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Add regression test for #75525 #82799

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Merged
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Mar 9, 2021
+27 −0
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Add regression test for #75525 #82799

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27 changes: 27 additions & 0 deletions src/test/codegen/issue-75525-bounds-checks.rs
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Original file line number Diff line number Diff line change
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// Regression test for #75525, verifies that no bounds checks are generated.

// min-llvm-version: 12.0.0
// compile-flags: -O

#![crate_type = "lib"]

// CHECK-LABEL: @f0
// CHECK-NOT: panic
#[no_mangle]
pub fn f0(idx: usize, buf: &[u8; 10]) -> u8 {
if idx < 8 { buf[idx + 1] } else { 0 }
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NB: This test case does not appear to have generated a bounds check before 12.0.

}

// CHECK-LABEL: @f1
// CHECK-NOT: panic
#[no_mangle]
pub fn f1(idx: usize, buf: &[u8; 10]) -> u8 {
if idx > 5 && idx < 8 { buf[idx - 1] } else { 0 }
}

// CHECK-LABEL: @f2
// CHECK-NOT: panic
#[no_mangle]
pub fn f2(idx: usize, buf: &[u8; 10]) -> u8 {
if idx > 5 && idx < 8 { buf[idx] } else { 0 }
}