235 lines
9.1 KiB
LLVM
235 lines
9.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -aa-pipeline=basic-aa -passes='require<opt-remark-emit>,make-guards-explicit,loop-mssa(licm)' < %s | FileCheck %s
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declare void @llvm.experimental.guard(i1,...)
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declare void @maythrow()
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declare void @llvm.experimental.deoptimize.isVoid(...)
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declare i1 @llvm.experimental.widenable.condition()
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; Make sure that we do not hoist widenable_cond out of loop.
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; Widenable conditions don't actually alias anything or throw, however
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; hoisting them is not profitable because it can prevent guard widening
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; in loop.
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; If we want to widen guards in branch form, we need to generate them
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; at the point of widenable_condition call
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; (see https://github.com/llvm/llvm-project/issues/60234). Because of
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; this, hoisting a widenable condition out of loop can make widening of
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; in-loop conditions impossible (e.g. if they depend on loop variant). On
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; the other hand, hoisting of the WC doesn't really see profitable,
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; because it will be optimized away later anyways. So the test checks that
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; LICM will not move it 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 [[PROF0:![0-9]+]]
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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 @do_not_hoist_widenable_cond_speculate(i1 %cond, i32 %N, i32 %M) {
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; CHECK-LABEL: @do_not_hoist_widenable_cond_speculate(
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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: call void @maythrow()
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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 [[PROF0]]
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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 @maythrow()
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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, ptr %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, ptr [[NP:%.*]], align 4
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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 [[PROF0]]
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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, ptr %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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; TODO: Hoist widenable condition out of loop since it's the only
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; non-invariant operand of its user. If we hoist wc here, we can hoist
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; `and` as well, otherwise it prevents us from doing that.
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define void @hoist_widenable_cond_1(ptr %p, i32 %x) {
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; CHECK-LABEL: @hoist_widenable_cond_1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[LOAD:%.*]] = load atomic i32, ptr [[P:%.*]] unordered, align 8
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; CHECK-NEXT: [[ICMP7:%.*]] = icmp ult i32 0, [[LOAD]]
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; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
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; CHECK: loop.header:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[ICMP:%.*]] = icmp ult i32 [[IV]], [[X:%.*]]
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; CHECK-NEXT: br i1 [[ICMP]], label [[LOOP_BODY:%.*]], label [[EXIT:%.*]]
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; CHECK: loop.body:
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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 [[ICMP7]], [[WIDENABLE_COND]]
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; CHECK-NEXT: br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED]], label [[DEOPT:%.*]]
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; CHECK: deopt:
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; CHECK-NEXT: call void (...) @llvm.experimental.deoptimize.isVoid(i32 13) [ "deopt"() ]
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; CHECK-NEXT: ret void
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; CHECK: guarded:
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; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
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; CHECK-NEXT: br label [[LOOP_HEADER]]
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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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%load = load atomic i32, ptr %p unordered, align 8
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br label %loop.header
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loop.header:
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%iv = phi i32 [ %iv.next, %guarded ], [ 0, %entry ]
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%icmp = icmp ult i32 %iv, %x
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br i1 %icmp, label %loop.body, label %exit
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loop.body:
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%icmp7 = icmp ult i32 0, %load
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%widenable_cond = call i1 @llvm.experimental.widenable.condition()
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%exiplicit_guard_cond = and i1 %icmp7, %widenable_cond
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br i1 %exiplicit_guard_cond, label %guarded, label %deopt
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deopt:
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call void (...) @llvm.experimental.deoptimize.isVoid(i32 13) [ "deopt"() ]
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ret void
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guarded:
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%iv.next = add nuw nsw i32 %iv, 1
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br label %loop.header
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exit:
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ret void
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}
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; Same as hoist_widenable_cond_1 test, but widenable condition goes before
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; icmp - the second operand of wc's user.
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; TODO: Hoist widenable condition out of loop.
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define void @hoist_widenable_cond_2(ptr %p, i32 %x) {
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; CHECK-LABEL: @hoist_widenable_cond_2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[LOAD:%.*]] = load atomic i32, ptr [[P:%.*]] unordered, align 8
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; CHECK-NEXT: [[ICMP7:%.*]] = icmp ult i32 0, [[LOAD]]
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; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
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; CHECK: loop.header:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[ICMP:%.*]] = icmp ult i32 [[IV]], [[X:%.*]]
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; CHECK-NEXT: br i1 [[ICMP]], label [[LOOP_BODY:%.*]], label [[EXIT:%.*]]
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; CHECK: loop.body:
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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 [[ICMP7]], [[WIDENABLE_COND]]
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; CHECK-NEXT: br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED]], label [[DEOPT:%.*]]
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; CHECK: deopt:
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; CHECK-NEXT: call void (...) @llvm.experimental.deoptimize.isVoid(i32 13) [ "deopt"() ]
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; CHECK-NEXT: ret void
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; CHECK: guarded:
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; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
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; CHECK-NEXT: br label [[LOOP_HEADER]]
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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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%load = load atomic i32, ptr %p unordered, align 8
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br label %loop.header
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loop.header:
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%iv = phi i32 [ %iv.next, %guarded ], [ 0, %entry ]
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%icmp = icmp ult i32 %iv, %x
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br i1 %icmp, label %loop.body, label %exit
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loop.body:
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%widenable_cond = call i1 @llvm.experimental.widenable.condition()
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%icmp7 = icmp ult i32 0, %load
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%exiplicit_guard_cond = and i1 %icmp7, %widenable_cond
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br i1 %exiplicit_guard_cond, label %guarded, label %deopt
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deopt:
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call void (...) @llvm.experimental.deoptimize.isVoid(i32 13) [ "deopt"() ]
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ret void
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guarded:
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%iv.next = add nuw nsw i32 %iv, 1
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br label %loop.header
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exit:
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ret void
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}
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