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105 lines
3.0 KiB
LLVM
105 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -O0 -mtriple=mipsel-linux-gnu -global-isel -verify-machineinstrs %s -o -| FileCheck %s -check-prefixes=MIPS32
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define i32 @cttz_i32(i32 %a) {
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; MIPS32-LABEL: cttz_i32:
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; MIPS32: # %bb.0: # %entry
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; MIPS32-NEXT: not $1, $4
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; MIPS32-NEXT: addiu $2, $4, -1
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; MIPS32-NEXT: and $2, $1, $2
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; MIPS32-NEXT: ori $1, $zero, 32
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; MIPS32-NEXT: clz $2, $2
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; MIPS32-NEXT: subu $2, $1, $2
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; MIPS32-NEXT: jr $ra
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; MIPS32-NEXT: nop
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entry:
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%0 = call i32 @llvm.cttz.i32(i32 %a, i1 false)
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ret i32 %0
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}
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declare i32 @llvm.cttz.i32(i32, i1 immarg)
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define i64 @cttz_i64(i64 %a) {
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; MIPS32-LABEL: cttz_i64:
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; MIPS32: # %bb.0: # %entry
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; MIPS32-NEXT: ori $3, $zero, 0
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; MIPS32-NEXT: not $1, $5
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; MIPS32-NEXT: addiu $2, $5, -1
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; MIPS32-NEXT: and $1, $1, $2
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; MIPS32-NEXT: ori $2, $zero, 32
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; MIPS32-NEXT: clz $1, $1
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; MIPS32-NEXT: subu $1, $2, $1
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; MIPS32-NEXT: addiu $1, $1, 32
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; MIPS32-NEXT: not $5, $4
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; MIPS32-NEXT: addiu $6, $4, -1
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; MIPS32-NEXT: and $5, $5, $6
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; MIPS32-NEXT: clz $5, $5
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; MIPS32-NEXT: subu $2, $2, $5
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; MIPS32-NEXT: movz $2, $1, $4
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; MIPS32-NEXT: jr $ra
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; MIPS32-NEXT: nop
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entry:
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%0 = call i64 @llvm.cttz.i64(i64 %a, i1 false)
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ret i64 %0
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}
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declare i64 @llvm.cttz.i64(i64, i1 immarg)
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define i32 @ffs_i32_expansion(i32 %a) {
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; MIPS32-LABEL: ffs_i32_expansion:
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; MIPS32: # %bb.0: # %entry
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; MIPS32-NEXT: ori $1, $zero, 0
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; MIPS32-NEXT: not $2, $4
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; MIPS32-NEXT: addiu $3, $4, -1
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; MIPS32-NEXT: and $3, $2, $3
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; MIPS32-NEXT: ori $2, $zero, 32
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; MIPS32-NEXT: clz $3, $3
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; MIPS32-NEXT: subu $2, $2, $3
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; MIPS32-NEXT: addiu $2, $2, 1
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; MIPS32-NEXT: movz $2, $1, $4
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; MIPS32-NEXT: jr $ra
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; MIPS32-NEXT: nop
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entry:
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%0 = call i32 @llvm.cttz.i32(i32 %a, i1 true)
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%1 = add nuw nsw i32 %0, 1
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%iszero = icmp eq i32 %a, 0
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%ffs = select i1 %iszero, i32 0, i32 %1
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ret i32 %ffs
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}
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define i64 @ffs_i64_expansion(i64 %a) {
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; MIPS32-LABEL: ffs_i64_expansion:
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; MIPS32: # %bb.0: # %entry
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; MIPS32-NEXT: ori $3, $zero, 1
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; MIPS32-NEXT: ori $1, $zero, 0
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; MIPS32-NEXT: not $2, $5
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; MIPS32-NEXT: addiu $6, $5, -1
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; MIPS32-NEXT: and $6, $2, $6
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; MIPS32-NEXT: ori $2, $zero, 32
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; MIPS32-NEXT: clz $6, $6
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; MIPS32-NEXT: subu $6, $2, $6
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; MIPS32-NEXT: addiu $6, $6, 32
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; MIPS32-NEXT: not $7, $4
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; MIPS32-NEXT: addiu $8, $4, -1
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; MIPS32-NEXT: and $7, $7, $8
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; MIPS32-NEXT: clz $7, $7
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; MIPS32-NEXT: subu $2, $2, $7
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; MIPS32-NEXT: movz $2, $6, $4
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; MIPS32-NEXT: addiu $2, $2, 1
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; MIPS32-NEXT: sltu $6, $2, $3
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; MIPS32-NEXT: addiu $3, $1, 0
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; MIPS32-NEXT: addu $3, $3, $6
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; MIPS32-NEXT: xori $4, $4, 0
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; MIPS32-NEXT: xori $5, $5, 0
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; MIPS32-NEXT: or $4, $4, $5
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; MIPS32-NEXT: movz $2, $1, $4
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; MIPS32-NEXT: movz $3, $1, $4
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; MIPS32-NEXT: jr $ra
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; MIPS32-NEXT: nop
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entry:
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%0 = call i64 @llvm.cttz.i64(i64 %a, i1 true)
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%1 = add nuw nsw i64 %0, 1
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%iszero = icmp eq i64 %a, 0
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%ffs = select i1 %iszero, i64 0, i64 %1
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ret i64 %ffs
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}
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