1 ; RUN: llc < %s -O3 -march=x86-64 |FileCheck %s 2 define i64 @foo(i64 %data1, i64 %data2, i64 %data3) 3 { 4 ; If constant 4294967295 is hoisted to a variable, then we won't be able to 5 ; use a shift right by 32 to optimize the compare. 6 entry: 7 %val1 = add i64 %data3, 1 8 %x = icmp ugt i64 %data1, 4294967295 9 br i1 %x, label %End, label %L_val2 10 11 ; CHECK: shrq $32, {{.*}} 12 ; CHECK: shrq $32, {{.*}} 13 L_val2: 14 %val2 = add i64 %data3, 2 15 %y = icmp ugt i64 %data2, 4294967295 16 br i1 %y, label %End, label %L_val3 17 18 L_val3: 19 %val3 = add i64 %data3, 3 20 br label %End 21 22 End: 23 %p1 = phi i64 [%val1,%entry], [%val2,%L_val2], [%val3,%L_val3] 24 ret i64 %p1 25 } 26
