File: indirect-call.ll

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llvm-toolchain-5.0 1:5.0.1-2~bpo9+1
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; RUN: opt < %s -gvn-sink -simplifycfg -simplifycfg-sink-common=false -S | FileCheck %s

declare i8 @ext(i1)

define zeroext i1 @test1(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks, i8(i1)* %ext) {
entry:
  %cmp = icmp uge i32 %blksA, %nblks
  br i1 %flag, label %if.then, label %if.else

; CHECK-LABEL: test1
; CHECK: call i8 @ext
; CHECK: call i8 %ext
if.then:
  %frombool1 = call i8 @ext(i1 %cmp)
  br label %if.end

if.else:
  %frombool3 = call i8 %ext(i1 %cmp)
  br label %if.end

if.end:
  %obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ]
  %tobool4 = icmp ne i8 %obeys.0, 0
  ret i1 %tobool4
}

define zeroext i1 @test2(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks, i8(i1)* %ext) {
entry:
  %cmp = icmp uge i32 %blksA, %nblks
  br i1 %flag, label %if.then, label %if.else

; CHECK-LABEL: test2
; CHECK: call i8 %ext
; CHECK-NOT: call
if.then:
  %frombool1 = call i8 %ext(i1 %cmp)
  br label %if.end

if.else:
  %frombool3 = call i8 %ext(i1 %cmp)
  br label %if.end

if.end:
  %obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ]
  %tobool4 = icmp ne i8 %obeys.0, 0
  ret i1 %tobool4
}

define zeroext i1 @test3(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks, i8(i1)* %ext1, i8(i1)* %ext2) {
entry:
  %cmp = icmp uge i32 %blksA, %nblks
  br i1 %flag, label %if.then, label %if.else

; CHECK-LABEL: test3
; CHECK: %[[x:.*]] = select i1 %flag, i8 (i1)* %ext1, i8 (i1)* %ext2
; CHECK: call i8 %[[x]](i1 %cmp)
; CHECK-NOT: call
if.then:
  %frombool1 = call i8 %ext1(i1 %cmp)
  br label %if.end

if.else:
  %frombool3 = call i8 %ext2(i1 %cmp)
  br label %if.end

if.end:
  %obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ]
  %tobool4 = icmp ne i8 %obeys.0, 0
  ret i1 %tobool4
}