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|
; RUN: opt < %s -float2int -S | FileCheck %s
;
; Positive tests
;
; CHECK-LABEL: @simple1
; CHECK: %1 = zext i8 %a to i32
; CHECK: %2 = add i32 %1, 1
; CHECK: %3 = trunc i32 %2 to i16
; CHECK: ret i16 %3
define i16 @simple1(i8 %a) {
%1 = uitofp i8 %a to float
%2 = fadd float %1, 1.0
%3 = fptoui float %2 to i16
ret i16 %3
}
; CHECK-LABEL: @simple2
; CHECK: %1 = zext i8 %a to i32
; CHECK: %2 = sub i32 %1, 1
; CHECK: %3 = trunc i32 %2 to i8
; CHECK: ret i8 %3
define i8 @simple2(i8 %a) {
%1 = uitofp i8 %a to float
%2 = fsub float %1, 1.0
%3 = fptoui float %2 to i8
ret i8 %3
}
; CHECK-LABEL: @simple3
; CHECK: %1 = zext i8 %a to i32
; CHECK: %2 = sub i32 %1, 1
; CHECK: ret i32 %2
define i32 @simple3(i8 %a) {
%1 = uitofp i8 %a to float
%2 = fsub float %1, 1.0
%3 = fptoui float %2 to i32
ret i32 %3
}
; CHECK-LABEL: @cmp
; CHECK: %1 = zext i8 %a to i32
; CHECK: %2 = zext i8 %b to i32
; CHECK: %3 = icmp slt i32 %1, %2
; CHECK: ret i1 %3
define i1 @cmp(i8 %a, i8 %b) {
%1 = uitofp i8 %a to float
%2 = uitofp i8 %b to float
%3 = fcmp ult float %1, %2
ret i1 %3
}
; CHECK-LABEL: @simple4
; CHECK: %1 = zext i32 %a to i64
; CHECK: %2 = add i64 %1, 1
; CHECK: %3 = trunc i64 %2 to i32
; CHECK: ret i32 %3
define i32 @simple4(i32 %a) {
%1 = uitofp i32 %a to double
%2 = fadd double %1, 1.0
%3 = fptoui double %2 to i32
ret i32 %3
}
; CHECK-LABEL: @simple5
; CHECK: %1 = zext i8 %a to i32
; CHECK: %2 = zext i8 %b to i32
; CHECK: %3 = add i32 %1, 1
; CHECK: %4 = mul i32 %3, %2
; CHECK: ret i32 %4
define i32 @simple5(i8 %a, i8 %b) {
%1 = uitofp i8 %a to float
%2 = uitofp i8 %b to float
%3 = fadd float %1, 1.0
%4 = fmul float %3, %2
%5 = fptoui float %4 to i32
ret i32 %5
}
; The two chains don't interact - failure of one shouldn't
; cause failure of the other.
; CHECK-LABEL: @multi1
; CHECK: %1 = zext i8 %a to i32
; CHECK: %2 = zext i8 %b to i32
; CHECK: %fc = uitofp i8 %c to float
; CHECK: %x1 = add i32 %1, %2
; CHECK: %z = fadd float %fc, %d
; CHECK: %w = fptoui float %z to i32
; CHECK: %r = add i32 %x1, %w
; CHECK: ret i32 %r
define i32 @multi1(i8 %a, i8 %b, i8 %c, float %d) {
%fa = uitofp i8 %a to float
%fb = uitofp i8 %b to float
%fc = uitofp i8 %c to float
%x = fadd float %fa, %fb
%y = fptoui float %x to i32
%z = fadd float %fc, %d
%w = fptoui float %z to i32
%r = add i32 %y, %w
ret i32 %r
}
; CHECK-LABEL: @simple_negzero
; CHECK: %1 = zext i8 %a to i32
; CHECK: %2 = add i32 %1, 0
; CHECK: %3 = trunc i32 %2 to i16
; CHECK: ret i16 %3
define i16 @simple_negzero(i8 %a) {
%1 = uitofp i8 %a to float
%2 = fadd fast float %1, -0.0
%3 = fptoui float %2 to i16
ret i16 %3
}
; CHECK-LABEL: @simple_negative
; CHECK: %1 = sext i8 %call to i32
; CHECK: %mul1 = mul i32 %1, -3
; CHECK: %2 = trunc i32 %mul1 to i8
; CHECK: %conv3 = sext i8 %2 to i32
; CHECK: ret i32 %conv3
define i32 @simple_negative(i8 %call) {
%conv1 = sitofp i8 %call to float
%mul = fmul float %conv1, -3.000000e+00
%conv2 = fptosi float %mul to i8
%conv3 = sext i8 %conv2 to i32
ret i32 %conv3
}
;
; Negative tests
;
; CHECK-LABEL: @neg_multi1
; CHECK: %fa = uitofp i8 %a to float
; CHECK: %fc = uitofp i8 %c to float
; CHECK: %x = fadd float %fa, %fc
; CHECK: %y = fptoui float %x to i32
; CHECK: %z = fadd float %fc, %d
; CHECK: %w = fptoui float %z to i32
; CHECK: %r = add i32 %y, %w
; CHECK: ret i32 %r
; The two chains intersect, which means because one fails, no
; transform can occur.
define i32 @neg_multi1(i8 %a, i8 %b, i8 %c, float %d) {
%fa = uitofp i8 %a to float
%fc = uitofp i8 %c to float
%x = fadd float %fa, %fc
%y = fptoui float %x to i32
%z = fadd float %fc, %d
%w = fptoui float %z to i32
%r = add i32 %y, %w
ret i32 %r
}
; CHECK-LABEL: @neg_muld
; CHECK: %fa = uitofp i32 %a to double
; CHECK: %fb = uitofp i32 %b to double
; CHECK: %mul = fmul double %fa, %fb
; CHECK: %r = fptoui double %mul to i64
; CHECK: ret i64 %r
; The i32 * i32 = i64, which has 64 bits, which is greater than the 52 bits
; that can be exactly represented in a double.
define i64 @neg_muld(i32 %a, i32 %b) {
%fa = uitofp i32 %a to double
%fb = uitofp i32 %b to double
%mul = fmul double %fa, %fb
%r = fptoui double %mul to i64
ret i64 %r
}
; CHECK-LABEL: @neg_mulf
; CHECK: %fa = uitofp i16 %a to float
; CHECK: %fb = uitofp i16 %b to float
; CHECK: %mul = fmul float %fa, %fb
; CHECK: %r = fptoui float %mul to i32
; CHECK: ret i32 %r
; The i16 * i16 = i32, which can't be represented in a float, but can in a
; double. This should fail, as the written code uses floats, not doubles so
; the original result may be inaccurate.
define i32 @neg_mulf(i16 %a, i16 %b) {
%fa = uitofp i16 %a to float
%fb = uitofp i16 %b to float
%mul = fmul float %fa, %fb
%r = fptoui float %mul to i32
ret i32 %r
}
; CHECK-LABEL: @neg_cmp
; CHECK: %1 = uitofp i8 %a to float
; CHECK: %2 = uitofp i8 %b to float
; CHECK: %3 = fcmp false float %1, %2
; CHECK: ret i1 %3
; "false" doesn't have an icmp equivalent.
define i1 @neg_cmp(i8 %a, i8 %b) {
%1 = uitofp i8 %a to float
%2 = uitofp i8 %b to float
%3 = fcmp false float %1, %2
ret i1 %3
}
; CHECK-LABEL: @neg_div
; CHECK: %1 = uitofp i8 %a to float
; CHECK: %2 = fdiv float %1, 1.0
; CHECK: %3 = fptoui float %2 to i16
; CHECK: ret i16 %3
; Division isn't a supported operator.
define i16 @neg_div(i8 %a) {
%1 = uitofp i8 %a to float
%2 = fdiv float %1, 1.0
%3 = fptoui float %2 to i16
ret i16 %3
}
; CHECK-LABEL: @neg_remainder
; CHECK: %1 = uitofp i8 %a to float
; CHECK: %2 = fadd float %1, 1.2
; CHECK: %3 = fptoui float %2 to i16
; CHECK: ret i16 %3
; 1.2 is not an integer.
define i16 @neg_remainder(i8 %a) {
%1 = uitofp i8 %a to float
%2 = fadd float %1, 1.25
%3 = fptoui float %2 to i16
ret i16 %3
}
; CHECK-LABEL: @neg_toolarge
; CHECK: %1 = uitofp i80 %a to fp128
; CHECK: %2 = fadd fp128 %1, %1
; CHECK: %3 = fptoui fp128 %2 to i80
; CHECK: ret i80 %3
; i80 > i64, which is the largest bitwidth handleable by default.
define i80 @neg_toolarge(i80 %a) {
%1 = uitofp i80 %a to fp128
%2 = fadd fp128 %1, %1
%3 = fptoui fp128 %2 to i80
ret i80 %3
}
; CHECK-LABEL: @neg_calluser
; CHECK: sitofp
; CHECK: fcmp
; The sequence %1..%3 cannot be converted because %4 uses %2.
define i32 @neg_calluser(i32 %value) {
%1 = sitofp i32 %value to double
%2 = fadd double %1, 1.0
%3 = fcmp olt double %2, 0.000000e+00
%4 = tail call double @g(double %2)
%5 = fptosi double %4 to i32
%6 = zext i1 %3 to i32
%7 = add i32 %6, %5
ret i32 %7
}
declare double @g(double)
|
