[llvm-branch-commits] [clang] [ConstantTime][Clang] Add __builtin_ct_select for constant-time selection (PR #166703)

[via llvm-branch-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 88045 tests passed
* 1589 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### Clang
<details>
<summary>Clang.CodeGen/builtin-ct-select.c</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang -cc1 -internal-isystem /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/23/include -nostdsysteminc -emit-llvm -o - /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang -cc1 -internal-isystem /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/23/include -nostdsysteminc -emit-llvm -o - /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c:5:17: error: CHECK-LABEL: expected string not found in input
# | // CHECK-LABEL: define i32 @test_int(
# |                 ^
# | <stdin>:1:1: note: scanning from here
# | ; ModuleID = '/home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c'
# | ^
# | <stdin>:9:11: note: possible intended match here
# | define dso_local i32 @test_int(i32 noundef %cond, i32 noundef %a, i32 noundef %b) #0 {
# |           ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |            1: ; ModuleID = '/home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c' 
# | label:5'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |            2: source_filename = "/home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGen/builtin-ct-select.c" 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            3: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128" 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            4: target triple = "x86_64-unknown-linux-gnu" 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            5:  
# | label:5'0     ~
# |            6: @global_volatile = global i32 42, align 4 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            7:  
# | label:5'0     ~
# |            8: ; Function Attrs: noinline nounwind optnone 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            9: define dso_local i32 @test_int(i32 noundef %cond, i32 noundef %a, i32 noundef %b) #0 { 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | label:5'1               ?                                                                             possible intended match
# |           10: entry: 
# | label:5'0     ~~~~~~~
# |           11:  %cond.addr = alloca i32, align 4 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           12:  %a.addr = alloca i32, align 4 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           13:  %b.addr = alloca i32, align 4 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           14:  store i32 %cond, ptr %cond.addr, align 4 
# | label:5'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            .
# |            .
# |            .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/166703