401d123a1f
Before this patch, redundant COPY couldn't be removed for the following case: ``` $R0 = OP ... ... // Read of %R0 $R1 = COPY killed $R0 ``` This patch adds support for tracking the users of the source register during backward propagation, so that we can remove the redundant COPY in the above case and optimize it to: ``` $R1 = OP ... ... // Replace all uses of %R0 with $R1 ```
123 lines
4.7 KiB
LLVM
123 lines
4.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -march=mips -verify-machineinstrs \
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; RUN: < %s | FileCheck %s -check-prefix=MIPS32
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; RUN: llc -march=mips -verify-machineinstrs -relocation-model=pic \
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; RUN: < %s | FileCheck %s -check-prefix=MIPS32-PIC
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; RUN: llc -march=mips64 -verify-machineinstrs \
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; RUN: < %s | FileCheck %s -check-prefix=MIPS64
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; RUN: llc -march=mips64 -verify-machineinstrs -relocation-model=pic \
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; RUN: < %s | FileCheck %s -check-prefix=MIPS64-PIC
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; RUN: llc -march=mips -verify-machineinstrs -mattr=+micromips \
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; RUN: < %s | FileCheck %s -check-prefix=MIPS32-MM
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; RUN: llc -march=mips -verify-machineinstrs -relocation-model=pic -mattr=+micromips \
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; RUN: < %s | FileCheck %s -check-prefix=MIPS32-MM-PIC
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; Test that checks ABI for _mcount calls.
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define void @foo() {
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; MIPS32-LABEL: foo:
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; MIPS32: # %bb.0: # %entry
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; MIPS32-NEXT: addiu $sp, $sp, -24
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; MIPS32-NEXT: .cfi_def_cfa_offset 24
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; MIPS32-NEXT: sw $ra, 20($sp) # 4-byte Folded Spill
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; MIPS32-NEXT: .cfi_offset 31, -4
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; MIPS32-NEXT: move $1, $ra
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; MIPS32-NEXT: jal _mcount
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; MIPS32-NEXT: addiu $sp, $sp, -8
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; MIPS32-NEXT: lw $ra, 20($sp) # 4-byte Folded Reload
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; MIPS32-NEXT: jr $ra
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; MIPS32-NEXT: addiu $sp, $sp, 24
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;
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; MIPS32-PIC-LABEL: foo:
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; MIPS32-PIC: # %bb.0: # %entry
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; MIPS32-PIC-NEXT: lui $2, %hi(_gp_disp)
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; MIPS32-PIC-NEXT: addiu $2, $2, %lo(_gp_disp)
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; MIPS32-PIC-NEXT: addiu $sp, $sp, -24
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; MIPS32-PIC-NEXT: .cfi_def_cfa_offset 24
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; MIPS32-PIC-NEXT: sw $ra, 20($sp) # 4-byte Folded Spill
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; MIPS32-PIC-NEXT: .cfi_offset 31, -4
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; MIPS32-PIC-NEXT: addu $gp, $2, $25
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; MIPS32-PIC-NEXT: lw $25, %call16(_mcount)($gp)
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; MIPS32-PIC-NEXT: move $1, $ra
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; MIPS32-PIC-NEXT: .reloc ($tmp0), R_MIPS_JALR, _mcount
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; MIPS32-PIC-NEXT: $tmp0:
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; MIPS32-PIC-NEXT: jalr $25
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; MIPS32-PIC-NEXT: addiu $sp, $sp, -8
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; MIPS32-PIC-NEXT: lw $ra, 20($sp) # 4-byte Folded Reload
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; MIPS32-PIC-NEXT: jr $ra
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; MIPS32-PIC-NEXT: addiu $sp, $sp, 24
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;
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; MIPS64-LABEL: foo:
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; MIPS64: # %bb.0: # %entry
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; MIPS64-NEXT: daddiu $sp, $sp, -16
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; MIPS64-NEXT: .cfi_def_cfa_offset 16
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; MIPS64-NEXT: sd $ra, 8($sp) # 8-byte Folded Spill
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; MIPS64-NEXT: .cfi_offset 31, -8
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; MIPS64-NEXT: move $1, $ra
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; MIPS64-NEXT: jal _mcount
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; MIPS64-NEXT: nop
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; MIPS64-NEXT: ld $ra, 8($sp) # 8-byte Folded Reload
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; MIPS64-NEXT: jr $ra
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; MIPS64-NEXT: daddiu $sp, $sp, 16
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;
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; MIPS64-PIC-LABEL: foo:
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; MIPS64-PIC: # %bb.0: # %entry
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; MIPS64-PIC-NEXT: daddiu $sp, $sp, -16
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; MIPS64-PIC-NEXT: .cfi_def_cfa_offset 16
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; MIPS64-PIC-NEXT: sd $ra, 8($sp) # 8-byte Folded Spill
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; MIPS64-PIC-NEXT: sd $gp, 0($sp) # 8-byte Folded Spill
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; MIPS64-PIC-NEXT: .cfi_offset 31, -8
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; MIPS64-PIC-NEXT: .cfi_offset 28, -16
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; MIPS64-PIC-NEXT: lui $1, %hi(%neg(%gp_rel(foo)))
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; MIPS64-PIC-NEXT: daddu $1, $1, $25
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; MIPS64-PIC-NEXT: daddiu $gp, $1, %lo(%neg(%gp_rel(foo)))
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; MIPS64-PIC-NEXT: ld $25, %call16(_mcount)($gp)
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; MIPS64-PIC-NEXT: move $1, $ra
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; MIPS64-PIC-NEXT: .reloc .Ltmp0, R_MIPS_JALR, _mcount
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; MIPS64-PIC-NEXT: .Ltmp0:
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; MIPS64-PIC-NEXT: jalr $25
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; MIPS64-PIC-NEXT: nop
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; MIPS64-PIC-NEXT: ld $gp, 0($sp) # 8-byte Folded Reload
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; MIPS64-PIC-NEXT: ld $ra, 8($sp) # 8-byte Folded Reload
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; MIPS64-PIC-NEXT: jr $ra
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; MIPS64-PIC-NEXT: daddiu $sp, $sp, 16
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;
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; MIPS32-MM-LABEL: foo:
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; MIPS32-MM: # %bb.0: # %entry
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; MIPS32-MM-NEXT: addiu $sp, $sp, -24
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; MIPS32-MM-NEXT: .cfi_def_cfa_offset 24
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; MIPS32-MM-NEXT: sw $ra, 20($sp) # 4-byte Folded Spill
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; MIPS32-MM-NEXT: .cfi_offset 31, -4
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; MIPS32-MM-NEXT: move $1, $ra
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; MIPS32-MM-NEXT: jal _mcount
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; MIPS32-MM-NEXT: addiu $sp, $sp, -8
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; MIPS32-MM-NEXT: lw $ra, 20($sp) # 4-byte Folded Reload
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; MIPS32-MM-NEXT: jr $ra
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; MIPS32-MM-NEXT: addiu $sp, $sp, 24
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;
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; MIPS32-MM-PIC-LABEL: foo:
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; MIPS32-MM-PIC: # %bb.0: # %entry
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; MIPS32-MM-PIC-NEXT: lui $2, %hi(_gp_disp)
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; MIPS32-MM-PIC-NEXT: addiu $2, $2, %lo(_gp_disp)
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; MIPS32-MM-PIC-NEXT: addiu $sp, $sp, -24
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; MIPS32-MM-PIC-NEXT: .cfi_def_cfa_offset 24
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; MIPS32-MM-PIC-NEXT: sw $ra, 20($sp) # 4-byte Folded Spill
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; MIPS32-MM-PIC-NEXT: .cfi_offset 31, -4
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; MIPS32-MM-PIC-NEXT: addu $gp, $2, $25
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; MIPS32-MM-PIC-NEXT: lw $25, %call16(_mcount)($gp)
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; MIPS32-MM-PIC-NEXT: move $1, $ra
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; MIPS32-MM-PIC-NEXT: .reloc ($tmp0), R_MICROMIPS_JALR, _mcount
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; MIPS32-MM-PIC-NEXT: $tmp0:
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; MIPS32-MM-PIC-NEXT: jalr $25
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; MIPS32-MM-PIC-NEXT: addiu $sp, $sp, -8
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; MIPS32-MM-PIC-NEXT: lw $ra, 20($sp) # 4-byte Folded Reload
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; MIPS32-MM-PIC-NEXT: jr $ra
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; MIPS32-MM-PIC-NEXT: addiu $sp, $sp, 24
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entry:
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call void @_mcount()
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ret void
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}
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declare void @_mcount()
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