llvm-mirror/test/Regression/CodeGen/X86/trunc-to-bool.ll

; An integer truncation to bool should be done with an and instruction to make
; sure only the LSBit survives. Test that this is the case both for a returned
; value and as the operand of a branch.
; RUN: llvm-as < %s | llc -march=x86 &&
; RUN: llvm-as < %s | llc -march=x86 | grep '\(and\)\|\(test.*\$1\)' | \
; RUN:   wc -l | grep 6

define bool %test1(i32 %X) zext {
    %Y = trunc i32 %X to bool
    ret bool %Y
}

define bool %test2(i32 %val, i32 %mask) {
entry:
    %mask = trunc i32 %mask to i8
    %shifted = ashr i32 %val, i8 %mask
    %anded = and i32 %shifted, 1
    %trunced = trunc i32 %anded to bool
    br bool %trunced, label %ret_true, label %ret_false
ret_true:
    ret bool true
ret_false:
    ret bool false
}

define i32 %test3(i8* %ptr) {
    %val = load i8* %ptr
    %tmp = trunc i8 %val to bool
    br bool %tmp, label %cond_true, label %cond_false
cond_true:
    ret i32 21
cond_false:
    ret i32 42
}

define i32 %test4(i8* %ptr) {
    %tmp = ptrtoint i8* %ptr to bool
    br bool %tmp, label %cond_true, label %cond_false
cond_true:
    ret i32 21
cond_false:
    ret i32 42
}

define i32 %test5(float %f) {
    %tmp = fptoui float %f to bool
    br bool %tmp, label %cond_true, label %cond_false
cond_true:
    ret i32 21
cond_false:
    ret i32 42
}

define i32 %test6(double %d) {
    %tmp = fptosi double %d to bool
    br bool %tmp, label %cond_true, label %cond_false
cond_true:
    ret i32 21
cond_false:
    ret i32 42
}