derek.holloway
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146 lines
3.3 KiB
ArmAsm
146 lines
3.3 KiB
ArmAsm
## Check that LDR relaxation will fail since LDR is inside a non-simple
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## function and there is no NOP next to it.
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# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown \
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# RUN: --defsym FAIL=1 %s -o %t.o
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# RUN: %clang %cflags %t.o -o %t.so -Wl,-q
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# RUN: not llvm-bolt %t.so -o %t.bolt 2>&1 | FileCheck %s --check-prefix=FAIL
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# FAIL: BOLT-ERROR: cannot relax LDR in non-simple function _start
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.ifdef FAIL
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.text
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.global _start
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.type _start, %function
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_start:
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.cfi_startproc
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br x2
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ldr x0, _foo
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ret
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.cfi_endproc
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.size _start, .-_start
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.endif
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## Check that LDR relaxation is not needed since the reference is not far away.
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# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown \
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# RUN: --defsym NOT_NEEDED=1 %s -o %t.o
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# RUN: %clang %cflags %t.o -o %t.so -Wl,-q
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# RUN: llvm-bolt %t.so -o %t.bolt
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# RUN: llvm-objdump -d %t.bolt | FileCheck %s --check-prefix=NOT_NEEDED
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# NOT_NEEDED: <_start>
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# NOT_NEEDED-NEXT: ldr
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.ifdef NOT_NEEDED
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.text
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.global _start
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.type _start, %function
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_start:
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.cfi_startproc
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ldr x0, _start
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ret
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.cfi_endproc
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.size _start, .-_start
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.endif
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## Check that LDR relaxation is done in a simple function, where NOP will
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## be inserted as needed.
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# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown \
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# RUN: --defsym RELAX_SIMPLE=1 %s -o %t.o
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# RUN: %clang %cflags %t.o -o %t.so -Wl,-q
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# RUN: llvm-bolt %t.so -o %t.bolt
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# RUN: llvm-objdump -d %t.bolt | FileCheck %s --check-prefix=RELAX
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# RELAX: adrp
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# RELAX-NEXT: ldr
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.ifdef RELAX_SIMPLE
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.text
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.global _start
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.type _start, %function
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_start:
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.cfi_startproc
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ldr x0, _foo
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ret
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.cfi_endproc
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.size _start, .-_start
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.endif
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## Check that LDR relaxation is done in a non-simple function, where NOP
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## exists next to LDR.
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# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown \
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# RUN: --defsym RELAX_NON_SIMPLE=1 %s -o %t.o
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# RUN: %clang %cflags %t.o -o %t.so -Wl,-q
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# RUN: llvm-bolt %t.so -o %t.bolt
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# RUN: llvm-objdump -d %t.bolt | FileCheck %s --check-prefix=RELAX
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.ifdef RELAX_NON_SIMPLE
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.text
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.global _start
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.type _start, %function
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_start:
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.cfi_startproc
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br x2
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ldr x0, _foo
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nop
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ret
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.cfi_endproc
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.size _start, .-_start
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.endif
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## Check LDR relaxation works on loading W (low 32-bit of X) registers.
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# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown \
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# RUN: --defsym RELAX_SIMPLE_WREG=1 %s -o %t.o
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# RUN: %clang %cflags %t.o -o %t.so -Wl,-q
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# RUN: llvm-bolt %t.so -o %t.bolt
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# RUN: llvm-objdump -d %t.bolt | FileCheck %s --check-prefix=RELAXW
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# RELAXW: adrp x0
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# RELAXW-NEXT: ldr w0
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.ifdef RELAX_SIMPLE_WREG
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.text
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.global _start
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.type _start, %function
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_start:
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.cfi_startproc
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ldr w0, _foo
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ret
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.cfi_endproc
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.size _start, .-_start
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.endif
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## Check LDR relaxation works on LDRSW (literal)
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# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown \
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# RUN: --defsym RELAX_SIMPLE_LDRSW=1 %s -o %t.o
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# RUN: %clang %cflags %t.o -o %t.so -Wl,-q
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# RUN: llvm-bolt %t.so -o %t.bolt
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# RUN: llvm-objdump -d %t.bolt | FileCheck %s --check-prefix=RELAX_LDRSW
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# RELAX_LDRSW: adrp
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# RELAX_LDRSW-NEXT: ldrsw
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.ifdef RELAX_SIMPLE_LDRSW
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.text
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.global _start
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.type _start, %function
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_start:
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.cfi_startproc
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ldrsw x0, _foo
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ret
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.cfi_endproc
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.size _start, .-_start
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.endif
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.section .text_cold
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.global _foo
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.align 3
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_foo:
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.long 0x12345678
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.size _foo, .-_foo
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