Use -fprofile-use= when TEST_SUITE_USE_IR_PGO is enabled

`TEST_SUITE_USE_IR_PGO` changes the test-suite to use
`-fprofile-generate=xxx` (instead of `-fprofile-instr-gen=xxx`). This
changes cmake to also use `-fprofile-use=xxx` (instead of
`-fprofile-instr-use=xxx`).

This change is cosmetic: It turns out `-fprofile-instr-use` does
automatically detect the profile format used and works either way. But
picking the matching use-flag can avoid confusion for people inspecting
the compiler flags.

Differential Revision: https://reviews.llvm.org/D134199

Author: MatzeB

cmake/modules/TestSuite.cmake

@@ -54,8 +54,13 @@ function(llvm_test_executable_no_test target)
   append_target_flags(LINK_LIBRARIES ${target} ${LDFLAGS})
   set(target_path ${CMAKE_CURRENT_BINARY_DIR}/${target})
   if(TEST_SUITE_PROFILE_USE)
-    append_target_flags(COMPILE_FLAGS ${target} -fprofile-instr-use=${target_path}.profdata)
-    append_target_flags(LINK_LIBRARIES ${target} -fprofile-instr-use=${target_path}.profdata)
+    if(TEST_SUITE_USE_IR_PGO)
+      append_target_flags(COMPILE_FLAGS ${target} -fprofile-use=${TEST_SUITE_PROFILE_PATH}/${target}.profdata)
+      append_target_flags(LINK_LIBRARIES ${target} -fprofile-use=${TEST_SUITE_PROFILE_PATH}/${target}.profdata)
+    else()
+      append_target_flags(COMPILE_FLAGS ${target} -fprofile-instr-use=${TEST_SUITE_PROFILE_PATH}/${target}.profdata)
+      append_target_flags(LINK_LIBRARIES ${target} -fprofile-instr-use=${TEST_SUITE_PROFILE_PATH}/${target}.profdata)
+    endif()
   endif()
 
   llvm_codesign(${target})