File: size-estimator.ll

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llvm-toolchain-19 1%3A19.1.7-3
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

declare i32 @f1(i32)
declare i32 @f2(i32)

define i32 @branches(i32) {
  %cond = icmp slt i32 %0, 3
  br i1 %cond, label %then, label %else

then:
  %ret.1 = call i32 @f1(i32 %0)
  br label %last.block

else:
  %ret.2 = call i32 @f2(i32 %0)
  br label %last.block

last.block:
  %ret = phi i32 [%ret.1, %then], [%ret.2, %else]
  ret i32 %ret
}

define internal i32 @top() {
  %1 = call i32 @branches(i32 2)
  %2 = call i32 @f1(i32 %1)
  ret i32 %2
}