1 ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s 2 3 define zeroext i1 @f1(i8* %x) { 4 ; CHECK-LABEL: f1: 5 ; CHECK: movb (%rdi), %al 6 ; CHECK-NEXT: ret 7 8 entry: 9 %0 = load i8, i8* %x, align 1, !range !0 10 %tobool = trunc i8 %0 to i1 11 ret i1 %tobool 12 } 13 14 define zeroext i1 @f2(i8* %x) { 15 ; CHECK-LABEL: f2: 16 ; CHECK: movb (%rdi), %al 17 ; CHECK-NEXT: ret 18 19 entry: 20 %0 = load i8, i8* %x, align 1, !range !0 21 %tobool = icmp ne i8 %0, 0 22 ret i1 %tobool 23 } 24 25 !0 = !{i8 0, i8 2} 26 27 28 ; check that we don't build a "trunc" from i1 to i1, which would assert. 29 define zeroext i1 @f3(i1 %x) { 30 ; CHECK-LABEL: f3: 31 32 entry: 33 %tobool = icmp ne i1 %x, 0 34 ret i1 %tobool 35 } 36 37 ; check that we don't build a trunc when other bits are needed 38 define zeroext i1 @f4(i32 %x) { 39 ; CHECK-LABEL: f4: 40 ; CHECK: and 41 42 entry: 43 %y = and i32 %x, 32768 44 %z = icmp ne i32 %y, 0 45 ret i1 %z 46 } 47
