70a5c52534
Currently the a AAPCS compliant frame record is not always created for functions when it should. Although a consistent frame record might not be required in some cases, there are still scenarios where applications may want to make use of the call hierarchy made available trough it. In order to enable the use of AAPCS compliant frame records whilst keep backwards compatibility, this patch introduces a new command-line option (`-mframe-chain=[none|aapcs|aapcs+leaf]`) for Aarch32 and Thumb backends. The option allows users to explicitly select when to use it, and is also useful to ensure the extra overhead introduced by the frame records is only introduced when necessary, in particular for Thumb targets. Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D125094
26 lines
1.8 KiB
LLVM
26 lines
1.8 KiB
LLVM
; RUN: not llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=all 2>&1 | FileCheck %s --check-prefix=RESERVED-R11
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; RUN: not llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=all -mattr=+aapcs-frame-chain 2>&1 | FileCheck %s --check-prefix=RESERVED-R11
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; RUN: not llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=all -mattr=+aapcs-frame-chain-leaf 2>&1 | FileCheck %s --check-prefix=RESERVED-R11
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; RUN: llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=non-leaf 2>&1 | FileCheck %s --check-prefix=RESERVED-NONE
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; RUN: not llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=non-leaf -mattr=+aapcs-frame-chain 2>&1 | FileCheck %s --check-prefix=RESERVED-R11
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; RUN: not llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=non-leaf -mattr=+aapcs-frame-chain-leaf 2>&1 | FileCheck %s --check-prefix=RESERVED-R11
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; RUN: llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=none 2>&1 | FileCheck %s --check-prefix=RESERVED-NONE
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; RUN: not llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=none -mattr=+aapcs-frame-chain 2>&1 | FileCheck %s --check-prefix=RESERVED-R11
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; RUN: not llc -mtriple arm-arm-none-eabi -filetype asm -o - %s -frame-pointer=none -mattr=+aapcs-frame-chain-leaf 2>&1 | FileCheck %s --check-prefix=RESERVED-R11
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declare void @leaf(i32 %input)
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define void @reserved_r7(i32 %input) {
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; RESERVED-NONE-NOT: error: write to reserved register 'R7'
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; RESERVED-R11-NOT: error: write to reserved register 'R7'
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%1 = call i32 asm sideeffect "mov $0, $1", "={r7},r"(i32 %input)
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ret void
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}
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define void @reserved_r11(i32 %input) {
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; RESERVED-NONE-NOT: error: write to reserved register 'R11'
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; RESERVED-R11: error: write to reserved register 'R11'
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%1 = call i32 asm sideeffect "mov $0, $1", "={r11},r"(i32 %input)
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ret void
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}
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