50 lines
1.7 KiB
LLVM
50 lines
1.7 KiB
LLVM
; RUN: opt -analyze -scalar-evolution %s | FileCheck %s
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target triple = "x86_64-unknown-linux-gnu"
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define void @test_and(i16 %in) {
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br label %bb2
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bb2: ; preds = %bb1.i, %bb2, %0
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%_tmp44.i = icmp slt i16 %in, 2
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br i1 %_tmp44.i, label %bb1.i, label %bb2
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bb1.i: ; preds = %bb1.i, %bb2
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%_tmp25.i = phi i16 [ %in, %bb2 ], [ %_tmp6.i, %bb1.i ]
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%_tmp6.i = add nsw i16 %_tmp25.i, 1
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%_tmp10.i = icmp sge i16 %_tmp6.i, 2
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%exitcond.i = icmp eq i16 %_tmp6.i, 2
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%or.cond = and i1 %_tmp10.i, %exitcond.i
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br i1 %or.cond, label %bb2, label %bb1.i
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}
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; CHECK-LABEL: Determining loop execution counts for: @test_and
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; CHECK-NEXT: Loop %bb1.i: backedge-taken count is (1 + (-1 * %in))
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; CHECK-NEXT: Loop %bb1.i: max backedge-taken count is -1
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; CHECK-NEXT: Loop %bb1.i: Predicated backedge-taken count is (1 + (-1 * %in))
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define void @test_or() {
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%C10 = icmp slt i1 undef, undef
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br i1 %C10, label %BB, label %exit
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BB: ; preds = %BB, %0
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%indvars.iv = phi i64 [ -1, %BB ], [ -1, %0 ]
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%sum.01 = phi i32 [ %2, %BB ], [ undef, %0 ]
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%1 = trunc i64 %indvars.iv to i32
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%2 = add nsw i32 %1, %sum.01
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%B3 = add i32 %1, %2
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%C11 = icmp ult i32 %2, %1
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%C5 = icmp sle i32 %1, %B3
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%B = or i1 %C5, %C11
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br i1 %B, label %BB, label %exit
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exit: ; preds = %BB, %0
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ret void
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}
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; CHECK-LABEL: Determining loop execution counts for: @test_or
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; CHECK-NEXT: Loop %BB: backedge-taken count is undef
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; CHECK-NEXT: Loop %BB: max backedge-taken count is -1
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; CHECK-NEXT: Loop %BB: Predicated backedge-taken count is undef
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