[llvm] [RISCV][GISel] Support f32/f64 ldexp. (PR #117941)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-expensive-checks-debian` running on `gribozavr4` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/16/builds/9923

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: tools/llvm-cov/branch-export-lcov-unify-instances.test' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llvm-profdata merge /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/Inputs/branch-templates.proftext -o /b/1/llvm-clang-x86_64-expensive-checks-debian/build/test/tools/llvm-cov/Output/branch-export-lcov-unify-instances.test.tmp.profdata
+ /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llvm-profdata merge /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/Inputs/branch-templates.proftext -o /b/1/llvm-clang-x86_64-expensive-checks-debian/build/test/tools/llvm-cov/Output/branch-export-lcov-unify-instances.test.tmp.profdata
RUN: at line 3: /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llvm-cov export --format=lcov --unify-instantiations=true /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/Inputs/branch-templates.o32l -instr-profile /b/1/llvm-clang-x86_64-expensive-checks-debian/build/test/tools/llvm-cov/Output/branch-export-lcov-unify-instances.test.tmp.profdata | /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/FileCheck /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/branch-export-lcov-unify-instances.test -check-prefix=UNIFY
+ /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llvm-cov export --format=lcov --unify-instantiations=true /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/Inputs/branch-templates.o32l -instr-profile /b/1/llvm-clang-x86_64-expensive-checks-debian/build/test/tools/llvm-cov/Output/branch-export-lcov-unify-instances.test.tmp.profdata
+ /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/FileCheck /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/branch-export-lcov-unify-instances.test -check-prefix=UNIFY
RUN: at line 19: /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llvm-profdata merge /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/Inputs/branch-templates.proftext -o /b/1/llvm-clang-x86_64-expensive-checks-debian/build/test/tools/llvm-cov/Output/branch-export-lcov-unify-instances.test.tmp.profdata
+ /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llvm-profdata merge /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/Inputs/branch-templates.proftext -o /b/1/llvm-clang-x86_64-expensive-checks-debian/build/test/tools/llvm-cov/Output/branch-export-lcov-unify-instances.test.tmp.profdata
RUN: at line 20: /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llvm-cov export --format=lcov --unify-instantiations=false /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/Inputs/branch-templates.o32l -instr-profile /b/1/llvm-clang-x86_64-expensive-checks-debian/build/test/tools/llvm-cov/Output/branch-export-lcov-unify-instances.test.tmp.profdata | /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/FileCheck /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/branch-export-lcov-unify-instances.test
+ /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llvm-cov export --format=lcov --unify-instantiations=false /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/Inputs/branch-templates.o32l -instr-profile /b/1/llvm-clang-x86_64-expensive-checks-debian/build/test/tools/llvm-cov/Output/branch-export-lcov-unify-instances.test.tmp.profdata
+ /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/FileCheck /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/branch-export-lcov-unify-instances.test
/b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/branch-export-lcov-unify-instances.test:24:15: error: CHECK-DAG: expected string not found in input
// CHECK-DAG: BRDA:14,1,2,1
              ^
<stdin>:1:1: note: scanning from here
SF:/tmp/branch-templates.cpp
^
<stdin>:31:1: note: possible intended match here
BRDA:14,1,2,0
^

Input file: <stdin>
Check file: /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/tools/llvm-cov/branch-export-lcov-unify-instances.test

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

Input was:
<<<<<<
          1: SF:/tmp/branch-templates.cpp 
dag:24'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
          2: FN:29,main 
dag:24'0     ~~~~~~~~~~~
          3: FN:13,_Z4funcIiEiT_ 
dag:24'0     ~~~~~~~~~~~~~~~~~~~~
          4: FN:13,_Z4funcIbEiT_ 
dag:24'0     ~~~~~~~~~~~~~~~~~~~~
          5: FN:13,_Z4funcIfEiT_ 
dag:24'0     ~~~~~~~~~~~~~~~~~~~~
          6: FNDA:1,main 
dag:24'0     ~~~~~~~~~~~~
          .
          .
          .
         26: DA:36,1 
dag:24'0     ~~~~~~~~
         27: DA:37,1 
...

```

</details>

https://github.com/llvm/llvm-project/pull/117941