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llvm-project/clang/test/CodeGen/msp430-fp-elim.c

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Do not use frame pointer by default for MSP430 This is suggested by 3.3.9 of MSP430 EABI document. We do allow user to manually enable frame pointer. GCC toolchain uses the same behavior. Patch by Dmitry Mikushev! Differential Revision: https://reviews.llvm.org/D56925 llvm-svn: 353212
2019-02-06 04:15:03 +08:00
// REQUIRES: msp430-registered-target
[Clang] Replace cc1 options '-mdisable-fp-elim' and '-momit-leaf-frame-pointer' with '-mframe-pointer' After D56351 and D64294, frame pointer handling is migrated to tri-state (all, non-leaf, none) in clang driver and on the function attribute. This patch makes the frame pointer handling cc1 option tri-state. Reviewers: chandlerc, rnk, t.p.northover, MaskRay Reviewed By: MaskRay Differential Revision: https://reviews.llvm.org/D56353 llvm-svn: 366645
2019-07-21 06:50:50 +08:00
// RUN: %clang_cc1 -mframe-pointer=all -triple msp430 -S %s -o - | FileCheck %s --check-prefix=FP_ENFORCED
Do not use frame pointer by default for MSP430 This is suggested by 3.3.9 of MSP430 EABI document. We do allow user to manually enable frame pointer. GCC toolchain uses the same behavior. Patch by Dmitry Mikushev! Differential Revision: https://reviews.llvm.org/D56925 llvm-svn: 353212
2019-02-06 04:15:03 +08:00
// RUN: %clang_cc1 -triple msp430 -S %s -o - | FileCheck %s --check-prefix=FP_DEFAULT
// Check the frame pointer is not used on MSP430 by default, but can be forcibly turned on.
// FP_ENFORCED: push r4
// FP_ENFORCED: mov r4, r4
// FP_ENFORCED: pop r4
// FP_DEFAULT: .globl fp_elim_check
// FP_DEFAULT-NOT: push r4
// FP_DEFAULT: mov r4, r4
// FP_DEFAULT-NOT: pop r4
void fp_elim_check()
{
asm volatile ("mov r4, r4");
}