47 lines
1.7 KiB
LLVM
47 lines
1.7 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt < %s -analyze -enable-new-pm=0 -scalar-evolution -scalar-evolution-classify-expressions=0 | FileCheck %s
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; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
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@mode_table = global [4 x i32] zeroinitializer ; <[4 x i32]*> [#uses=1]
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define i8 @f() {
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; CHECK-LABEL: 'f'
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; CHECK-NEXT: Determining loop execution counts for: @f
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; CHECK-NEXT: Loop %bb: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for bb: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for bb2: 1
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; CHECK-NEXT: Loop %bb: max backedge-taken count is 1
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; CHECK-NEXT: Loop %bb: Unpredictable predicated backedge-taken count.
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;
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entry:
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tail call i32 @fegetround( ) ; <i32>:0 [#uses=1]
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br label %bb
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bb: ; preds = %bb4, %entry
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%mode.0 = phi i8 [ 0, %entry ], [ %indvar.next, %bb4 ] ; <i8> [#uses=4]
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zext i8 %mode.0 to i32 ; <i32>:1 [#uses=1]
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getelementptr [4 x i32], [4 x i32]* @mode_table, i32 0, i32 %1 ; <i32*>:2 [#uses=1]
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load i32, i32* %2, align 4 ; <i32>:3 [#uses=1]
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icmp eq i32 %3, %0 ; <i1>:4 [#uses=1]
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br i1 %4, label %bb1, label %bb2
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bb1: ; preds = %bb
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ret i8 %mode.0
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bb2: ; preds = %bb
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icmp eq i8 %mode.0, 1 ; <i1>:5 [#uses=1]
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br i1 %5, label %bb5, label %bb4
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bb4: ; preds = %bb2
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%indvar.next = add i8 %mode.0, 1 ; <i8> [#uses=1]
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br label %bb
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bb5: ; preds = %bb2
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tail call void @raise_exception( ) noreturn
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unreachable
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}
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declare i32 @fegetround()
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declare void @raise_exception() noreturn
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