[clang] [llvm] [Driver] Reject -mcmodel=tiny on X86 (PR #125643)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `premerge-monolithic-linux` running on `premerge-linux-1` while building `clang` at step 7 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/153/builds/31001

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 7 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'Flang :: Driver/mcmodel.f90' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
not /build/buildbot/premerge-monolithic-linux/build/bin/flang -### -c --target=i686 -mcmodel=medium /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90 2>&1 | /build/buildbot/premerge-monolithic-linux/build/bin/FileCheck --check-prefix=ERR-MEDIUM /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90 # RUN: at line 1
+ not /build/buildbot/premerge-monolithic-linux/build/bin/flang -### -c --target=i686 -mcmodel=medium /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90
+ /build/buildbot/premerge-monolithic-linux/build/bin/FileCheck --check-prefix=ERR-MEDIUM /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90
/build/buildbot/premerge-monolithic-linux/build/bin/flang --target=x86_64 -### -c -mcmodel=tiny /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90 2>&1 | /build/buildbot/premerge-monolithic-linux/build/bin/FileCheck --check-prefix=TINY /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90 # RUN: at line 2
+ /build/buildbot/premerge-monolithic-linux/build/bin/flang --target=x86_64 -### -c -mcmodel=tiny /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90
+ /build/buildbot/premerge-monolithic-linux/build/bin/FileCheck --check-prefix=TINY /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90
/build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90:27:9: error: TINY: expected string not found in input
! TINY: "-mcmodel=tiny"
        ^
<stdin>:1:1: note: scanning from here
flang version 21.0.0git (https://github.com/llvm/llvm-project.git c53e583007738f591d0c9993f06b65c4898a04f8)
^
<stdin>:6:56: note: possible intended match here
flang-21: error: unsupported argument 'tiny' to option '-mcmodel=' for target 'x86_64'
                                                       ^

Input file: <stdin>
Check file: /build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90

-dump-input=help explains the following input dump.

Input was:
<<<<<<
            1: flang version 21.0.0git (https://github.com/llvm/llvm-project.git c53e583007738f591d0c9993f06b65c4898a04f8) 
check:27'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
            2: Target: x86_64 
check:27'0     ~~~~~~~~~~~~~~~
            3: Thread model: posix 
check:27'0     ~~~~~~~~~~~~~~~~~~~~
            4: InstalledDir: /build/buildbot/premerge-monolithic-linux/build/bin 
check:27'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            5: Build config: +assertions 
check:27'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~
            6: flang-21: error: unsupported argument 'tiny' to option '-mcmodel=' for target 'x86_64' 
check:27'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:27'1                                                            ?                                possible intended match
            7:  "/build/buildbot/premerge-monolithic-linux/build/bin/flang" "-fc1" "-triple" "x86_64" "-emit-obj" "-mrelocation-model" "static" "-target-cpu" "x86-64" "-resource-dir" "/build/buildbot/premerge-monolithic-linux/build/lib/clang/21" "-mframe-pointer=all" "-o" "mcmodel.o" "-x" "f95" "/build/buildbot/premerge-monolithic-linux/llvm-project/flang/test/Driver/mcmodel.f90" 
check:27'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>>>>

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/125643