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068d715728
And instead just generate a libcall. My motivating example on ARM was a simple: shl i64 %A, %B for which the code bloat is quite significant. For other targets that also accept __int128/i128 such as AArch64 and X86, it is also beneficial for these cases to generate a libcall when optimising for minsize. On these 64-bit targets, the 64-bits shifts are of course unaffected because the SHIFT/SHIFT_PARTS lowering operation action is not set to custom/expand. Differential Revision: https://reviews.llvm.org/D57386 llvm-svn: 352736
123 lines
4.8 KiB
LLVM
123 lines
4.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s
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define i64 @f0(i64 %val, i64 %amt) minsize optsize {
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; CHECK-LABEL: f0:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsl x0, x0, x1
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; CHECK-NEXT: ret
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%res = shl i64 %val, %amt
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ret i64 %res
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}
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define i32 @f1(i64 %x, i64 %y) minsize optsize {
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; CHECK-LABEL: f1:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsl x0, x0, x1
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; CHECK-NEXT: // kill: def $w0 killed $w0 killed $x0
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; CHECK-NEXT: ret
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%a = shl i64 %x, %y
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%b = trunc i64 %a to i32
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ret i32 %b
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}
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define i32 @f2(i64 %x, i64 %y) minsize optsize {
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; CHECK-LABEL: f2:
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; CHECK: // %bb.0:
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; CHECK-NEXT: asr x0, x0, x1
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; CHECK-NEXT: // kill: def $w0 killed $w0 killed $x0
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; CHECK-NEXT: ret
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%a = ashr i64 %x, %y
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%b = trunc i64 %a to i32
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ret i32 %b
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}
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define i32 @f3(i64 %x, i64 %y) minsize optsize {
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; CHECK-LABEL: f3:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsr x0, x0, x1
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; CHECK-NEXT: // kill: def $w0 killed $w0 killed $x0
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; CHECK-NEXT: ret
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%a = lshr i64 %x, %y
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%b = trunc i64 %a to i32
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ret i32 %b
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}
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define dso_local { i64, i64 } @shl128(i64 %x.coerce0, i64 %x.coerce1, i8 signext %y) minsize optsize {
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; CHECK-LABEL: shl128:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset w30, -16
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; CHECK-NEXT: // kill: def $w2 killed $w2 def $x2
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; CHECK-NEXT: bl __ashlti3
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; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
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; CHECK-NEXT: ret
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entry:
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%x.sroa.2.0.insert.ext = zext i64 %x.coerce1 to i128
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%x.sroa.2.0.insert.shift = shl nuw i128 %x.sroa.2.0.insert.ext, 64
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%x.sroa.0.0.insert.ext = zext i64 %x.coerce0 to i128
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%x.sroa.0.0.insert.insert = or i128 %x.sroa.2.0.insert.shift, %x.sroa.0.0.insert.ext
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%conv = sext i8 %y to i32
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%sh_prom = zext i32 %conv to i128
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%shl = shl i128 %x.sroa.0.0.insert.insert, %sh_prom
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%retval.sroa.0.0.extract.trunc = trunc i128 %shl to i64
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%retval.sroa.2.0.extract.shift = lshr i128 %shl, 64
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%retval.sroa.2.0.extract.trunc = trunc i128 %retval.sroa.2.0.extract.shift to i64
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%.fca.0.insert = insertvalue { i64, i64 } undef, i64 %retval.sroa.0.0.extract.trunc, 0
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%.fca.1.insert = insertvalue { i64, i64 } %.fca.0.insert, i64 %retval.sroa.2.0.extract.trunc, 1
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ret { i64, i64 } %.fca.1.insert
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}
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define dso_local { i64, i64 } @ashr128(i64 %x.coerce0, i64 %x.coerce1, i8 signext %y) minsize optsize {
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; CHECK-LABEL: ashr128:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset w30, -16
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; CHECK-NEXT: // kill: def $w2 killed $w2 def $x2
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; CHECK-NEXT: bl __ashrti3
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; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
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; CHECK-NEXT: ret
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entry:
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%x.sroa.2.0.insert.ext = zext i64 %x.coerce1 to i128
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%x.sroa.2.0.insert.shift = shl nuw i128 %x.sroa.2.0.insert.ext, 64
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%x.sroa.0.0.insert.ext = zext i64 %x.coerce0 to i128
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%x.sroa.0.0.insert.insert = or i128 %x.sroa.2.0.insert.shift, %x.sroa.0.0.insert.ext
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%conv = sext i8 %y to i32
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%sh_prom = zext i32 %conv to i128
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%shr = ashr i128 %x.sroa.0.0.insert.insert, %sh_prom
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%retval.sroa.0.0.extract.trunc = trunc i128 %shr to i64
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%retval.sroa.2.0.extract.shift = lshr i128 %shr, 64
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%retval.sroa.2.0.extract.trunc = trunc i128 %retval.sroa.2.0.extract.shift to i64
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%.fca.0.insert = insertvalue { i64, i64 } undef, i64 %retval.sroa.0.0.extract.trunc, 0
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%.fca.1.insert = insertvalue { i64, i64 } %.fca.0.insert, i64 %retval.sroa.2.0.extract.trunc, 1
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ret { i64, i64 } %.fca.1.insert
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}
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define dso_local { i64, i64 } @lshr128(i64 %x.coerce0, i64 %x.coerce1, i8 signext %y) minsize optsize {
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; CHECK-LABEL: lshr128:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset w30, -16
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; CHECK-NEXT: // kill: def $w2 killed $w2 def $x2
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; CHECK-NEXT: bl __lshrti3
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; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
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; CHECK-NEXT: ret
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entry:
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%x.sroa.2.0.insert.ext = zext i64 %x.coerce1 to i128
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%x.sroa.2.0.insert.shift = shl nuw i128 %x.sroa.2.0.insert.ext, 64
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%x.sroa.0.0.insert.ext = zext i64 %x.coerce0 to i128
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%x.sroa.0.0.insert.insert = or i128 %x.sroa.2.0.insert.shift, %x.sroa.0.0.insert.ext
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%conv = sext i8 %y to i32
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%sh_prom = zext i32 %conv to i128
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%shr = lshr i128 %x.sroa.0.0.insert.insert, %sh_prom
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%retval.sroa.0.0.extract.trunc = trunc i128 %shr to i64
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%retval.sroa.2.0.extract.shift = lshr i128 %shr, 64
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%retval.sroa.2.0.extract.trunc = trunc i128 %retval.sroa.2.0.extract.shift to i64
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%.fca.0.insert = insertvalue { i64, i64 } undef, i64 %retval.sroa.0.0.extract.trunc, 0
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%.fca.1.insert = insertvalue { i64, i64 } %.fca.0.insert, i64 %retval.sroa.2.0.extract.trunc, 1
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ret { i64, i64 } %.fca.1.insert
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}
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