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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
commit | 631cd5845e8de329d0e227aaa707d7ea228b8f8f (patch) | |
tree | a1b87c8f8cad01cf18f7c5f57a08f102771ed303 /tests/codegen/issues/issue-77812.rs | |
parent | Adding debian version 1.69.0+dfsg1-1. (diff) | |
download | rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.tar.xz rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.zip |
Merging upstream version 1.70.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/codegen/issues/issue-77812.rs')
-rw-r--r-- | tests/codegen/issues/issue-77812.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tests/codegen/issues/issue-77812.rs b/tests/codegen/issues/issue-77812.rs new file mode 100644 index 000000000..4cc824145 --- /dev/null +++ b/tests/codegen/issues/issue-77812.rs @@ -0,0 +1,32 @@ +// compile-flags: -O +#![crate_type = "lib"] + +// Test that LLVM can eliminate the unreachable `Variant::Zero` branch. + +#[derive(Copy, Clone, Eq, PartialEq)] +pub enum Variant { + Zero, + One, + Two, +} + +extern { + fn exf1(); + fn exf2(); +} + +pub static mut GLOBAL: Variant = Variant::Zero; + +// CHECK-LABEL: @issue_77812 +#[no_mangle] +pub unsafe fn issue_77812() { + let g = GLOBAL; + if g != Variant::Zero { + match g { + Variant::One => exf1(), + Variant::Two => exf2(), + // CHECK-NOT: panic + Variant::Zero => panic!(), + } + } +} |