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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:58 +0000 |
commit | a4b7ed7a42c716ab9f05e351f003d589124fd55d (patch) | |
tree | b620cd3f223850b28716e474e80c58059dca5dd4 /tests/codegen/non-terminate/nonempty-infinite-loop.rs | |
parent | Adding upstream version 1.67.1+dfsg1. (diff) | |
download | rustc-a4b7ed7a42c716ab9f05e351f003d589124fd55d.tar.xz rustc-a4b7ed7a42c716ab9f05e351f003d589124fd55d.zip |
Adding upstream version 1.68.2+dfsg1.upstream/1.68.2+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/codegen/non-terminate/nonempty-infinite-loop.rs')
-rw-r--r-- | tests/codegen/non-terminate/nonempty-infinite-loop.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/codegen/non-terminate/nonempty-infinite-loop.rs b/tests/codegen/non-terminate/nonempty-infinite-loop.rs new file mode 100644 index 000000000..5e25e04fc --- /dev/null +++ b/tests/codegen/non-terminate/nonempty-infinite-loop.rs @@ -0,0 +1,28 @@ +// compile-flags: -C opt-level=3 + +#![crate_type = "lib"] + +// Verify that we don't miscompile this even if rustc didn't apply the trivial loop detection to +// insert the sideeffect intrinsic. + +fn infinite_loop() -> u8 { + let mut x = 0; + // CHECK-NOT: sideeffect + loop { + if x == 42 { + x = 0; + } else { + x = 42; + } + } +} + +// CHECK-LABEL: @test +#[no_mangle] +fn test() -> u8 { + // CHECK-NOT: unreachable + // CHECK: br label %{{.+}} + // CHECK-NOT: unreachable + let x = infinite_loop(); + x +} |