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https://github.com/RPCS3/llvm-mirror.git
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[LoopPredication] Check whether the loop is already guarded by the first iteration check condition
llvm-svn: 315623
This commit is contained in:
parent
3d81b5870b
commit
04bd1d7c25
@ -289,6 +289,10 @@ Value *LoopPredication::expandCheck(SCEVExpander &Expander,
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Type *Ty = LHS->getType();
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assert(Ty == RHS->getType() && "expandCheck operands have different types?");
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if (SE->isLoopEntryGuardedByCond(L, Pred, LHS, RHS))
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return Builder.getTrue();
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Value *LHSV = Expander.expandCodeFor(LHS, Ty, InsertAt);
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Value *RHSV = Expander.expandCodeFor(RHS, Ty, InsertAt);
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return Builder.CreateICmp(Pred, LHSV, RHSV);
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@ -358,10 +362,10 @@ Optional<Value *> LoopPredication::widenICmpRangeCheck(ICmpInst *ICI,
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return None;
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Instruction *InsertAt = Preheader->getTerminator();
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auto *FirstIterationCheck = expandCheck(Expander, Builder, RangeCheck->Pred,
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Start, RangeCheck->Limit, InsertAt);
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auto *LimitCheck = expandCheck(Expander, Builder, LimitCheckPred,
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LatchCheck.Limit, RangeCheck->Limit, InsertAt);
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auto *FirstIterationCheck = expandCheck(Expander, Builder, RangeCheck->Pred,
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Start, RangeCheck->Limit, InsertAt);
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return Builder.CreateAnd(FirstIterationCheck, LimitCheck);
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}
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@ -11,8 +11,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp ule i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp ule i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -47,8 +47,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp ult i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp ult i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -83,8 +83,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp ule i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp ule i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -119,8 +119,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp sle i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp sle i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -147,6 +147,42 @@ exit:
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ret i32 %result
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}
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define i32 @signed_loop_0_to_n_ult_check_length_range_known(i32* %array, i32* %length.ptr, i32 %n) {
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; CHECK-LABEL: @signed_loop_0_to_n_ult_check_length_range_known
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entry:
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%tmp5 = icmp sle i32 %n, 0
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%length = load i32, i32* %length.ptr, !range !{i32 1, i32 2147483648}
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br i1 %tmp5, label %exit, label %loop.preheader
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[limit_check:[^ ]+]] = icmp sle i32 %n, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 true, [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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loop:
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; CHECK: loop:
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; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ]
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%loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
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%i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
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%within.bounds = icmp ult i32 %i, %length
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call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
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%i.i64 = zext i32 %i to i64
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%array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
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%array.i = load i32, i32* %array.i.ptr, align 4
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%loop.acc.next = add i32 %loop.acc, %array.i
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%i.next = add nuw i32 %i, 1
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%continue = icmp slt i32 %i.next, %n
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br i1 %continue, label %loop, label %exit
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exit:
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%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
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ret i32 %result
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}
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define i32 @signed_loop_0_to_n_inverse_latch_predicate(i32* %array, i32 %length, i32 %n) {
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; CHECK-LABEL: @signed_loop_0_to_n_inverse_latch_predicate
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entry:
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@ -155,8 +191,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp slt i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp slt i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -191,8 +227,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp slt i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp slt i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -295,8 +331,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp sle i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp sle i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -372,11 +408,11 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check_1:[^ ]+]] = icmp ult i32 0, %length.{{1|2}}
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; CHECK-NEXT: [[limit_check_1:[^ ]+]] = icmp ule i32 %n, %length.{{1|2}}
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; CHECK: [[limit_check_1:[^ ]+]] = icmp ule i32 %n, %length.{{1|2}}
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; CHECK-NEXT: [[first_iteration_check_1:[^ ]+]] = icmp ult i32 0, %length.{{1|2}}
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; CHECK-NEXT: [[wide_cond_1:[^ ]+]] = and i1 [[first_iteration_check_1]], [[limit_check_1]]
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; CHECK-NEXT: [[first_iteration_check_2:[^ ]+]] = icmp ult i32 0, %length.{{1|2}}
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; CHECK-NEXT: [[limit_check_2:[^ ]+]] = icmp ule i32 %n, %length.{{1|2}}
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; CHECK-NEXT: [[first_iteration_check_2:[^ ]+]] = icmp ult i32 0, %length.{{1|2}}
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; CHECK-NEXT: [[wide_cond_2:[^ ]+]] = and i1 [[first_iteration_check_2]], [[limit_check_2]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -420,14 +456,14 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check_1:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[limit_check_1:[^ ]+]] = icmp ule i32 %n, %length.{{1|2|3}}
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; CHECK: [[limit_check_1:[^ ]+]] = icmp ule i32 %n, %length.{{1|2|3}}
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; CHECK-NEXT: [[first_iteration_check_1:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[wide_cond_1:[^ ]+]] = and i1 [[first_iteration_check_1]], [[limit_check_1]]
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; CHECK-NEXT: [[first_iteration_check_2:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[limit_check_2:[^ ]+]] = icmp ule i32 %n, %length.{{1|2|3}}
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; CHECK-NEXT: [[first_iteration_check_2:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[wide_cond_2:[^ ]+]] = and i1 [[first_iteration_check_2]], [[limit_check_2]]
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; CHECK-NEXT: [[first_iteration_check_3:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[limit_check_3:[^ ]+]] = icmp ule i32 %n, %length.{{1|2|3}}
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; CHECK-NEXT: [[first_iteration_check_3:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[wide_cond_3:[^ ]+]] = and i1 [[first_iteration_check_3]], [[limit_check_3]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -478,14 +514,14 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check_1:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[limit_check_1:[^ ]+]] = icmp ule i32 %n, %length.{{1|2|3}}
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; CHECK: [[limit_check_1:[^ ]+]] = icmp ule i32 %n, %length.{{1|2|3}}
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; CHECK-NEXT: [[first_iteration_check_1:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[wide_cond_1:[^ ]+]] = and i1 [[first_iteration_check_1]], [[limit_check_1]]
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; CHECK-NEXT: [[first_iteration_check_2:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[limit_check_2:[^ ]+]] = icmp ule i32 %n, %length.{{1|2|3}}
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; CHECK-NEXT: [[first_iteration_check_2:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[wide_cond_2:[^ ]+]] = and i1 [[first_iteration_check_2]], [[limit_check_2]]
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; CHECK-NEXT: [[first_iteration_check_3:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[limit_check_3:[^ ]+]] = icmp ule i32 %n, %length.{{1|2|3}}
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; CHECK-NEXT: [[first_iteration_check_3:[^ ]+]] = icmp ult i32 0, %length.{{1|2|3}}
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; CHECK-NEXT: [[wide_cond_3:[^ ]+]] = and i1 [[first_iteration_check_3]], [[limit_check_3]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -538,8 +574,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp ule i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp ule i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -693,8 +729,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[length:[^ ]+]] = zext i16 %length.i16 to i32
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, [[length]]
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp ule i32 %n, [[length]]
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, [[length]]
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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@ -20,8 +20,8 @@ outer.loop:
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inner.loop.preheader:
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; CHECK: inner.loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp sle i32 %l, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp sle i32 %l, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %inner.loop
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br label %inner.loop
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@ -63,8 +63,8 @@ entry:
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outer.loop.preheader:
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; CHECK: outer.loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp sle i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp sle i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %outer.loop
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br label %outer.loop
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@ -116,8 +116,8 @@ entry:
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outer.loop.preheader:
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; CHECK: outer.loop.preheader:
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; CHECK-NEXT: [[first_iteration_check_outer:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check_outer:[^ ]+]] = icmp sle i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check_outer:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond_outer:[^ ]+]] = and i1 [[first_iteration_check_outer]], [[limit_check_outer]]
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; CHECK-NEXT: br label %outer.loop
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br label %outer.loop
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@ -11,8 +11,8 @@ entry:
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loop.preheader:
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; CHECK: loop.preheader:
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; CHECK: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[limit_check:[^ ]+]] = icmp ule i32 %n, %length
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; CHECK: [[limit_check:[^ ]+]] = icmp ule i32 %n, %length
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; CHECK-NEXT: [[first_iteration_check:[^ ]+]] = icmp ult i32 0, %length
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; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[first_iteration_check]], [[limit_check]]
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; CHECK-NEXT: br label %loop
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br label %loop
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