/
post-inc-range.ll
289 lines (227 loc) · 7.2 KB
/
post-inc-range.ll
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; RUN: opt < %s -indvars -indvars-post-increment-ranges -S | FileCheck %s
target datalayout = "p:64:64:64-n32:64"
; When the IV in this loop is widened we want to widen this use as well:
; icmp slt i32 %i.inc, %limit
; In order to do this indvars need to prove that the narrow IV def (%i.inc)
; is not-negative from the range check inside of the loop.
define void @test(i32* %base, i32 %limit, i32 %start) {
; CHECK-LABEL: @test(
; CHECK-NOT: trunc
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
%within_limits = icmp ult i32 %i, 64
br i1 %within_limits, label %continue, label %for.end
continue:
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
br label %for.inc
for.inc:
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}
define void @test_false_edge(i32* %base, i32 %limit, i32 %start) {
; CHECK-LABEL: @test_false_edge(
; CHECK-NOT: trunc
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
%out_of_bounds = icmp ugt i32 %i, 64
br i1 %out_of_bounds, label %for.end, label %continue
continue:
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
br label %for.inc
for.inc:
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}
define void @test_range_metadata(i32* %array_length_ptr, i32* %base,
i32 %limit, i32 %start) {
; CHECK-LABEL: @test_range_metadata(
; CHECK-NOT: trunc
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
%array_length = load i32, i32* %array_length_ptr, !range !{i32 0, i32 64 }
%within_limits = icmp ult i32 %i, %array_length
br i1 %within_limits, label %continue, label %for.end
continue:
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
br label %for.inc
for.inc:
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}
; Negative version of the test above, we don't know anything about
; array_length_ptr range.
define void @test_neg(i32* %array_length_ptr, i32* %base,
i32 %limit, i32 %start) {
; CHECK-LABEL: @test_neg(
; CHECK: trunc i64
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
%array_length = load i32, i32* %array_length_ptr
%within_limits = icmp ult i32 %i, %array_length
br i1 %within_limits, label %continue, label %for.end
continue:
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
br label %for.inc
for.inc:
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}
define void @test_transitive_use(i32* %base, i32 %limit, i32 %start) {
; CHECK-LABEL: @test_transitive_use(
; CHECK-NOT: trunc
; CHECK: %result = icmp slt i64
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
%within_limits = icmp ult i32 %i, 64
br i1 %within_limits, label %continue, label %for.end
continue:
%i.mul.3 = mul nsw nuw i32 %i, 3
%mul_within = icmp ult i32 %i.mul.3, 64
br i1 %mul_within, label %guarded, label %continue.2
guarded:
%i.mul.3.inc = add nsw nuw i32 %i.mul.3, 1
%result = icmp slt i32 %i.mul.3.inc, %limit
br i1 %result, label %continue.2, label %for.end
continue.2:
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
br label %for.inc
for.inc:
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}
declare void @llvm.experimental.guard(i1, ...)
define void @test_guard_one_bb(i32* %base, i32 %limit, i32 %start) {
; CHECK-LABEL: @test_guard_one_bb(
; CHECK-NOT: trunc
; CHECK-NOT: icmp slt i32
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.body ]
%within_limits = icmp ult i32 %i, 64
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
call void(i1, ...) @llvm.experimental.guard(i1 %within_limits) [ "deopt"() ]
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}
define void @test_guard_in_the_same_bb(i32* %base, i32 %limit, i32 %start) {
; CHECK-LABEL: @test_guard_in_the_same_bb(
; CHECK-NOT: trunc
; CHECK-NOT: icmp slt i32
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
%within_limits = icmp ult i32 %i, 64
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
br label %for.inc
for.inc:
call void(i1, ...) @llvm.experimental.guard(i1 %within_limits) [ "deopt"() ]
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}
define void @test_guard_in_idom(i32* %base, i32 %limit, i32 %start) {
; CHECK-LABEL: @test_guard_in_idom(
; CHECK-NOT: trunc
; CHECK-NOT: icmp slt i32
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.inc ]
%within_limits = icmp ult i32 %i, 64
call void(i1, ...) @llvm.experimental.guard(i1 %within_limits) [ "deopt"() ]
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
br label %for.inc
for.inc:
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}
define void @test_guard_merge_ranges(i32* %base, i32 %limit, i32 %start) {
; CHECK-LABEL: @test_guard_merge_ranges(
; CHECK-NOT: trunc
; CHECK-NOT: icmp slt i32
for.body.lr.ph:
br label %for.body
for.body:
%i = phi i32 [ %start, %for.body.lr.ph ], [ %i.inc, %for.body ]
%within_limits.1 = icmp ult i32 %i, 64
call void(i1, ...) @llvm.experimental.guard(i1 %within_limits.1) [ "deopt"() ]
%within_limits.2 = icmp ult i32 %i, 2147483647
call void(i1, ...) @llvm.experimental.guard(i1 %within_limits.2) [ "deopt"() ]
%i.i64 = zext i32 %i to i64
%arrayidx = getelementptr inbounds i32, i32* %base, i64 %i.i64
%val = load i32, i32* %arrayidx, align 4
%i.inc = add nsw nuw i32 %i, 1
%cmp = icmp slt i32 %i.inc, %limit
br i1 %cmp, label %for.body, label %for.end
for.end:
br label %exit
exit:
ret void
}