derek.holloway
7502bf64a4
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36 lines
869 B
LLVM
36 lines
869 B
LLVM
; RUN: opt -S -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
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declare i32 @f(i32 %val)
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; Check that eliminating cases with unreachable branches keeps
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; prof branch_weights metadata consistent with switch instruction.
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define i32 @test_switch_to_unreachable(i32 %val) {
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; CHECK-LABEL: test_switch_to_unreachable
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; CHECK: switch
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; CHECK-NOT: i32 0, label %on0
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switch i32 %val, label %otherwise [
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i32 0, label %on0
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i32 1, label %on1
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i32 2, label %on2
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], !prof !{!"branch_weights", i32 99, i32 0, i32 1, i32 2}
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; CHECK: !prof ![[MD0:[0-9]+]]
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otherwise:
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%result = call i32 @f(i32 -1)
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ret i32 %result
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on0:
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unreachable
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ret i32 125
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on1:
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%result1 = call i32 @f(i32 -2)
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ret i32 %result1
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on2:
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%result2 = call i32 @f(i32 -3)
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ret i32 %result2
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}
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; CHECK: ![[MD0]] = !{!"branch_weights", i32 99, i32 2, i32 1}
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