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by a return that returns a constant, while elsewhere in the function another return instruction returns a different constant. This is a special case of accumulator recursion, so just generalize the existing logic a bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108241 91177308-0d34-0410-b5e6-96231b3b80d8
21 lines
645 B
LLVM
21 lines
645 B
LLVM
; RUN: opt < %s -tailcallelim -S | FileCheck %s
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; PR7328
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; PR7506
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define i32 @foo(i32 %x) {
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; CHECK: define i32 @foo
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; CHECK: %accumulator.tr = phi i32 [ 1, %entry ], [ 0, %body ]
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entry:
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%cond = icmp ugt i32 %x, 0 ; <i1> [#uses=1]
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br i1 %cond, label %return, label %body
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body: ; preds = %entry
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%y = add i32 %x, 1 ; <i32> [#uses=1]
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%tmp = call i32 @foo(i32 %y) ; <i32> [#uses=0]
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; CHECK-NOT: call
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ret i32 0
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; CHECK: ret i32 %accumulator.tr
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return: ; preds = %entry
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ret i32 1
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}
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