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55 lines
1.2 KiB
LLVM
55 lines
1.2 KiB
LLVM
; An integer truncation to i1 should be done with an and instruction to make
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; sure only the LSBit survives. Test that this is the case both for a returned
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; value and as the operand of a branch.
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; RUN: llc < %s -march=x86 | FileCheck %s
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define i1 @test1(i32 %X) zeroext {
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%Y = trunc i32 %X to i1
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ret i1 %Y
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}
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; CHECK: andl $1, %eax
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define i1 @test2(i32 %val, i32 %mask) {
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entry:
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%shifted = ashr i32 %val, %mask
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%anded = and i32 %shifted, 1
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%trunced = trunc i32 %anded to i1
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br i1 %trunced, label %ret_true, label %ret_false
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ret_true:
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ret i1 true
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ret_false:
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ret i1 false
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}
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; CHECK: testb $1, %al
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define i32 @test3(i8* %ptr) {
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%val = load i8* %ptr
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%tmp = trunc i8 %val to i1
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br i1 %tmp, label %cond_true, label %cond_false
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cond_true:
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ret i32 21
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cond_false:
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ret i32 42
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}
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; CHECK: testb $1, %al
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define i32 @test4(i8* %ptr) {
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%tmp = ptrtoint i8* %ptr to i1
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br i1 %tmp, label %cond_true, label %cond_false
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cond_true:
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ret i32 21
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cond_false:
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ret i32 42
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}
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; CHECK: testb $1, %al
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define i32 @test6(double %d) {
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%tmp = fptosi double %d to i1
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br i1 %tmp, label %cond_true, label %cond_false
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cond_true:
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ret i32 21
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cond_false:
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ret i32 42
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}
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; CHECK: testb $1
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