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57 lines
1.3 KiB
Rust
57 lines
1.3 KiB
Rust
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//@ compile-flags: -C no-prepopulate-passes
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#![crate_type = "lib"]
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#![feature(core_intrinsics)]
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use std::intrinsics::{ctlz, ctlz_nonzero};
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// CHECK-LABEL: @ctlz_u16
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#[no_mangle]
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pub unsafe fn ctlz_u16(x: u16) -> u32 {
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// CHECK: %[[tmp:.*]] = call i16 @llvm.ctlz.i16(i16 %x, i1 false)
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// CHECK: zext i16 %[[tmp]] to i32
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ctlz(x)
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}
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// CHECK-LABEL: @ctlz_nzu16
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#[no_mangle]
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pub unsafe fn ctlz_nzu16(x: u16) -> u32 {
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// CHECK: %[[tmp:.*]] = call i16 @llvm.ctlz.i16(i16 %x, i1 true)
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// CHECK: zext i16 %[[tmp]] to i32
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ctlz_nonzero(x)
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}
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// CHECK-LABEL: @ctlz_u32
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#[no_mangle]
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pub unsafe fn ctlz_u32(x: u32) -> u32 {
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// CHECK: call i32 @llvm.ctlz.i32(i32 %x, i1 false)
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// CHECK-NOT: zext
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// CHECK-NOT: trunc
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ctlz(x)
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}
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// CHECK-LABEL: @ctlz_nzu32
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#[no_mangle]
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pub unsafe fn ctlz_nzu32(x: u32) -> u32 {
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// CHECK: call i32 @llvm.ctlz.i32(i32 %x, i1 true)
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// CHECK-NOT: zext
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// CHECK-NOT: trunc
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ctlz_nonzero(x)
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}
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// CHECK-LABEL: @ctlz_u64
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#[no_mangle]
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pub unsafe fn ctlz_u64(x: u64) -> u32 {
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// CHECK: %[[tmp:.*]] = call i64 @llvm.ctlz.i64(i64 %x, i1 false)
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// CHECK: trunc i64 %[[tmp]] to i32
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ctlz(x)
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}
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// CHECK-LABEL: @ctlz_nzu64
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#[no_mangle]
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pub unsafe fn ctlz_nzu64(x: u64) -> u32 {
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// CHECK: %[[tmp:.*]] = call i64 @llvm.ctlz.i64(i64 %x, i1 true)
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// CHECK: trunc i64 %[[tmp]] to i32
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ctlz_nonzero(x)
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}
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