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llvm-6502/test/Transforms/GVN/condprop.ll
Dan Gohman c1be92f3bb Make BasicAliasAnalysis a normal AliasAnalysis implementation which
does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.

Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.

Update tests to explicitly request -basicaa.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116720 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-18 18:04:47 +00:00

53 lines
1.3 KiB
LLVM

; RUN: opt < %s -basicaa -gvn -S | grep {br i1 false}
@a = external global i32 ; <i32*> [#uses=7]
define i32 @foo() nounwind {
entry:
%0 = load i32* @a, align 4 ; <i32> [#uses=1]
%1 = icmp eq i32 %0, 4 ; <i1> [#uses=1]
br i1 %1, label %bb, label %bb1
bb: ; preds = %entry
br label %bb8
bb1: ; preds = %entry
%2 = load i32* @a, align 4 ; <i32> [#uses=1]
%3 = icmp eq i32 %2, 5 ; <i1> [#uses=1]
br i1 %3, label %bb2, label %bb3
bb2: ; preds = %bb1
br label %bb8
bb3: ; preds = %bb1
%4 = load i32* @a, align 4 ; <i32> [#uses=1]
%5 = icmp eq i32 %4, 4 ; <i1> [#uses=1]
br i1 %5, label %bb4, label %bb5
bb4: ; preds = %bb3
%6 = load i32* @a, align 4 ; <i32> [#uses=1]
%7 = add i32 %6, 5 ; <i32> [#uses=1]
br label %bb8
bb5: ; preds = %bb3
%8 = load i32* @a, align 4 ; <i32> [#uses=1]
%9 = icmp eq i32 %8, 5 ; <i1> [#uses=1]
br i1 %9, label %bb6, label %bb7
bb6: ; preds = %bb5
%10 = load i32* @a, align 4 ; <i32> [#uses=1]
%11 = add i32 %10, 4 ; <i32> [#uses=1]
br label %bb8
bb7: ; preds = %bb5
%12 = load i32* @a, align 4 ; <i32> [#uses=1]
br label %bb8
bb8: ; preds = %bb7, %bb6, %bb4, %bb2, %bb
%.0 = phi i32 [ %12, %bb7 ], [ %11, %bb6 ], [ %7, %bb4 ], [ 4, %bb2 ], [ 5, %bb ] ; <i32> [#uses=1]
br label %return
return: ; preds = %bb8
ret i32 %.0
}