[clang] [FatLTO] output of -ffat-lto-objects -S should be assembly. (PR #79041)

[Wael Yehia via cfe-commits]

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@@ -12,14 +12,27 @@
 // CHECK-CC-S-NOT: -emit-llvm
 // CHECK-CC-S-NOT: -ffat-lto-objects
 
-/// When LTO is enabled, we expect LLVM IR output and -ffat-lto-objects to be passed to cc1.
+/// When fat LTO is enabled with -S, we expect asm output and -ffat-lto-objects to be passed to cc1.
 // RUN: %clang --target=x86_64-unknown-linux-gnu -flto -ffat-lto-objects -### %s -S 2>&1 | FileCheck %s -check-prefix=CHECK-CC-S-LTO
-// RUN: %clang --target=x86_64-unknown-linux-gnu -flto -ffat-lto-objects -### %s -S -emit-llvm 2>&1 | FileCheck %s -check-prefix=CHECK-CC-S-LTO
 // CHECK-CC-S-LTO: -cc1
 // CHECK-CC-S-LTO-SAME: -funified-lto
-// CHECK-CC-S-LTO-SAME: -emit-llvm
+// CHECK-CC-S-NOT: -emit-llvm
 // CHECK-CC-S-LTO-SAME: -ffat-lto-objects
 
+/// When fat LTO is enabled with -S and -emit-llvm, we expect IR output and -ffat-lto-objects to be passed to cc1.
+// RUN: %clang --target=x86_64-unknown-linux-gnu -flto -ffat-lto-objects -### %s -S -emit-llvm 2>&1 | FileCheck %s -check-prefix=CHECK-CC-S-EL-LTO
+// CHECK-CC-S-EL-LTO: -cc1
+// CHECK-CC-S-EL-LTO-SAME: -funified-lto
+// CHECK-CC-S-EL-LTO-SAME: -emit-llvm
+// CHECK-CC-S-EL-LTO-SAME: -ffat-lto-objects
+
+/// When fat LTO is enabled wihtout -S we expect native object output and -ffat-lto-object to be passed to cc1.
+// RUN: %clang --target=x86_64-unknown-linux-gnu -flto -ffat-lto-objects -### %s -c 2>&1 | FileCheck %s -check-prefix=CHECK-CC-C-LTO
+// CHECK-CC-C-LTO: -cc1
+// CHECK-CC-C-LTO: -funified-lto
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w2yehia wrote:

should these be CHECK-CC-C-LTO-SAME ?

https://github.com/llvm/llvm-project/pull/79041