forked from OSchip/llvm-project
290 lines
7.2 KiB
LLVM
290 lines
7.2 KiB
LLVM
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; RUN: opt < %s -indvars -indvars-post-increment-ranges -S | FileCheck %s
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target datalayout = "p:64:64:64-n32:64"
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; When the IV in this loop is widened we want to widen this use as well:
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; icmp slt i32 %i.inc, %limit
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; In order to do this indvars need to prove that the narrow IV def (%i.inc)
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; is not-negative from the range check inside of the loop.
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define void @test(i32* %base, i32 %limit, i32 %start) {
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; CHECK-LABEL: @test(
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; CHECK-NOT: trunc
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
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%within_limits = icmp ult i32 %i, 64
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br i1 %within_limits, label %continue, label %for.end
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continue:
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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br label %for.inc
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for.inc:
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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define void @test_false_edge(i32* %base, i32 %limit, i32 %start) {
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; CHECK-LABEL: @test_false_edge(
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; CHECK-NOT: trunc
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
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%out_of_bounds = icmp ugt i32 %i, 64
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br i1 %out_of_bounds, label %for.end, label %continue
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continue:
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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br label %for.inc
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for.inc:
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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define void @test_range_metadata(i32* %array_length_ptr, i32* %base,
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i32 %limit, i32 %start) {
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; CHECK-LABEL: @test_range_metadata(
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; CHECK-NOT: trunc
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
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%array_length = load i32, i32* %array_length_ptr, !range !{i32 0, i32 64 }
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%within_limits = icmp ult i32 %i, %array_length
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br i1 %within_limits, label %continue, label %for.end
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continue:
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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br label %for.inc
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for.inc:
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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; Negative version of the test above, we don't know anything about
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; array_length_ptr range.
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define void @test_neg(i32* %array_length_ptr, i32* %base,
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i32 %limit, i32 %start) {
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; CHECK-LABEL: @test_neg(
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; CHECK: trunc i64
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
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%array_length = load i32, i32* %array_length_ptr
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%within_limits = icmp ult i32 %i, %array_length
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br i1 %within_limits, label %continue, label %for.end
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continue:
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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br label %for.inc
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for.inc:
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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define void @test_transitive_use(i32* %base, i32 %limit, i32 %start) {
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; CHECK-LABEL: @test_transitive_use(
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; CHECK-NOT: trunc
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; CHECK: %result = icmp slt i64
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
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%within_limits = icmp ult i32 %i, 64
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br i1 %within_limits, label %continue, label %for.end
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continue:
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%i.mul.3 = mul nsw nuw i32 %i, 3
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%mul_within = icmp ult i32 %i.mul.3, 64
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br i1 %mul_within, label %guarded, label %continue.2
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guarded:
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%i.mul.3.inc = add nsw nuw i32 %i.mul.3, 1
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%result = icmp slt i32 %i.mul.3.inc, %limit
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br i1 %result, label %continue.2, label %for.end
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continue.2:
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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br label %for.inc
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for.inc:
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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declare void @llvm.experimental.guard(i1, ...)
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define void @test_guard_one_bb(i32* %base, i32 %limit, i32 %start) {
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; CHECK-LABEL: @test_guard_one_bb(
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; CHECK-NOT: trunc
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; CHECK-NOT: icmp slt i32
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.body ]
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%within_limits = icmp ult i32 %i, 64
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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call void(i1, ...) @llvm.experimental.guard(i1 %within_limits) [ "deopt"() ]
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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define void @test_guard_in_the_same_bb(i32* %base, i32 %limit, i32 %start) {
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; CHECK-LABEL: @test_guard_in_the_same_bb(
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; CHECK-NOT: trunc
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; CHECK-NOT: icmp slt i32
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
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%within_limits = icmp ult i32 %i, 64
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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br label %for.inc
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for.inc:
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call void(i1, ...) @llvm.experimental.guard(i1 %within_limits) [ "deopt"() ]
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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define void @test_guard_in_idom(i32* %base, i32 %limit, i32 %start) {
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; CHECK-LABEL: @test_guard_in_idom(
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; CHECK-NOT: trunc
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; CHECK-NOT: icmp slt i32
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
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%within_limits = icmp ult i32 %i, 64
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call void(i1, ...) @llvm.experimental.guard(i1 %within_limits) [ "deopt"() ]
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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br label %for.inc
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for.inc:
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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define void @test_guard_merge_ranges(i32* %base, i32 %limit, i32 %start) {
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; CHECK-LABEL: @test_guard_merge_ranges(
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; CHECK-NOT: trunc
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; CHECK-NOT: icmp slt i32
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.body ]
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%within_limits.1 = icmp ult i32 %i, 64
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call void(i1, ...) @llvm.experimental.guard(i1 %within_limits.1) [ "deopt"() ]
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%within_limits.2 = icmp ult i32 %i, 2147483647
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call void(i1, ...) @llvm.experimental.guard(i1 %within_limits.2) [ "deopt"() ]
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%i.i64 = zext i32 %i to i64
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%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
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%val = load i32, i32* %arrayidx, align 4
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%i.inc = add nsw nuw i32 %i, 1
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%cmp = icmp slt i32 %i.inc, %limit
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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br label %exit
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exit:
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ret void
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}
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