26 lines
657 B
LLVM
26 lines
657 B
LLVM
; RUN: llc < %s -O3 -mtriple=x86_64-- |FileCheck %s
|
|
define i64 @foo(i64 %data1, i64 %data2, i64 %data3)
|
|
{
|
|
; If constant 4294967295 is hoisted to a variable, then we won't be able to
|
|
; use a shift right by 32 to optimize the compare.
|
|
entry:
|
|
%val1 = add i64 %data3, 1
|
|
%x = icmp ugt i64 %data1, 4294967295
|
|
br i1 %x, label %End, label %L_val2
|
|
|
|
; CHECK: shrq $32, {{.*}}
|
|
; CHECK: shrq $32, {{.*}}
|
|
L_val2:
|
|
%val2 = add i64 %data3, 2
|
|
%y = icmp ugt i64 %data2, 4294967295
|
|
br i1 %y, label %End, label %L_val3
|
|
|
|
L_val3:
|
|
%val3 = add i64 %data3, 3
|
|
br label %End
|
|
|
|
End:
|
|
%p1 = phi i64 [%val1,%entry], [%val2,%L_val2], [%val3,%L_val3]
|
|
ret i64 %p1
|
|
}
|