phi-check-blocks.ll
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; RUN: opt -S -mergefunc < %s | FileCheck %s
; Ensure that we do not merge functions that are identical with the
; exception of the order of the incoming blocks to a phi.
; CHECK-LABEL: define linkonce_odr hidden i1 @first(i2 %0)
define linkonce_odr hidden i1 @first(i2 %0) {
entry:
; CHECK: switch i2
switch i2 %0, label %default [
i2 0, label %L1
i2 1, label %L2
i2 -2, label %L3
]
default:
unreachable
L1:
br label %done
L2:
br label %done
L3:
br label %done
done:
%result = phi i1 [ true, %L1 ], [ false, %L2 ], [ false, %L3 ]
; CHECK: ret i1
ret i1 %result
}
; CHECK-LABEL: define linkonce_odr hidden i1 @second(i2 %0)
define linkonce_odr hidden i1 @second(i2 %0) {
entry:
; CHECK: switch i2
switch i2 %0, label %default [
i2 0, label %L1
i2 1, label %L2
i2 -2, label %L3
]
default:
unreachable
L1:
br label %done
L2:
br label %done
L3:
br label %done
done:
%result = phi i1 [ true, %L3 ], [ false, %L2 ], [ false, %L1 ]
; CHECK: ret i1
ret i1 %result
}