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- ; RUN: opt < %s -lcssa -S | FileCheck %s
- ; CHECK: exit1:
- ; CHECK: .lcssa =
- ; CHECK: exit2:
- ; CHECK: .lcssa1 =
- ; CHECK: exit3:
- ; CHECK-NOT: .lcssa
- ; Test to ensure that when there are multiple exit blocks, PHI nodes are
- ; only inserted by LCSSA when there is a use dominated by a given exit
- ; block.
- declare void @printf(i32 %i)
- define i32 @unused_phis() nounwind {
- entry:
- br label %loop
- loop:
- %i = phi i32 [0, %entry], [1, %then2]
- br i1 undef, label %exit1, label %then1
- then1:
- br i1 undef, label %exit2, label %then2
- then2:
- br i1 undef, label %exit3, label %loop
- exit1:
- call void @printf(i32 %i)
- ret i32 %i
- exit2:
- ret i32 %i
- exit3:
- ret i32 0
- }
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