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; RUN: opt < %s -simplifycfg -S | FileCheck %s
declare void @foo1()
declare void @foo2()
define void @test1(i32 %V) {
%C1 = icmp eq i32 %V, 4 ; <i1> [#uses=1]
%C2 = icmp eq i32 %V, 17 ; <i1> [#uses=1]
%CN = or i1 %C1, %C2 ; <i1> [#uses=1]
br i1 %CN, label %T, label %F
T: ; preds = %0
call void @foo1( )
ret void
F: ; preds = %0
call void @foo2( )
ret void
; CHECK: @test1
; CHECK: switch i32 %V, label %F [
; CHECK: i32 17, label %T
; CHECK: i32 4, label %T
; CHECK: ]
}
define void @test2(i32 %V) {
%C1 = icmp ne i32 %V, 4 ; <i1> [#uses=1]
%C2 = icmp ne i32 %V, 17 ; <i1> [#uses=1]
%CN = and i1 %C1, %C2 ; <i1> [#uses=1]
br i1 %CN, label %T, label %F
T: ; preds = %0
call void @foo1( )
ret void
F: ; preds = %0
call void @foo2( )
ret void
; CHECK: @test2
; CHECK: switch i32 %V, label %T [
; CHECK: i32 17, label %F
; CHECK: i32 4, label %F
; CHECK: ]
}
define void @test3(i32 %V) {
%C1 = icmp eq i32 %V, 4 ; <i1> [#uses=1]
br i1 %C1, label %T, label %N
N: ; preds = %0
%C2 = icmp eq i32 %V, 17 ; <i1> [#uses=1]
br i1 %C2, label %T, label %F
T: ; preds = %N, %0
call void @foo1( )
ret void
F: ; preds = %N
call void @foo2( )
ret void
; CHECK: @test3
; CHECK: switch i32 %V, label %F [
; CHECK: i32 4, label %T
; CHECK: i32 17, label %T
; CHECK: ]
}
define i32 @test4(i8 zeroext %c) nounwind ssp noredzone {
entry:
%cmp = icmp eq i8 %c, 62
br i1 %cmp, label %lor.end, label %lor.lhs.false
lor.lhs.false: ; preds = %entry
%cmp4 = icmp eq i8 %c, 34
br i1 %cmp4, label %lor.end, label %lor.rhs
lor.rhs: ; preds = %lor.lhs.false
%cmp8 = icmp eq i8 %c, 92
br label %lor.end
lor.end: ; preds = %lor.rhs, %lor.lhs.false, %entry
%0 = phi i1 [ true, %lor.lhs.false ], [ true, %entry ], [ %cmp8, %lor.rhs ]
%lor.ext = zext i1 %0 to i32
ret i32 %lor.ext
; CHECK: @test4
; CHECK: switch i8 %c, label %lor.rhs [
; CHECK: i8 62, label %lor.end
; CHECK: i8 34, label %lor.end
; CHECK: i8 92, label %lor.end
; CHECK: ]
}
define i32 @test5(i8 zeroext %c) nounwind ssp noredzone {
entry:
switch i8 %c, label %lor.rhs [
i8 62, label %lor.end
i8 34, label %lor.end
i8 92, label %lor.end
]
lor.rhs: ; preds = %entry
%V = icmp eq i8 %c, 92
br label %lor.end
lor.end: ; preds = %entry, %entry, %entry, %lor.rhs
%0 = phi i1 [ true, %entry ], [ %V, %lor.rhs ], [ true, %entry ], [ true, %entry ]
%lor.ext = zext i1 %0 to i32
ret i32 %lor.ext
; CHECK: @test5
; CHECK: switch i8 %c, label %lor.rhs [
; CHECK: i8 62, label %lor.end
; CHECK: i8 34, label %lor.end
; CHECK: i8 92, label %lor.end
; CHECK: ]
}
define i1 @test6({ i32, i32 }* %I) {
entry:
%tmp.1.i = getelementptr { i32, i32 }* %I, i64 0, i32 1 ; <i32*> [#uses=1]
%tmp.2.i = load i32* %tmp.1.i ; <i32> [#uses=6]
%tmp.2 = icmp eq i32 %tmp.2.i, 14 ; <i1> [#uses=1]
br i1 %tmp.2, label %shortcirc_done.4, label %shortcirc_next.0
shortcirc_next.0: ; preds = %entry
%tmp.6 = icmp eq i32 %tmp.2.i, 15 ; <i1> [#uses=1]
br i1 %tmp.6, label %shortcirc_done.4, label %shortcirc_next.1
shortcirc_next.1: ; preds = %shortcirc_next.0
%tmp.11 = icmp eq i32 %tmp.2.i, 16 ; <i1> [#uses=1]
br i1 %tmp.11, label %shortcirc_done.4, label %shortcirc_next.2
shortcirc_next.2: ; preds = %shortcirc_next.1
%tmp.16 = icmp eq i32 %tmp.2.i, 17 ; <i1> [#uses=1]
br i1 %tmp.16, label %shortcirc_done.4, label %shortcirc_next.3
shortcirc_next.3: ; preds = %shortcirc_next.2
%tmp.21 = icmp eq i32 %tmp.2.i, 18 ; <i1> [#uses=1]
br i1 %tmp.21, label %shortcirc_done.4, label %shortcirc_next.4
shortcirc_next.4: ; preds = %shortcirc_next.3
%tmp.26 = icmp eq i32 %tmp.2.i, 19 ; <i1> [#uses=1]
br label %UnifiedReturnBlock
shortcirc_done.4: ; preds = %shortcirc_next.3, %shortcirc_next.2, %shortcirc_next.1, %shortcirc_next.0, %entry
br label %UnifiedReturnBlock
UnifiedReturnBlock: ; preds = %shortcirc_done.4, %shortcirc_next.4
%UnifiedRetVal = phi i1 [ %tmp.26, %shortcirc_next.4 ], [ true, %shortcirc_done.4 ] ; <i1> [#uses=1]
ret i1 %UnifiedRetVal
; CHECK: @test6
; CHECK: switch i32 %tmp.2.i, label %shortcirc_next.4 [
; CHECK: i32 14, label %UnifiedReturnBlock
; CHECK: i32 15, label %UnifiedReturnBlock
; CHECK: i32 16, label %UnifiedReturnBlock
; CHECK: i32 17, label %UnifiedReturnBlock
; CHECK: i32 18, label %UnifiedReturnBlock
; CHECK: i32 19, label %switch.edge
; CHECK: ]
}
define void @test7(i8 zeroext %c, i32 %x) nounwind ssp noredzone {
entry:
%cmp = icmp ult i32 %x, 32
%cmp4 = icmp eq i8 %c, 97
%or.cond = or i1 %cmp, %cmp4
%cmp9 = icmp eq i8 %c, 99
%or.cond11 = or i1 %or.cond, %cmp9
br i1 %or.cond11, label %if.then, label %if.end
if.then: ; preds = %entry
tail call void @foo1() nounwind noredzone
ret void
if.end: ; preds = %entry
ret void
; CHECK: @test7
; CHECK: %cmp = icmp ult i32 %x, 32
; CHECK: br i1 %cmp, label %if.then, label %switch.early.test
; CHECK: switch.early.test:
; CHECK: switch i8 %c, label %if.end [
; CHECK: i8 99, label %if.then
; CHECK: i8 97, label %if.then
; CHECK: ]
}
define i32 @test8(i8 zeroext %c, i32 %x, i1 %C) nounwind ssp noredzone {
entry:
br i1 %C, label %N, label %if.then
N:
%cmp = icmp ult i32 %x, 32
%cmp4 = icmp eq i8 %c, 97
%or.cond = or i1 %cmp, %cmp4
%cmp9 = icmp eq i8 %c, 99
%or.cond11 = or i1 %or.cond, %cmp9
br i1 %or.cond11, label %if.then, label %if.end
if.then: ; preds = %entry
%A = phi i32 [0, %entry], [42, %N]
tail call void @foo1() nounwind noredzone
ret i32 %A
if.end: ; preds = %entry
ret i32 0
; CHECK: @test8
; CHECK: switch.early.test:
; CHECK: switch i8 %c, label %if.end [
; CHECK: i8 99, label %if.then
; CHECK: i8 97, label %if.then
; CHECK: ]
; CHECK: %A = phi i32 [ 0, %entry ], [ 42, %switch.early.test ], [ 42, %N ], [ 42, %switch.early.test ]
}
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