1 ; RUN: opt < %s -instcombine -S | FileCheck %s 2 3 ; Instcombine normally would fold the sdiv into the comparison, 4 ; making "icmp slt i32 %h, 2", but in this case the sdiv has 5 ; another use, so it wouldn't a big win, and it would also 6 ; obfuscate an otherise obvious smax pattern to the point where 7 ; other analyses wouldn't recognize it. 8 9 define i32 @foo(i32 %h) { 10 %sd = sdiv i32 %h, 2 11 %t = icmp slt i32 %sd, 1 12 %r = select i1 %t, i32 %sd, i32 1 13 ret i32 %r 14 } 15 16 ; CHECK: %sd = sdiv i32 %h, 2 17 ; CHECK: %t = icmp slt i32 %sd, 1 18 ; CHECK: %r = select i1 %t, i32 %sd, i32 1 19 ; CHECK: ret i32 %r 20 21 define i32 @bar(i32 %h) { 22 %sd = sdiv i32 %h, 2 23 %t = icmp sgt i32 %sd, 1 24 %r = select i1 %t, i32 %sd, i32 1 25 ret i32 %r 26 } 27 28 ; CHECK: %sd = sdiv i32 %h, 2 29 ; CHECK: %t = icmp sgt i32 %sd, 1 30 ; CHECK: %r = select i1 %t, i32 %sd, i32 1 31 ; CHECK: ret i32 %r 32 33
