1 ; RUN: llc < %s -mtriple=x86_64-linux > %t 2 ; RUN: grep "movzbl %[abcd]h," %t | count 8 3 ; RUN: grep "%[abcd]h" %t | not grep "%r[[:digit:]]*d" 4 5 ; LLVM creates virtual registers for values live across blocks 6 ; based on the type of the value. Make sure that the extracts 7 ; here use the GR64_NOREX register class for their result, 8 ; instead of plain GR64. 9 10 define i64 @foo(i64 %a, i64 %b, i64 %c, i64 %d, 11 i64 %e, i64 %f, i64 %g, i64 %h) { 12 %sa = lshr i64 %a, 8 13 %A = and i64 %sa, 255 14 %sb = lshr i64 %b, 8 15 %B = and i64 %sb, 255 16 %sc = lshr i64 %c, 8 17 %C = and i64 %sc, 255 18 %sd = lshr i64 %d, 8 19 %D = and i64 %sd, 255 20 %se = lshr i64 %e, 8 21 %E = and i64 %se, 255 22 %sf = lshr i64 %f, 8 23 %F = and i64 %sf, 255 24 %sg = lshr i64 %g, 8 25 %G = and i64 %sg, 255 26 %sh = lshr i64 %h, 8 27 %H = and i64 %sh, 255 28 br label %next 29 30 next: 31 %u = add i64 %A, %B 32 %v = add i64 %C, %D 33 %w = add i64 %E, %F 34 %x = add i64 %G, %H 35 %y = add i64 %u, %v 36 %z = add i64 %w, %x 37 %t = add i64 %y, %z 38 ret i64 %t 39 } 40
