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76a0f98726
Summary: This assembler directive is used in O32 PIC to restore the current function's $gp after executing JAL's. The $gp is first stored on the stack at a user-specified offset. It has the following format: ".cprestore 8" (where 8 is the offset). This fixes llvm.org/PR20967. Patch by Toma Tabacu. Reviewers: seanbruno, tomatabacu Subscribers: brooks, seanbruno, emaste, llvm-commits Differential Revision: http://reviews.llvm.org/D6267 llvm-svn: 247897
98 lines
4.4 KiB
ArmAsm
98 lines
4.4 KiB
ArmAsm
# RUN: llvm-mc %s -arch=mips -mcpu=mips32 -relocation-model=pic -show-encoding | \
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# RUN: FileCheck %s
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# RUN: llvm-mc %s -arch=mips -mcpu=mips32 -relocation-model=pic -filetype=obj -o -| \
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# RUN: llvm-objdump -d -r -arch=mips - | \
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# RUN: FileCheck %s -check-prefix=CHECK-FOR-STORE
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# RUN: llvm-mc %s -arch=mips -mcpu=mips32 -mattr=+micromips -relocation-model=pic -show-encoding | \
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# RUN: FileCheck %s -check-prefix=MICROMIPS
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# RUN: llvm-mc %s -arch=mips -mcpu=mips32 -relocation-model=static -show-encoding | \
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# RUN: FileCheck %s -check-prefix=NO-PIC
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# RUN: llvm-mc %s -arch=mips -mcpu=mips64 -target-abi n32 -relocation-model=pic -show-encoding | \
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# RUN: FileCheck %s -check-prefix=BAD-ABI -check-prefix=BAD-ABI-N32
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# RUN: llvm-mc %s -arch=mips64 -mcpu=mips64 -target-abi n64 -relocation-model=pic -show-encoding | \
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# RUN: FileCheck %s -check-prefix=BAD-ABI -check-prefix=BAD-ABI-N64
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.text
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.ent foo
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foo:
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.frame $sp, 0, $ra
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.set noreorder
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.cpload $25
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.cprestore 8
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jal $25
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jal $4, $25
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jal foo
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.end foo
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# CHECK-FOR-STORE: sw $gp, 8($sp)
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# CHECK: .cprestore 8
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# CHECK: jalr $25 # encoding: [0x03,0x20,0xf8,0x09]
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# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
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# CHECK: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# CHECK: jalr $4, $25 # encoding: [0x03,0x20,0x20,0x09]
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# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
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# CHECK: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# CHECK: lw $25, %got(foo)($gp) # encoding: [0x8f,0x99,A,A]
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# CHECK: # fixup A - offset: 0, value: foo@GOT, kind: fixup_Mips_GOT_Local
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# CHECK: addiu $25, $25, %lo(foo) # encoding: [0x27,0x39,A,A]
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# CHECK: # fixup A - offset: 0, value: foo@ABS_LO, kind: fixup_Mips_LO16
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# CHECK: jalr $25 # encoding: [0x03,0x20,0xf8,0x09]
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# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
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# CHECK: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# CHECK: .end foo
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# MICROMIPS: .cprestore 8
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# MICROMIPS: jalrs16 $25 # encoding: [0x45,0xf9]
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# MICROMIPS: nop # encoding: [0x00,0x00,0x00,0x00]
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# MICROMIPS: lw $gp, 8($sp) # encoding: [0xff,0x9d,0x00,0x08]
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# MICROMIPS: jalrs $4, $25 # encoding: [0x00,0x99,0x4f,0x3c]
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# MICROMIPS: nop # encoding: [0x00,0x00,0x00,0x00]
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# MICROMIPS: lw $gp, 8($sp) # encoding: [0xff,0x9d,0x00,0x08]
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# MICROMIPS: lw $25, %got(foo)($gp) # encoding: [0xff,0x3c,A,A]
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# MICROMIPS: # fixup A - offset: 0, value: foo@GOT, kind: fixup_MICROMIPS_GOT16
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# MICROMIPS: addiu $25, $25, %lo(foo) # encoding: [0x33,0x39,A,A]
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# MICROMIPS: # fixup A - offset: 0, value: foo@ABS_LO, kind: fixup_MICROMIPS_LO16
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# MICROMIPS: jalrs $ra, $25 # encoding: [0x03,0xf9,0x4f,0x3c]
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# MICROMIPS: nop # encoding: [0x0c,0x00]
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# MICROMIPS: lw $gp, 8($sp) # encoding: [0xff,0x9d,0x00,0x08]
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# MICROMIPS: .end foo
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# NO-PIC: .cprestore 8
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# NO-PIC: jalr $25 # encoding: [0x03,0x20,0xf8,0x09]
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# NO-PIC-NOT: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# NO-PIC: jalr $4, $25 # encoding: [0x03,0x20,0x20,0x09]
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# NO-PIC-NOT: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# NO-PIC: jal foo # encoding: [0b000011AA,A,A,A]
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# NO-PIC: # fixup A - offset: 0, value: foo, kind: fixup_Mips_26
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# NO-PIC-NOT: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# NO-PIC: .end foo
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# BAD-ABI: .cprestore 8
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# BAD-ABI: jalr $25 # encoding: [0x03,0x20,0xf8,0x09]
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# BAD-ABI-NOT: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# BAD-ABI: jalr $4, $25 # encoding: [0x03,0x20,0x20,0x09]
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# BAD-ABI-NOT: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# BAD-ABI-N32: lw $25, %got_disp(foo)($gp) # encoding: [0x8f,0x99,A,A]
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# BAD-ABI-N64: ld $25, %got_disp(foo)($gp) # encoding: [0xdf,0x99,A,A]
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# BAD-ABI: # fixup A - offset: 0, value: foo@GOT_DISP, kind: fixup_Mips_GOT_DISP
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# BAD-ABI: jalr $25 # encoding: [0x03,0x20,0xf8,0x09]
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# BAD-ABI-NOT: lw $gp, 8($sp) # encoding: [0x8f,0xbc,0x00,0x08]
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# BAD-ABI: .end foo
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