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Mark Lacey
04be7e88ef
Check that the incoming blocks of phi nodes are identical, and block function merging if they are not. rdar://problem/26255167 Differential Revision: http://reviews.llvm.org/D20462 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270250 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1006 B
LLVM
51 lines
1006 B
LLVM
; RUN: opt -S -mergefunc < %s | FileCheck %s
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; Ensure that we do not merge functions that are identical with the
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; exception of the order of the incoming blocks to a phi.
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; CHECK-LABEL: define linkonce_odr hidden i1 @first(i2)
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define linkonce_odr hidden i1 @first(i2) {
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entry:
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; CHECK: switch i2
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switch i2 %0, label %default [
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i2 0, label %L1
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i2 1, label %L2
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i2 -2, label %L3
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]
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default:
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unreachable
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L1:
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br label %done
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L2:
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br label %done
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L3:
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br label %done
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done:
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%result = phi i1 [ true, %L1 ], [ false, %L2 ], [ false, %L3 ]
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; CHECK: ret i1
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ret i1 %result
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}
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; CHECK-LABEL: define linkonce_odr hidden i1 @second(i2)
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define linkonce_odr hidden i1 @second(i2) {
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entry:
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; CHECK: switch i2
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switch i2 %0, label %default [
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i2 0, label %L1
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i2 1, label %L2
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i2 -2, label %L3
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]
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default:
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unreachable
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L1:
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br label %done
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L2:
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br label %done
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L3:
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br label %done
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done:
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%result = phi i1 [ true, %L3 ], [ false, %L2 ], [ false, %L1 ]
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; CHECK: ret i1
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ret i1 %result
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}
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