forked from OSchip/llvm-project
83 lines
3.3 KiB
LLVM
83 lines
3.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -make-guards-explicit -basicaa -licm < %s | FileCheck %s
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; RUN: opt -S -aa-pipeline=basic-aa -passes='require<opt-remark-emit>,make-guards-explicit,loop(licm)' < %s | FileCheck %s
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; Test interaction between explicit guards and LICM: make sure that we do not
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; hoist explicit conditions while we can hoist invariant loads in presence of
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; explicit guards.
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declare void @llvm.experimental.guard(i1,...)
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; Make sure that we do not hoist widenable_cond out of loop.
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define void @do_not_hoist_widenable_cond(i1 %cond, i32 %N, i32 %M) {
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; CHECK-LABEL: @do_not_hoist_widenable_cond(
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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:%.*]], [[GUARDED:%.*]] ]
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; CHECK-NEXT: [[GUARD_COND:%.*]] = icmp slt i32 [[IV]], [[N:%.*]]
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; CHECK-NEXT: [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition()
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; CHECK-NEXT: [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[GUARD_COND]], [[WIDENABLE_COND]]
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; CHECK-NEXT: br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED]], label [[DEOPT:%.*]], !prof !0
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; CHECK: deopt:
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; CHECK-NEXT: call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"() ]
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; CHECK-NEXT: ret void
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; CHECK: guarded:
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV]], [[M:%.*]]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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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, %loop ]
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%guard_cond = icmp slt i32 %iv, %N
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call void(i1, ...) @llvm.experimental.guard(i1 %guard_cond) [ "deopt"() ]
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%loop_cond = icmp slt i32 %iv, %M
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%iv.next = add i32 %iv, 1
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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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define void @hoist_invariant_load(i1 %cond, i32* %np, i32 %M) {
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; CHECK-LABEL: @hoist_invariant_load(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N:%.*]] = load i32, i32* [[NP:%.*]]
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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:%.*]], [[GUARDED:%.*]] ]
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; CHECK-NEXT: [[GUARD_COND:%.*]] = icmp slt i32 [[IV]], [[N]]
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; CHECK-NEXT: [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition()
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; CHECK-NEXT: [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[GUARD_COND]], [[WIDENABLE_COND]]
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; CHECK-NEXT: br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED]], label [[DEOPT:%.*]], !prof !0
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; CHECK: deopt:
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; CHECK-NEXT: call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"() ]
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; CHECK-NEXT: ret void
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; CHECK: guarded:
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV]], [[M:%.*]]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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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, %loop ]
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%N = load i32, i32* %np
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%guard_cond = icmp slt i32 %iv, %N
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call void(i1, ...) @llvm.experimental.guard(i1 %guard_cond) [ "deopt"() ]
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%loop_cond = icmp slt i32 %iv, %M
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%iv.next = add i32 %iv, 1
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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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