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Diffstat (limited to 'llvm/test/Transforms/JumpThreading/basic.ll')
| -rw-r--r-- | llvm/test/Transforms/JumpThreading/basic.ll | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/llvm/test/Transforms/JumpThreading/basic.ll b/llvm/test/Transforms/JumpThreading/basic.ll index 46c92bc1f57..95fa588dd13 100644 --- a/llvm/test/Transforms/JumpThreading/basic.ll +++ b/llvm/test/Transforms/JumpThreading/basic.ll @@ -476,6 +476,56 @@ 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 [1, %Entry], [%v1, %F1] + %M = icmp eq i32 %B, 0 + %M1 = zext i1 %M to i32 + %N = icmp eq i32 %M1, 1 + br i1 %N, label %T2, label %F2 + +; CHECK: Merge: +; CHECK-NOT: phi +; CHECK-NEXT: %v1 = call i32 @f1() + +T2: + %Q = zext i1 %M to i32 + ret i32 %Q + +F2: + ret i32 %B +; CHECK: F2: +; CHECK-NEXT: phi i32 +} + +;;; Just check that ComputeValueKnownInPredecessors() does not return true with +;;; no values and triggers the assert in ProcessThreadableEdges(). +define i32 @test17() { +entry: + %A = add i32 0, 1 + %B = icmp eq i32 %A, 0 + br i1 %B, label %T, label %F +T: + %v1 = call i32 @f1() + ret i32 %v1 +F: + %v2 = call i32 @f2() + ret i32 %v2 +} + ; In this test we check that block duplication is inhibited by the presence ; of a function with the 'noduplicate' attribute. |
