; 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: llvm-as < %s | llc -march=x86 &&
-; RUN: llvm-as < %s | llc -march=x86 | grep '\(and\)\|\(test.*\$1\)' | \
-; RUN: wc -l | grep 6
+; RUN: llc < %s -march=x86 | FileCheck %s
-define i1 @test1(i32 %X) zext {
+define zeroext i1 @test1(i32 %X) nounwind {
%Y = trunc i32 %X to i1
ret i1 %Y
}
+; CHECK: test1:
+; CHECK: andl $1, %eax
-define i1 @test2(i32 %val, i32 %mask) {
+define i1 @test2(i32 %val, i32 %mask) nounwind {
entry:
- %maski8 = trunc i32 %mask to i8
- %shifted = ashr i32 %val, i8 %maski8
+ %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_false:
ret i1 false
}
+; CHECK: test2:
+; CHECK: btl %eax
-define i32 @test3(i8* %ptr) {
+define i32 @test3(i8* %ptr) nounwind {
%val = load i8* %ptr
%tmp = trunc i8 %val to i1
br i1 %tmp, label %cond_true, label %cond_false
cond_false:
ret i32 42
}
+; CHECK: test3:
+; CHECK: testb $1, (%eax)
-define i32 @test4(i8* %ptr) {
+define i32 @test4(i8* %ptr) nounwind {
%tmp = ptrtoint i8* %ptr to i1
br i1 %tmp, label %cond_true, label %cond_false
cond_true:
cond_false:
ret i32 42
}
+; CHECK: test4:
+; CHECK: testb $1, 4(%esp)
-define i32 @test5(float %f) {
- %tmp = fptoui float %f to i1
- br i1 %tmp, label %cond_true, label %cond_false
-cond_true:
- ret i32 21
-cond_false:
- ret i32 42
-}
-
-define i32 @test6(double %d) {
+define i32 @test5(double %d) nounwind {
%tmp = fptosi double %d to i1
br i1 %tmp, label %cond_true, label %cond_false
cond_true:
cond_false:
ret i32 42
}
-
+; CHECK: test5:
+; CHECK: testb $1