1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; An integer truncation to i1 should be done with an and instruction to make 3 ; sure only the LSBit survives. Test that this is the case both for a returned 4 ; value and as the operand of a branch. 5 ; RUN: llc < %s -mtriple=i686-unknown-linux-gnu | FileCheck %s 6 7 define zeroext i1 @test1(i32 %X) nounwind { 8 ; CHECK-LABEL: test1: 9 ; CHECK: # %bb.0: 10 ; CHECK-NEXT: movb {{[0-9]+}}(%esp), %al 11 ; CHECK-NEXT: andb $1, %al 12 ; CHECK-NEXT: retl 13 %Y = trunc i32 %X to i1 14 ret i1 %Y 15 } 16 17 define i1 @test2(i32 %val, i32 %mask) nounwind { 18 ; CHECK-LABEL: test2: 19 ; CHECK: # %bb.0: # %entry 20 ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax 21 ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx 22 ; CHECK-NEXT: btl %ecx, %eax 23 ; CHECK-NEXT: jae .LBB1_2 24 ; CHECK-NEXT: # %bb.1: # %ret_true 25 ; CHECK-NEXT: movb $1, %al 26 ; CHECK-NEXT: retl 27 ; CHECK-NEXT: .LBB1_2: # %ret_false 28 ; CHECK-NEXT: xorl %eax, %eax 29 ; CHECK-NEXT: retl 30 entry: 31 %shifted = ashr i32 %val, %mask 32 %anded = and i32 %shifted, 1 33 %trunced = trunc i32 %anded to i1 34 br i1 %trunced, label %ret_true, label %ret_false 35 ret_true: 36 ret i1 true 37 ret_false: 38 ret i1 false 39 } 40 41 define i32 @test3(i8* %ptr) nounwind { 42 ; CHECK-LABEL: test3: 43 ; CHECK: # %bb.0: 44 ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax 45 ; CHECK-NEXT: testb $1, (%eax) 46 ; CHECK-NEXT: je .LBB2_2 47 ; CHECK-NEXT: # %bb.1: # %cond_true 48 ; CHECK-NEXT: movl $21, %eax 49 ; CHECK-NEXT: retl 50 ; CHECK-NEXT: .LBB2_2: # %cond_false 51 ; CHECK-NEXT: movl $42, %eax 52 ; CHECK-NEXT: retl 53 %val = load i8, i8* %ptr 54 %tmp = trunc i8 %val to i1 55 br i1 %tmp, label %cond_true, label %cond_false 56 cond_true: 57 ret i32 21 58 cond_false: 59 ret i32 42 60 } 61 62 define i32 @test4(i8* %ptr) nounwind { 63 ; CHECK-LABEL: test4: 64 ; CHECK: # %bb.0: 65 ; CHECK-NEXT: testb $1, {{[0-9]+}}(%esp) 66 ; CHECK-NEXT: je .LBB3_2 67 ; CHECK-NEXT: # %bb.1: # %cond_true 68 ; CHECK-NEXT: movl $21, %eax 69 ; CHECK-NEXT: retl 70 ; CHECK-NEXT: .LBB3_2: # %cond_false 71 ; CHECK-NEXT: movl $42, %eax 72 ; CHECK-NEXT: retl 73 %tmp = ptrtoint i8* %ptr to i1 74 br i1 %tmp, label %cond_true, label %cond_false 75 cond_true: 76 ret i32 21 77 cond_false: 78 ret i32 42 79 } 80 81 define i32 @test5(double %d) nounwind { 82 ; CHECK-LABEL: test5: 83 ; CHECK: # %bb.0: 84 ; CHECK-NEXT: pushl %eax 85 ; CHECK-NEXT: fldl {{[0-9]+}}(%esp) 86 ; CHECK-NEXT: fnstcw (%esp) 87 ; CHECK-NEXT: movzwl (%esp), %eax 88 ; CHECK-NEXT: movw $3199, (%esp) # imm = 0xC7F 89 ; CHECK-NEXT: fldcw (%esp) 90 ; CHECK-NEXT: movw %ax, (%esp) 91 ; CHECK-NEXT: fistps {{[0-9]+}}(%esp) 92 ; CHECK-NEXT: fldcw (%esp) 93 ; CHECK-NEXT: testb $1, {{[0-9]+}}(%esp) 94 ; CHECK-NEXT: je .LBB4_2 95 ; CHECK-NEXT: # %bb.1: # %cond_true 96 ; CHECK-NEXT: movl $21, %eax 97 ; CHECK-NEXT: popl %ecx 98 ; CHECK-NEXT: retl 99 ; CHECK-NEXT: .LBB4_2: # %cond_false 100 ; CHECK-NEXT: movl $42, %eax 101 ; CHECK-NEXT: popl %ecx 102 ; CHECK-NEXT: retl 103 %tmp = fptosi double %d to i1 104 br i1 %tmp, label %cond_true, label %cond_false 105 cond_true: 106 ret i32 21 107 cond_false: 108 ret i32 42 109 } 110
