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[AArch64][x86] adjust tests with shift-add-shift; NFC 

Prevent folding away the math completely.

llvm-svn: 367612
This commit is contained in:
Sanjay Patel 2019-08-01 21:08:08 +00:00
parent 7740c6d643
commit 8560ea5534
2 changed files with 14 additions and 6 deletions
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6
llvm/test/CodeGen/AArch64/shift-mod.ll
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@ -91,10 +91,12 @@ define i64 @ashr_add_shl_i32(i64 %r) {
define i64 @ashr_add_shl_i8(i64 %r) {
; CHECK-LABEL: ashr_add_shl_i8:
; CHECK: // %bb.0:
; CHECK-NEXT: sxtb x0, w0
; CHECK-NEXT: mov x8, #72057594037927936
; CHECK-NEXT: add x8, x8, x0, lsl #56
; CHECK-NEXT: asr x0, x8, #56
; CHECK-NEXT: ret
%conv = shl i64 %r, 56
%sext = add i64 %conv, 4294967296
%sext = add i64 %conv, 72057594037927936
%conv1 = ashr i64 %sext, 56
ret i64 %conv1
}

14
llvm/test/CodeGen/X86/shift-combine.ll
View File

@ -182,17 +182,23 @@ define i64 @ashr_add_shl_i32(i64 %r) nounwind {
define i64 @ashr_add_shl_i8(i64 %r) nounwind {
; X32-LABEL: ashr_add_shl_i8:
; X32: # %bb.0:
; X32-NEXT: movsbl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl %eax, %edx
; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
; X32-NEXT: shll $24, %edx
; X32-NEXT: addl $16777216, %edx # imm = 0x1000000
; X32-NEXT: movl %edx, %eax
; X32-NEXT: sarl $24, %eax
; X32-NEXT: sarl $31, %edx
; X32-NEXT: retl
;
; X64-LABEL: ashr_add_shl_i8:
; X64: # %bb.0:
; X64-NEXT: movsbq %dil, %rax
; X64-NEXT: shlq $56, %rdi
; X64-NEXT: movabsq $72057594037927936, %rax # imm = 0x100000000000000
; X64-NEXT: addq %rdi, %rax
; X64-NEXT: sarq $56, %rax
; X64-NEXT: retq
%conv = shl i64 %r, 56
%sext = add i64 %conv, 4294967296
%sext = add i64 %conv, 72057594037927936
%conv1 = ashr i64 %sext, 56
ret i64 %conv1
}