] = getelementptr inbounds i32, i32* [[PHI]], i32 0
-; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ult i32 [[I]], 10
-; CHECK-NEXT: br i1 [[LOOP_COND]], label [[FOR]], label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI_END:%.*]] = phi i32* [ [[A_SROA_0]], [[ENTRY]] ], [ [[PHI]], [[FOR]] ]
-; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[PHI_END]], align 4
-; CHECK-NEXT: ret i32 [[LOAD]]
-;
-entry:
- %a = alloca %pair, align 4
- %gep_a = getelementptr inbounds %pair, %pair* %a, i32 0, i32 1
- br i1 %cond, label %for, label %end
-
-for:
- %phi_i = phi i32 [ 0, %entry ], [ %i, %for ]
- %phi = phi i32* [ %gep_a, %entry], [ %gep_for, %for ]
- %i = add i32 %phi_i, 1
- %gep_for = getelementptr inbounds i32, i32* %phi, i32 0
- %loop.cond = icmp ult i32 %i, 10
- br i1 %loop.cond, label %for, label %end
-
-end:
- %phi_end = phi i32* [ %gep_a, %entry], [ %phi, %for ]
- %load = load i32, i32* %phi_end, align 4
- ret i32 %load
-}
-
-define i32 @test_sroa_gep_cast_phi_gep(i1 %cond) {
-; CHECK-LABEL: @test_sroa_gep_cast_phi_gep(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[A_SROA_0:%.*]] = alloca i32, align 4
-; CHECK-NEXT: [[A_SROA_0_0_GEP_A_1_SROA_CAST:%.*]] = bitcast i32* [[A_SROA_0]] to float*
-; CHECK-NEXT: [[A_SROA_0_0_GEP_A_1_SROA_CAST2:%.*]] = bitcast i32* [[A_SROA_0]] to float*
-; CHECK-NEXT: [[A_SROA_0_0_GEP_SROA_CAST:%.*]] = bitcast i32* [[A_SROA_0]] to float*
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[FOR:%.*]], label [[END:%.*]]
-; CHECK: for:
-; CHECK-NEXT: [[PHI_I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I:%.*]], [[FOR]] ]
-; CHECK-NEXT: [[PHI:%.*]] = phi float* [ [[A_SROA_0_0_GEP_A_1_SROA_CAST]], [[ENTRY]] ], [ [[GEP_FOR_2:%.*]], [[FOR]] ]
-; CHECK-NEXT: [[PHI_SROA_PHI:%.*]] = phi float* [ [[A_SROA_0_0_GEP_SROA_CAST]], [[ENTRY]] ], [ [[GEP_FOR_2_SROA_GEP:%.*]], [[FOR]] ]
-; CHECK-NEXT: [[I]] = add i32 [[PHI_I]], 1
-; CHECK-NEXT: [[GEP_FOR_1:%.*]] = bitcast float* [[PHI_SROA_PHI]] to i32*
-; CHECK-NEXT: [[GEP_FOR_2]] = bitcast i32* [[GEP_FOR_1]] to float*
-; CHECK-NEXT: [[GEP_FOR_2_SROA_GEP]] = getelementptr inbounds float, float* [[GEP_FOR_2]], i32 0
-; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ult i32 [[I]], 10
-; CHECK-NEXT: br i1 [[LOOP_COND]], label [[FOR]], label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI_END:%.*]] = phi float* [ [[A_SROA_0_0_GEP_A_1_SROA_CAST2]], [[ENTRY]] ], [ [[PHI]], [[FOR]] ]
-; CHECK-NEXT: [[PHI_END_1:%.*]] = bitcast float* [[PHI_END]] to i32*
-; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[PHI_END_1]], align 4
-; CHECK-NEXT: ret i32 [[LOAD]]
-;
-entry:
- %a = alloca %pair, align 4
- %gep_a = getelementptr inbounds %pair, %pair* %a, i32 0, i32 1
- %gep_a.1 = bitcast i32* %gep_a to float*
- br i1 %cond, label %for, label %end
-
-for:
- %phi_i = phi i32 [ 0, %entry ], [ %i, %for ]
- %phi = phi float* [ %gep_a.1, %entry], [ %gep_for.2, %for ]
- %i = add i32 %phi_i, 1
- %gep_for = getelementptr inbounds float, float* %phi, i32 0
- %gep_for.1 = bitcast float* %gep_for to i32*
- %gep_for.2 = bitcast i32* %gep_for.1 to float*
- %loop.cond = icmp ult i32 %i, 10
- br i1 %loop.cond, label %for, label %end
-
-end:
- %phi_end = phi float* [ %gep_a.1, %entry], [ %phi, %for ]
- %phi_end.1 = bitcast float* %phi_end to i32*
- %load = load i32, i32* %phi_end.1, align 4
- ret i32 %load
-}
-
-define i32 @test_sroa_invoke_phi_gep(i1 %cond) personality i32 (...)* @__gxx_personality_v0 {
-; CHECK-LABEL: @test_sroa_invoke_phi_gep(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[A:%.*]] = alloca [[PAIR:%.*]], align 4
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[CALL:%.*]], label [[END:%.*]]
-; CHECK: call:
-; CHECK-NEXT: [[B:%.*]] = invoke %pair* @foo()
-; CHECK-NEXT: to label [[END]] unwind label [[INVOKE_CATCH:%.*]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI:%.*]] = phi %pair* [ [[A]], [[ENTRY:%.*]] ], [ [[B]], [[CALL]] ]
-; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[PHI]], i32 0, i32 1
-; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[GEP]], align 4
-; CHECK-NEXT: ret i32 [[LOAD]]
-; CHECK: invoke_catch:
-; CHECK-NEXT: [[RES:%.*]] = landingpad { i8*, i32 }
-; CHECK-NEXT: catch i8* null
-; CHECK-NEXT: ret i32 0
-;
-entry:
- %a = alloca %pair, align 4
- br i1 %cond, label %call, label %end
-
-call:
- %b = invoke %pair* @foo()
- to label %end unwind label %invoke_catch
-
-end:
- %phi = phi %pair* [ %a, %entry], [ %b, %call ]
- %gep = getelementptr inbounds %pair, %pair* %phi, i32 0, i32 1
- %load = load i32, i32* %gep, align 4
- ret i32 %load
-
-invoke_catch:
- %res = landingpad { i8*, i32 }
- catch i8* null
- ret i32 0
-}
-
-define i32 @test_sroa_phi_gep_nonconst_idx(i1 %cond, i32 %idx) {
-; CHECK-LABEL: @test_sroa_phi_gep_nonconst_idx(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[A:%.*]] = alloca [[PAIR:%.*]], align 4
-; CHECK-NEXT: [[B:%.*]] = alloca [[PAIR]], align 4
-; CHECK-NEXT: [[GEP_A:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[A]], i32 0, i32 1
-; CHECK-NEXT: [[GEP_B:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[B]], i32 0, i32 1
-; CHECK-NEXT: store i32 1, i32* [[GEP_A]], align 4
-; CHECK-NEXT: store i32 2, i32* [[GEP_B]], align 4
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[END:%.*]]
-; CHECK: if.then:
-; CHECK-NEXT: br label [[END]]
-; CHECK: end:
-; CHECK-NEXT: [[PHI:%.*]] = phi %pair* [ [[A]], [[ENTRY:%.*]] ], [ [[B]], [[IF_THEN]] ]
-; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[PHI]], i32 [[IDX:%.*]], i32 1
-; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[GEP]], align 4
-; CHECK-NEXT: ret i32 [[LOAD]]
-;
-entry:
- %a = alloca %pair, align 4
- %b = alloca %pair, align 4
- %gep_a = getelementptr inbounds %pair, %pair* %a, i32 0, i32 1
- %gep_b = getelementptr inbounds %pair, %pair* %b, i32 0, i32 1
- store i32 1, i32* %gep_a, align 4
- store i32 2, i32* %gep_b, align 4
- br i1 %cond, label %if.then, label %end
-
-if.then:
- br label %end
-
-end:
- %phi = phi %pair* [ %a, %entry], [ %b, %if.then ]
- %gep = getelementptr inbounds %pair, %pair* %phi, i32 %idx, i32 1
- %load = load i32, i32* %gep, align 4
- ret i32 %load
-}
-
-declare %pair* @foo()
-
-declare i32 @__gxx_personality_v0(...)
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