[flang-commits] [clang] [flang] [flang] Add -f[no-]unroll-loops flag (PR #122906)

[LLVM Continuous Integration via flang-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-flang-rhel-clang` running on `ppc64le-flang-rhel-test` while building `clang,flang` at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/17336

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

```
Step 6 (test-build-unified-tree-check-flang) failure: test (failure)
******************** TEST 'Flang :: HLFIR/unroll-loops.fir' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -fc1 -emit-llvm -O1 -funroll-loops -mllvm -force-vector-width=2 -o- /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/HLFIR/unroll-loops.fir | /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/FileCheck /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/HLFIR/unroll-loops.fir --check-prefixes=CHECK,UNROLL
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -fc1 -emit-llvm -O1 -funroll-loops -mllvm -force-vector-width=2 -o- /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/HLFIR/unroll-loops.fir
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/FileCheck /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/HLFIR/unroll-loops.fir --check-prefixes=CHECK,UNROLL
warning: overriding the module target triple with powerpc64le-unknown-linux-gnu [-Woverride-module]
/home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/HLFIR/unroll-loops.fir:26:18: error: UNROLL-NEXT: is not on the line after the previous match
 // UNROLL-NEXT: %[[GEP0:.*]] = getelementptr i64, ptr %[[ARG0]], i64 %[[IND]]
                 ^
<stdin>:21:2: note: 'next' match was here
 %1 = getelementptr i64, ptr %0, i64 %index
 ^
<stdin>:14:51: note: previous match ended here
 %step.add = add <2 x i64> %vec.ind, splat (i64 2)
                                                  ^
<stdin>:15:1: note: non-matching line after previous match is here
 %step.add.2 = add <2 x i64> %vec.ind, splat (i64 4)
^

Input file: <stdin>
Check file: /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/HLFIR/unroll-loops.fir

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

Input was:
<<<<<<
         .
         .
         .
        16:  %step.add.3 = add <2 x i64> %vec.ind, splat (i64 6) 
        17:  %step.add.4 = add <2 x i64> %vec.ind, splat (i64 8) 
        18:  %step.add.5 = add <2 x i64> %vec.ind, splat (i64 10) 
        19:  %step.add.6 = add <2 x i64> %vec.ind, splat (i64 12) 
        20:  %step.add.7 = add <2 x i64> %vec.ind, splat (i64 14) 
        21:  %1 = getelementptr i64, ptr %0, i64 %index 
next:26      !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  error: match on wrong line
        22:  %2 = getelementptr i8, ptr %1, i64 16 
        23:  %3 = getelementptr i8, ptr %1, i64 32 
        24:  %4 = getelementptr i8, ptr %1, i64 48 
        25:  %5 = getelementptr i8, ptr %1, i64 64 
        26:  %6 = getelementptr i8, ptr %1, i64 80 
         .
         .
         .
>>>>>>

--
...

```

</details>

https://github.com/llvm/llvm-project/pull/122906