diff options
Diffstat (limited to 'test/CodeGen/X86/block-placement.ll')
| -rw-r--r-- | test/CodeGen/X86/block-placement.ll | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/test/CodeGen/X86/block-placement.ll b/test/CodeGen/X86/block-placement.ll index f3c9727605..9359fb8c12 100644 --- a/test/CodeGen/X86/block-placement.ll +++ b/test/CodeGen/X86/block-placement.ll @@ -122,14 +122,14 @@ define i32 @test_loop_early_exits(i32 %i, i32* %a) { ; Check that we sink early exit blocks out of loop bodies. ; CHECK: test_loop_early_exits: ; CHECK: %entry +; CHECK: %body1 ; CHECK: %body2 ; CHECK: %body3 ; CHECK: %body4 -; CHECK: %body1 +; CHECK: %exit ; CHECK: %bail1 ; CHECK: %bail2 ; CHECK: %bail3 -; CHECK: %exit entry: br label %body1 @@ -199,6 +199,36 @@ exit: ret i32 %base } +define i32 @test_no_loop_rotate(i32 %i, i32* %a) { +; Check that we don't try to rotate a loop which is already laid out with +; fallthrough opportunities into the top and out of the bottom. +; CHECK: test_no_loop_rotate: +; CHECK: %entry +; CHECK: %body0 +; CHECK: %body1 +; CHECK: %exit + +entry: + br label %body0 + +body0: + %iv = phi i32 [ 0, %entry ], [ %next, %body1 ] + %base = phi i32 [ 0, %entry ], [ %sum, %body1 ] + %arrayidx = getelementptr inbounds i32* %a, i32 %iv + %0 = load i32* %arrayidx + %sum = add nsw i32 %0, %base + %bailcond1 = icmp eq i32 %sum, 42 + br i1 %bailcond1, label %exit, label %body1 + +body1: + %next = add i32 %iv, 1 + %exitcond = icmp eq i32 %next, %i + br i1 %exitcond, label %exit, label %body0 + +exit: + ret i32 %base +} + define void @test_loop_rotate_reversed_blocks() { ; This test case (greatly reduced from an Olden bencmark) ensures that the loop ; rotate implementation doesn't assume that loops are laid out in a particular |