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New feature testcase for simplifycfg.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11306 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-11 03:35:04 +00:00
parent 82a5ff4c54
commit 54636af39d
1 changed files with 35 additions and 0 deletions

35
test/Transforms/SimplifyCFG/PhiEliminate.ll Normal file

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; 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: llvm-as < %s | opt -simplifycfg | llvm-dis > Output/%s.xform
; RUN: not grep phi Output/%s.xform && grep ret Output/%s.xform
declare void %use(bool)
declare void %use(int)
void %test(bool %c, int %V) {
br bool %c, label %T, label %F
T:
br label %F
F:
%B1 = phi bool [true, %0], [false, %T]
%B2 = phi bool [true, %T], [false, %0]
%I1 = phi int [1, %T], [0, %0]
%I2 = phi int [1, %0], [0, %T]
%I3 = phi int [17, %T], [0, %0]
%I4 = phi int [17, %T], [5, %0]
%I5 = phi int [%V, %T], [0, %0]
%I6 = phi int [%V, %0], [0, %T]
call void %use(bool %B1)
call void %use(bool %B2)
call void %use(int %I1)
call void %use(int %I2)
call void %use(int %I3)
call void %use(int %I4)
call void %use(int %I5)
call void %use(int %I6)
ret void
}