forked from OSchip/llvm-project
541 lines
17 KiB
LLVM
541 lines
17 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; REQUIRES: asserts
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; RUN: opt -licm -basicaa -ipt-expensive-asserts=true < %s -S | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' -ipt-expensive-asserts=true < %s -S | FileCheck %s
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; Hoist guard and load.
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define void @test1(i1 %cond, i32* %ptr) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND:%.*]]) [ "deopt"(i32 0) ]
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; CHECK-NEXT: [[VAL:%.*]] = load i32, i32* [[PTR:%.*]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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call void (i1, ...) @llvm.experimental.guard(i1 %cond) ["deopt" (i32 0)]
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%val = load i32, i32* %ptr
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%x.inc = add i32 %x, %val
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br label %loop
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}
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; Can't hoist over a side effect
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define void @test2(i1 %cond, i32* %ptr) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: store i32 0, i32* [[PTR:%.*]]
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND:%.*]]) [ "deopt"(i32 0) ]
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; CHECK-NEXT: [[VAL:%.*]] = load i32, i32* [[PTR]]
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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store i32 0, i32* %ptr
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call void (i1, ...) @llvm.experimental.guard(i1 %cond) ["deopt" (i32 0)]
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%val = load i32, i32* %ptr
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%x.inc = add i32 %x, %val
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br label %loop
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}
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; Can't hoist over a side effect
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define void @test2b(i1 %cond, i32* %ptr) {
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; CHECK-LABEL: @test2b(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[P2:%.*]] = getelementptr i32, i32* [[PTR:%.*]], i32 1
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: store i32 0, i32* [[P2]]
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND:%.*]]) [ "deopt"(i32 0) ]
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; CHECK-NEXT: [[VAL:%.*]] = load i32, i32* [[PTR]]
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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%p2 = getelementptr i32, i32* %ptr, i32 1
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store i32 0, i32* %p2
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call void (i1, ...) @llvm.experimental.guard(i1 %cond) ["deopt" (i32 0)]
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%val = load i32, i32* %ptr
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%x.inc = add i32 %x, %val
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br label %loop
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}
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; Hoist guard. Cannot hoist load because of aliasing.
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define void @test3(i1 %cond, i32* %ptr) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND:%.*]]) [ "deopt"(i32 0) ]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[VAL:%.*]] = load i32, i32* [[PTR:%.*]]
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; CHECK-NEXT: store i32 0, i32* [[PTR]]
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; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]
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call void (i1, ...) @llvm.experimental.guard(i1 %cond) ["deopt" (i32 0)]
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%val = load i32, i32* %ptr
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store i32 0, i32* %ptr
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%x.inc = add i32 %x, %val
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br label %loop
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}
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; Hoist load and guard.
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define void @test4(i1 %c, i32* %p) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
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; CHECK: if.true:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: if.false:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
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%iv.next = add i32 %iv, 1
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br i1 %c, label %if.true, label %if.false
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if.true:
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br label %backedge
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if.false:
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br label %backedge
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backedge:
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%a = load i32, i32* %p
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%invariant_cond = icmp ne i32 %a, 100
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call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
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%loop_cond = icmp slt i32 %iv.next, 1000
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br i1 %loop_cond, label %loop, label %exit
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exit:
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ret void
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}
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; Do not hoist across a conditionally executed side effect.
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define void @test4a(i1 %c, i32* %p, i32* %q) {
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; CHECK-LABEL: @test4a(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
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; CHECK: if.true:
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; CHECK-NEXT: store i32 123, i32* [[Q:%.*]]
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: if.false:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
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%iv.next = add i32 %iv, 1
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br i1 %c, label %if.true, label %if.false
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if.true:
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store i32 123, i32* %q
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br label %backedge
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if.false:
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br label %backedge
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backedge:
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%a = load i32, i32* %p
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%invariant_cond = icmp ne i32 %a, 100
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call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
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%loop_cond = icmp slt i32 %iv.next, 1000
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br i1 %loop_cond, label %loop, label %exit
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exit:
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ret void
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}
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; Do not hoist a conditionally executed guard.
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define void @test4b(i1 %c, i32* %p, i32* %q) {
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; CHECK-LABEL: @test4b(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
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; CHECK: if.true:
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; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: if.false:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
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%iv.next = add i32 %iv, 1
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br i1 %c, label %if.true, label %if.false
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if.true:
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%a = load i32, i32* %p
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%invariant_cond = icmp ne i32 %a, 100
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call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
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br label %backedge
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if.false:
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br label %backedge
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backedge:
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%loop_cond = icmp slt i32 %iv.next, 1000
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br i1 %loop_cond, label %loop, label %exit
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exit:
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ret void
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}
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; Hoist store, load and guard.
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define void @test4c(i1 %c, i32* %p, i8* noalias %s) {
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; CHECK-LABEL: @test4c(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i8 0, i8* [[S:%.*]]
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; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
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; CHECK: if.true:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: if.false:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
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%iv.next = add i32 %iv, 1
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store i8 0, i8* %s
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br i1 %c, label %if.true, label %if.false
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if.true:
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br label %backedge
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if.false:
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br label %backedge
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backedge:
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%a = load i32, i32* %p
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%invariant_cond = icmp ne i32 %a, 100
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call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
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%loop_cond = icmp slt i32 %iv.next, 1000
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br i1 %loop_cond, label %loop, label %exit
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exit:
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ret void
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}
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; Check that we don't hoist across a store in a conditionally executed block.
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define void @test4d(i1 %c, i32* %p, i8* noalias %s) {
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; CHECK-LABEL: @test4d(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
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; CHECK: if.true:
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; CHECK-NEXT: store i8 0, i8* [[S:%.*]]
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: if.false:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
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%iv.next = add i32 %iv, 1
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br i1 %c, label %if.true, label %if.false
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if.true:
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store i8 0, i8* %s
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br label %backedge
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if.false:
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br label %backedge
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backedge:
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%a = load i32, i32* %p
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%invariant_cond = icmp ne i32 %a, 100
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call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
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%loop_cond = icmp slt i32 %iv.next, 1000
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br i1 %loop_cond, label %loop, label %exit
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exit:
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ret void
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}
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; Check that we don't hoist across a store before the guard in the backedge.
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define void @test4e(i1 %c, i32* %p, i8* noalias %s) {
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; CHECK-LABEL: @test4e(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
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; CHECK-NEXT: store i8 0, i8* [[S:%.*]]
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
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; CHECK: if.true:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: if.false:
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; CHECK-NEXT: br label [[BACKEDGE]]
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; CHECK: backedge:
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
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%iv.next = add i32 %iv, 1
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br i1 %c, label %if.true, label %if.false
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if.true:
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br label %backedge
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if.false:
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br label %backedge
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backedge:
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%a = load i32, i32* %p
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%invariant_cond = icmp ne i32 %a, 100
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store i8 0, i8* %s
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call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
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%loop_cond = icmp slt i32 %iv.next, 1000
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br i1 %loop_cond, label %loop, label %exit
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exit:
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ret void
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}
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|
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; Check that we can hoist the guard in spite of store which happens after.
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define void @test4f(i1 %c, i32* %p, i8* noalias %s) {
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; CHECK-LABEL: @test4f(
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|
; CHECK-NEXT: entry:
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|
; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
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; CHECK-NEXT: store i8 0, i8* [[S:%.*]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
|
|
; CHECK: if.true:
|
|
; CHECK-NEXT: br label [[BACKEDGE]]
|
|
; CHECK: if.false:
|
|
; CHECK-NEXT: br label [[BACKEDGE]]
|
|
; CHECK: backedge:
|
|
; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
|
|
; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
|
|
%iv.next = add i32 %iv, 1
|
|
br i1 %c, label %if.true, label %if.false
|
|
|
|
if.true:
|
|
br label %backedge
|
|
|
|
if.false:
|
|
br label %backedge
|
|
|
|
backedge:
|
|
%a = load i32, i32* %p
|
|
%invariant_cond = icmp ne i32 %a, 100
|
|
call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
|
|
store i8 0, i8* %s
|
|
%loop_cond = icmp slt i32 %iv.next, 1000
|
|
br i1 %loop_cond, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Do not hoist an invariant guard across a variant guard.
|
|
define void @test5(i1 %c, i32* %p, i32* %q) {
|
|
; CHECK-LABEL: @test5(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
|
|
; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
|
|
; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
|
|
; CHECK-NEXT: [[VARIANT_COND:%.*]] = icmp ne i32 [[A]], [[IV]]
|
|
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[VARIANT_COND]]) [ "deopt"() ]
|
|
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
|
|
; CHECK-NEXT: br label [[BACKEDGE]]
|
|
; CHECK: backedge:
|
|
; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
|
|
; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
|
|
%iv.next = add i32 %iv, 1
|
|
%a = load i32, i32* %p
|
|
%invariant_cond = icmp ne i32 %a, 100
|
|
%variant_cond = icmp ne i32 %a, %iv
|
|
call void (i1, ...) @llvm.experimental.guard(i1 %variant_cond) [ "deopt"() ]
|
|
call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
|
|
br label %backedge
|
|
|
|
backedge:
|
|
%loop_cond = icmp slt i32 %iv.next, 1000
|
|
br i1 %loop_cond, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Hoist an invariant guard, leave the following variant guard in the loop.
|
|
define void @test5a(i1 %c, i32* %p, i32* %q) {
|
|
; CHECK-LABEL: @test5a(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
|
|
; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
|
|
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
|
|
; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
|
|
; CHECK-NEXT: [[VARIANT_COND:%.*]] = icmp ne i32 [[A]], [[IV]]
|
|
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[VARIANT_COND]]) [ "deopt"() ]
|
|
; CHECK-NEXT: br label [[BACKEDGE]]
|
|
; CHECK: backedge:
|
|
; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
|
|
; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
|
|
%iv.next = add i32 %iv, 1
|
|
%a = load i32, i32* %p
|
|
%invariant_cond = icmp ne i32 %a, 100
|
|
%variant_cond = icmp ne i32 %a, %iv
|
|
call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond) [ "deopt"() ]
|
|
call void (i1, ...) @llvm.experimental.guard(i1 %variant_cond) [ "deopt"() ]
|
|
br label %backedge
|
|
|
|
backedge:
|
|
%loop_cond = icmp slt i32 %iv.next, 1000
|
|
br i1 %loop_cond, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
declare void @llvm.experimental.guard(i1, ...)
|