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| author | Haicheng Wu <haicheng@codeaurora.org> | 2016-03-16 04:52:52 +0000 |
|---|---|---|
| committer | Haicheng Wu <haicheng@codeaurora.org> | 2016-03-16 04:52:52 +0000 |
| commit | 7873857a8893c17335de7693fea860bdc4b162f0 (patch) | |
| tree | 16a1d1889d9690f2493c3af1fc482ef614eb3426 /llvm/test/Transforms/JumpThreading/basic.ll | |
| parent | c9daaaedb67e1e0265f795f8a9cbad6bc9553883 (diff) | |
| download | bcm5719-llvm-7873857a8893c17335de7693fea860bdc4b162f0.tar.gz bcm5719-llvm-7873857a8893c17335de7693fea860bdc4b162f0.zip | |
[JumpThreading] See through Cast Instructions
To capture more jump-thread opportunity.
llvm-svn: 263618
Diffstat (limited to 'llvm/test/Transforms/JumpThreading/basic.ll')
| -rw-r--r-- | llvm/test/Transforms/JumpThreading/basic.ll | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/llvm/test/Transforms/JumpThreading/basic.ll b/llvm/test/Transforms/JumpThreading/basic.ll index 46c92bc1f57..14cd1fbe1c8 100644 --- a/llvm/test/Transforms/JumpThreading/basic.ll +++ b/llvm/test/Transforms/JumpThreading/basic.ll @@ -476,6 +476,40 @@ exit1: ; CHECK: } } +;;; Verify that we can handle constraint propagation through cast. +define i32 @test16(i1 %cond) { +Entry: +; CHECK-LABEL: @test16( + br i1 %cond, label %Merge, label %F1 + +; CHECK: Entry: +; CHECK-NEXT: br i1 %cond, label %F2, label %Merge + +F1: + %v1 = call i32 @f1() + br label %Merge + +Merge: + %B = phi i32 [0, %Entry], [%v1, %F1] + %M = icmp eq i32 %B, 0 + %M1 = zext i1 %M to i32 + %N = icmp eq i32 %M1, 0 + br i1 %N, label %T2, label %F2 + +; CHECK: Merge: +; CHECK-NOT: phi +; CHECK-NEXT: %v1 = call i32 @f1() + +T2: + %Q = call i32 @f2() + ret i32 %Q + +F2: + ret i32 %B +; CHECK: F2: +; CHECK-NEXT: phi i32 +} + ; In this test we check that block duplication is inhibited by the presence ; of a function with the 'noduplicate' attribute. |
