diff options
Diffstat (limited to 'test/Transforms/SROA/phi-and-select.ll')
| -rw-r--r-- | test/Transforms/SROA/phi-and-select.ll | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/test/Transforms/SROA/phi-and-select.ll b/test/Transforms/SROA/phi-and-select.ll index 921016a9c2..b9931800e7 100644 --- a/test/Transforms/SROA/phi-and-select.ll +++ b/test/Transforms/SROA/phi-and-select.ll @@ -396,9 +396,10 @@ define i64 @PR14132(i1 %flag) { ; Here we form a PHI-node by promoting the pointer alloca first, and then in ; order to promote the other two allocas, we speculate the load of the ; now-phi-node-pointer. In doing so we end up loading a 64-bit value from an i8 -; alloca, which is completely bogus. However, we were asserting on trying to -; rewrite it. Now it is replaced with undef. Eventually we may replace it with -; unrechable and even the CFG will go away here. +; alloca. While this is a bit dubious, we were asserting on trying to +; rewrite it. The trick is that the code using the value may carefully take +; steps to only use the not-undef bits, and so we need to at least loosely +; support this.. entry: %a = alloca i64 %b = alloca i8 @@ -414,13 +415,14 @@ entry: if.then: store i8* %b, i8** %ptr.cast br label %if.end +; CHECK-NOT: store +; CHECK: %[[ext:.*]] = zext i8 1 to i64 if.end: %tmp = load i64** %ptr %result = load i64* %tmp -; CHECK-NOT: store ; CHECK-NOT: load -; CHECK: %[[result:.*]] = phi i64 [ undef, %if.then ], [ 0, %entry ] +; CHECK: %[[result:.*]] = phi i64 [ %[[ext]], %if.then ], [ 0, %entry ] ret i64 %result ; CHECK-NEXT: ret i64 %[[result]] |