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; An integer truncation to i1 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: llc < %s -march=x86 | FileCheck %s
define zeroext i1 @test1(i32 %X) nounwind {
%Y = trunc i32 %X to i1
ret i1 %Y
}
; CHECK-LABEL: test1:
; CHECK: andl $1, %eax
define i1 @test2(i32 %val, i32 %mask) nounwind {
entry:
%shifted = ashr i32 %val, %mask
%anded = and i32 %shifted, 1
%trunced = trunc i32 %anded to i1
br i1 %trunced, label %ret_true, label %ret_false
ret_true:
ret i1 true
ret_false:
ret i1 false
}
; CHECK-LABEL: test2:
; CHECK: btl
define i32 @test3(i8* %ptr) nounwind {
%val = load i8, i8* %ptr
%tmp = trunc i8 %val to i1
br i1 %tmp, label %cond_true, label %cond_false
cond_true:
ret i32 21
cond_false:
ret i32 42
}
; CHECK-LABEL: test3:
; CHECK: testb $1, (%eax)
define i32 @test4(i8* %ptr) nounwind {
%tmp = ptrtoint i8* %ptr to i1
br i1 %tmp, label %cond_true, label %cond_false
cond_true:
ret i32 21
cond_false:
ret i32 42
}
; CHECK-LABEL: test4:
; CHECK: testb $1, 4(%esp)
define i32 @test5(double %d) nounwind {
%tmp = fptosi double %d to i1
br i1 %tmp, label %cond_true, label %cond_false
cond_true:
ret i32 21
cond_false:
ret i32 42
}
; CHECK-LABEL: test5:
; CHECK: testb $1
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