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| author | Guillaume Gomez <guillaume1.gomez@gmail.com> | 2025-07-21 14:34:12 +0200 |
|---|---|---|
| committer | Guillaume Gomez <guillaume1.gomez@gmail.com> | 2025-07-22 14:28:48 +0200 |
| commit | a27f3e3fd1e4d16160f8885b6b06665b5319f56c (patch) | |
| tree | b033935392cbadf6f85d2dbddf433a88e323aeeb /tests/codegen-llvm/checked_ilog.rs | |
| parent | ed93c1783b404d728d4809973a0550eb33cd293f (diff) | |
| download | rust-a27f3e3fd1e4d16160f8885b6b06665b5319f56c.tar.gz rust-a27f3e3fd1e4d16160f8885b6b06665b5319f56c.zip | |
Rename `tests/codegen` into `tests/codegen-llvm`
Diffstat (limited to 'tests/codegen-llvm/checked_ilog.rs')
| -rw-r--r-- | tests/codegen-llvm/checked_ilog.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tests/codegen-llvm/checked_ilog.rs b/tests/codegen-llvm/checked_ilog.rs new file mode 100644 index 00000000000..e340a45b6a9 --- /dev/null +++ b/tests/codegen-llvm/checked_ilog.rs @@ -0,0 +1,20 @@ +//@ compile-flags: -Copt-level=3 + +#![crate_type = "lib"] + +// Ensure that when val < base, we do not divide or multiply. + +// CHECK-LABEL: @checked_ilog +// CHECK-SAME: (i16{{.*}} %val, i16{{.*}} %base) +#[no_mangle] +pub fn checked_ilog(val: u16, base: u16) -> Option<u32> { + // CHECK-NOT: udiv + // CHECK-NOT: mul + // CHECK: %[[IS_LESS:.+]] = icmp ult i16 %val, %base + // CHECK-NEXT: br i1 %[[IS_LESS]], label %[[TRUE:.+]], label %[[FALSE:.+]] + // CHECK: [[TRUE]]: + // CHECK-NOT: udiv + // CHECK-NOT: mul + // CHECK: ret { i32, i32 } + val.checked_ilog(base) +} |