mirror of
https://github.com/c64scene-ar/llvm-6502.git
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fb45b9fafc
This re-adds float2int to the tree, after fixing PR23038. It turns out the argument to APSInt() is true-if-unsigned, rather than true-if-signed :(. Added testcase and explanatory comment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233370 91177308-0d34-0410-b5e6-96231b3b80d8
257 lines
6.5 KiB
LLVM
257 lines
6.5 KiB
LLVM
; RUN: opt < %s -float2int -S | FileCheck %s
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;
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; Positive tests
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;
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; CHECK-LABEL: @simple1
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; CHECK: %1 = zext i8 %a to i32
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; CHECK: %2 = add i32 %1, 1
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; CHECK: %3 = trunc i32 %2 to i16
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; CHECK: ret i16 %3
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define i16 @simple1(i8 %a) {
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%1 = uitofp i8 %a to float
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%2 = fadd float %1, 1.0
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%3 = fptoui float %2 to i16
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ret i16 %3
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}
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; CHECK-LABEL: @simple2
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; CHECK: %1 = zext i8 %a to i32
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; CHECK: %2 = sub i32 %1, 1
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; CHECK: %3 = trunc i32 %2 to i8
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; CHECK: ret i8 %3
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define i8 @simple2(i8 %a) {
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%1 = uitofp i8 %a to float
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%2 = fsub float %1, 1.0
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%3 = fptoui float %2 to i8
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ret i8 %3
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}
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; CHECK-LABEL: @simple3
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; CHECK: %1 = zext i8 %a to i32
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; CHECK: %2 = sub i32 %1, 1
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; CHECK: ret i32 %2
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define i32 @simple3(i8 %a) {
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%1 = uitofp i8 %a to float
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%2 = fsub float %1, 1.0
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%3 = fptoui float %2 to i32
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ret i32 %3
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}
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; CHECK-LABEL: @cmp
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; CHECK: %1 = zext i8 %a to i32
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; CHECK: %2 = zext i8 %b to i32
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; CHECK: %3 = icmp slt i32 %1, %2
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; CHECK: ret i1 %3
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define i1 @cmp(i8 %a, i8 %b) {
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%1 = uitofp i8 %a to float
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%2 = uitofp i8 %b to float
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%3 = fcmp ult float %1, %2
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ret i1 %3
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}
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; CHECK-LABEL: @simple4
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; CHECK: %1 = zext i32 %a to i64
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; CHECK: %2 = add i64 %1, 1
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; CHECK: %3 = trunc i64 %2 to i32
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; CHECK: ret i32 %3
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define i32 @simple4(i32 %a) {
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%1 = uitofp i32 %a to double
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%2 = fadd double %1, 1.0
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%3 = fptoui double %2 to i32
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ret i32 %3
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}
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; CHECK-LABEL: @simple5
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; CHECK: %1 = zext i8 %a to i32
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; CHECK: %2 = zext i8 %b to i32
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; CHECK: %3 = add i32 %1, 1
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; CHECK: %4 = mul i32 %3, %2
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; CHECK: ret i32 %4
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define i32 @simple5(i8 %a, i8 %b) {
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%1 = uitofp i8 %a to float
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%2 = uitofp i8 %b to float
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%3 = fadd float %1, 1.0
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%4 = fmul float %3, %2
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%5 = fptoui float %4 to i32
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ret i32 %5
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}
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; The two chains don't interact - failure of one shouldn't
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; cause failure of the other.
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; CHECK-LABEL: @multi1
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; CHECK: %1 = zext i8 %a to i32
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; CHECK: %2 = zext i8 %b to i32
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; CHECK: %fc = uitofp i8 %c to float
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; CHECK: %x1 = add i32 %1, %2
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; CHECK: %z = fadd float %fc, %d
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; CHECK: %w = fptoui float %z to i32
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; CHECK: %r = add i32 %x1, %w
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; CHECK: ret i32 %r
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define i32 @multi1(i8 %a, i8 %b, i8 %c, float %d) {
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%fa = uitofp i8 %a to float
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%fb = uitofp i8 %b to float
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%fc = uitofp i8 %c to float
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%x = fadd float %fa, %fb
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%y = fptoui float %x to i32
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%z = fadd float %fc, %d
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%w = fptoui float %z to i32
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%r = add i32 %y, %w
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ret i32 %r
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}
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; CHECK-LABEL: @simple_negzero
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; CHECK: %1 = zext i8 %a to i32
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; CHECK: %2 = add i32 %1, 0
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; CHECK: %3 = trunc i32 %2 to i16
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; CHECK: ret i16 %3
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define i16 @simple_negzero(i8 %a) {
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%1 = uitofp i8 %a to float
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%2 = fadd fast float %1, -0.0
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%3 = fptoui float %2 to i16
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ret i16 %3
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}
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; CHECK-LABEL: @simple_negative
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; CHECK: %1 = sext i8 %call to i32
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; CHECK: %mul1 = mul i32 %1, -3
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; CHECK: %2 = trunc i32 %mul1 to i8
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; CHECK: %conv3 = sext i8 %2 to i32
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; CHECK: ret i32 %conv3
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define i32 @simple_negative(i8 %call) {
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%conv1 = sitofp i8 %call to float
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%mul = fmul float %conv1, -3.000000e+00
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%conv2 = fptosi float %mul to i8
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%conv3 = sext i8 %conv2 to i32
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ret i32 %conv3
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}
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;
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; Negative tests
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;
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; CHECK-LABEL: @neg_multi1
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; CHECK: %fa = uitofp i8 %a to float
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; CHECK: %fc = uitofp i8 %c to float
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; CHECK: %x = fadd float %fa, %fc
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; CHECK: %y = fptoui float %x to i32
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; CHECK: %z = fadd float %fc, %d
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; CHECK: %w = fptoui float %z to i32
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; CHECK: %r = add i32 %y, %w
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; CHECK: ret i32 %r
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; The two chains intersect, which means because one fails, no
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; transform can occur.
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define i32 @neg_multi1(i8 %a, i8 %b, i8 %c, float %d) {
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%fa = uitofp i8 %a to float
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%fc = uitofp i8 %c to float
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%x = fadd float %fa, %fc
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%y = fptoui float %x to i32
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%z = fadd float %fc, %d
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%w = fptoui float %z to i32
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%r = add i32 %y, %w
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ret i32 %r
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}
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; CHECK-LABEL: @neg_muld
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; CHECK: %fa = uitofp i32 %a to double
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; CHECK: %fb = uitofp i32 %b to double
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; CHECK: %mul = fmul double %fa, %fb
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; CHECK: %r = fptoui double %mul to i64
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; CHECK: ret i64 %r
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; The i32 * i32 = i64, which has 64 bits, which is greater than the 52 bits
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; that can be exactly represented in a double.
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define i64 @neg_muld(i32 %a, i32 %b) {
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%fa = uitofp i32 %a to double
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%fb = uitofp i32 %b to double
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%mul = fmul double %fa, %fb
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%r = fptoui double %mul to i64
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ret i64 %r
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}
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; CHECK-LABEL: @neg_mulf
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; CHECK: %fa = uitofp i16 %a to float
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; CHECK: %fb = uitofp i16 %b to float
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; CHECK: %mul = fmul float %fa, %fb
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; CHECK: %r = fptoui float %mul to i32
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; CHECK: ret i32 %r
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; The i16 * i16 = i32, which can't be represented in a float, but can in a
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; double. This should fail, as the written code uses floats, not doubles so
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; the original result may be inaccurate.
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define i32 @neg_mulf(i16 %a, i16 %b) {
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%fa = uitofp i16 %a to float
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%fb = uitofp i16 %b to float
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%mul = fmul float %fa, %fb
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%r = fptoui float %mul to i32
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ret i32 %r
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}
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; CHECK-LABEL: @neg_cmp
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; CHECK: %1 = uitofp i8 %a to float
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; CHECK: %2 = uitofp i8 %b to float
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; CHECK: %3 = fcmp false float %1, %2
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; CHECK: ret i1 %3
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; "false" doesn't have an icmp equivalent.
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define i1 @neg_cmp(i8 %a, i8 %b) {
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%1 = uitofp i8 %a to float
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%2 = uitofp i8 %b to float
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%3 = fcmp false float %1, %2
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ret i1 %3
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}
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; CHECK-LABEL: @neg_div
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; CHECK: %1 = uitofp i8 %a to float
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; CHECK: %2 = fdiv float %1, 1.0
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; CHECK: %3 = fptoui float %2 to i16
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; CHECK: ret i16 %3
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; Division isn't a supported operator.
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define i16 @neg_div(i8 %a) {
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%1 = uitofp i8 %a to float
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%2 = fdiv float %1, 1.0
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%3 = fptoui float %2 to i16
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ret i16 %3
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}
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; CHECK-LABEL: @neg_remainder
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; CHECK: %1 = uitofp i8 %a to float
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; CHECK: %2 = fadd float %1, 1.2
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; CHECK: %3 = fptoui float %2 to i16
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; CHECK: ret i16 %3
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; 1.2 is not an integer.
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define i16 @neg_remainder(i8 %a) {
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%1 = uitofp i8 %a to float
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%2 = fadd float %1, 1.25
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%3 = fptoui float %2 to i16
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ret i16 %3
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}
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; CHECK-LABEL: @neg_toolarge
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; CHECK: %1 = uitofp i80 %a to fp128
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; CHECK: %2 = fadd fp128 %1, %1
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; CHECK: %3 = fptoui fp128 %2 to i80
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; CHECK: ret i80 %3
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; i80 > i64, which is the largest bitwidth handleable by default.
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define i80 @neg_toolarge(i80 %a) {
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%1 = uitofp i80 %a to fp128
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%2 = fadd fp128 %1, %1
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%3 = fptoui fp128 %2 to i80
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ret i80 %3
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}
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; CHECK-LABEL: @neg_calluser
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; CHECK: sitofp
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; CHECK: fcmp
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; The sequence %1..%3 cannot be converted because %4 uses %2.
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define i32 @neg_calluser(i32 %value) {
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%1 = sitofp i32 %value to double
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%2 = fadd double %1, 1.0
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%3 = fcmp olt double %2, 0.000000e+00
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%4 = tail call double @g(double %2)
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%5 = fptosi double %4 to i32
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%6 = zext i1 %3 to i32
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%7 = add i32 %6, %5
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ret i32 %7
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}
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declare double @g(double)
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