mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-22 12:08:33 +00:00
3e054fe9ef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81257 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
1.3 KiB
LLVM
42 lines
1.3 KiB
LLVM
; Test a bunch of cases where the cfg simplification code should
|
|
; be able to fold PHI nodes into computation in common cases. Folding the PHI
|
|
; nodes away allows the branches to be eliminated, performing a simple form of
|
|
; 'if conversion'.
|
|
|
|
; RUN: opt %s -simplifycfg -S > %t.xform
|
|
; RUN: not grep phi %t.xform
|
|
; RUN: grep ret %t.xform
|
|
|
|
declare void @use(i1)
|
|
|
|
declare void @use.upgrd.1(i32)
|
|
|
|
define void @test2(i1 %c, i1 %d, i32 %V, i32 %V2) {
|
|
; <label>:0
|
|
br i1 %d, label %X, label %F
|
|
X: ; preds = %0
|
|
br i1 %c, label %T, label %F
|
|
T: ; preds = %X
|
|
br label %F
|
|
F: ; preds = %T, %X, %0
|
|
%B1 = phi i1 [ true, %0 ], [ false, %T ], [ false, %X ] ; <i1> [#uses=1]
|
|
%I7 = phi i32 [ %V, %0 ], [ %V2, %T ], [ %V2, %X ] ; <i32> [#uses=1]
|
|
call void @use( i1 %B1 )
|
|
call void @use.upgrd.1( i32 %I7 )
|
|
ret void
|
|
}
|
|
|
|
define void @test(i1 %c, i32 %V, i32 %V2) {
|
|
; <label>:0
|
|
br i1 %c, label %T, label %F
|
|
T: ; preds = %0
|
|
br label %F
|
|
F: ; preds = %T, %0
|
|
%B1 = phi i1 [ true, %0 ], [ false, %T ] ; <i1> [#uses=1]
|
|
%I6 = phi i32 [ %V, %0 ], [ 0, %T ] ; <i32> [#uses=1]
|
|
call void @use( i1 %B1 )
|
|
call void @use.upgrd.1( i32 %I6 )
|
|
ret void
|
|
}
|
|
|