rust/tests/codegen/force-frame-pointers.rs

// compile-flags: -C no-prepopulate-passes -C force-frame-pointers=y

#![crate_type="lib"]

// CHECK: attributes #{{.*}} "frame-pointer"="all"
pub fn foo() {}
Rework force-frame-pointer This reworks the force-frame-pointer PR to explicitly only consider the value of the flag if it is provided, and use a target default otherwise. Something that was tried but not kept was renaming the flag to `frame-pointer`, because for flag `frame-pointer=no`, there is no guarante, that LLVM will elide all the frame pointers; oposite of what the literal reading of the flag would suggest. 2018-03-06 18:27:19 +00:00			`// compile-flags: -C no-prepopulate-passes -C force-frame-pointers=y`
Don't force-enable frame pointers when generating debug info We apparently used to generate bad/incomplete debug info causing debuggers not to find symbols of stack allocated variables. This was somehow worked around by having frame pointers. With the current codegen, this seems no longer necessary, so we can remove the code that force-enables frame pointers whenever debug info is requested. Since certain situations, like profiling code profit from having frame pointers, we add a -Cforce-frame-pointers flag to always enable frame pointers. Fixes #11906 2018-01-03 09:29:27 +00:00
			`#![crate_type="lib"]`

Use function attribute "frame-pointer" instead of "no-frame-pointer-elim" LLVM 8 (D56351) introduced "frame-pointer". In LLVM 10 (D71863), "no-frame-pointer-elim"/"no-frame-pointer-elim-non-leaf" will be ignored. 2019-12-31 05:35:13 +00:00			`// CHECK: attributes #{{.*}} "frame-pointer"="all"`
Don't force-enable frame pointers when generating debug info We apparently used to generate bad/incomplete debug info causing debuggers not to find symbols of stack allocated variables. This was somehow worked around by having frame pointers. With the current codegen, this seems no longer necessary, so we can remove the code that force-enables frame pointers whenever debug info is requested. Since certain situations, like profiling code profit from having frame pointers, we add a -Cforce-frame-pointers flag to always enable frame pointers. Fixes #11906 2018-01-03 09:29:27 +00:00			`pub fn foo() {}`