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Add a testcase for non-local CSE of read-only calls.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51025 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-05-13 08:17:44 +00:00
parent 3b3f58cb77
commit 6513c1bf90
1 changed files with 49 additions and 0 deletions
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test/Transforms/GVN/nonlocal-cse.ll Normal file
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; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep strlen | count 2
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9"
define i32 @test(i32 %g, i8* %P) nounwind {
entry:
%tmp2 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1]
%tmp3 = icmp eq i32 %tmp2, 100 ; <i1> [#uses=1]
%tmp34 = zext i1 %tmp3 to i8 ; <i8> [#uses=1]
%toBool = icmp ne i8 %tmp34, 0 ; <i1> [#uses=1]
br i1 %toBool, label %bb, label %bb6
bb: ; preds = %entry
br label %bb27
bb6: ; preds = %entry
%tmp8 = add i32 %g, 42 ; <i32> [#uses=2]
%tmp10 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1]
%tmp11 = icmp eq i32 %tmp10, 100 ; <i1> [#uses=1]
%tmp1112 = zext i1 %tmp11 to i8 ; <i8> [#uses=1]
%toBool13 = icmp ne i8 %tmp1112, 0 ; <i1> [#uses=1]
br i1 %toBool13, label %bb14, label %bb16
bb14: ; preds = %bb6
br label %bb27
bb16: ; preds = %bb6
%tmp18 = mul i32 %tmp8, 2 ; <i32> [#uses=1]
%tmp20 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1]
%tmp21 = icmp eq i32 %tmp20, 100 ; <i1> [#uses=1]
%tmp2122 = zext i1 %tmp21 to i8 ; <i8> [#uses=1]
%toBool23 = icmp ne i8 %tmp2122, 0 ; <i1> [#uses=1]
br i1 %toBool23, label %bb24, label %bb26
bb24: ; preds = %bb16
br label %bb27
bb26: ; preds = %bb16
br label %bb27
bb27: ; preds = %bb26, %bb24, %bb14, %bb
%tmp.0 = phi i32 [ 11, %bb26 ], [ %tmp18, %bb24 ], [ %tmp8, %bb14 ], [ %g, %bb ] ; <i32> [#uses=1]
br label %return
return: ; preds = %bb27
ret i32 %tmp.0
}
declare i32 @strlen(i8*) nounwind readonly