mirror of
https://github.com/c64scene-ar/llvm-6502.git
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e2d6f91d63
For some reason I never got around to adding these at the same time as the signed versions. No idea why. I'm not sure whether this SystemZII::BranchC* stuff is useful, or whether it should just be replaced with an "is normal" flag. I'll leave that for later though. There are some boundary conditions that can be tweaked, such as preferring unsigned comparisons for equality with [128, 256), and "<= 255" over "< 256", but again I'll leave those for a separate patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190930 91177308-0d34-0410-b5e6-96231b3b80d8
221 lines
6.0 KiB
LLVM
221 lines
6.0 KiB
LLVM
; Test 32-bit ordered comparisons that are really between a memory byte
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; and a constant.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check unsigned comparison near the low end of the CLI range, using zero
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; extension.
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define double @f1(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f1:
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; CHECK: cli 0(%r2), 1
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; CHECK-NEXT: jh
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = zext i8 %val to i32
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%cond = icmp ugt i32 %ext, 1
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check unsigned comparison near the low end of the CLI range, using sign
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; extension.
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define double @f2(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK: cli 0(%r2), 1
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; CHECK-NEXT: jh
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp ugt i32 %ext, 1
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check unsigned comparison near the high end of the CLI range, using zero
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; extension.
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define double @f3(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f3:
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; CHECK: cli 0(%r2), 254
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; CHECK-NEXT: jl
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = zext i8 %val to i32
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%cond = icmp ult i32 %ext, 254
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check unsigned comparison near the high end of the CLI range, using sign
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; extension.
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define double @f4(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f4:
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; CHECK: cli 0(%r2), 254
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; CHECK-NEXT: jl
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp ult i32 %ext, -2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check unsigned comparison above the high end of the CLI range, using zero
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; extension. The condition is always true.
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define double @f5(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f5:
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; CHECK-NOT: cli {{.*}}
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = zext i8 %val to i32
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%cond = icmp ult i32 %ext, 256
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; When using unsigned comparison with sign extension, equality with values
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; in the range [128, MAX-129] is impossible, and ordered comparisons with
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; those values are effectively sign tests. Since such comparisons are
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; unlikely to occur in practice, we don't bother optimizing the second case,
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; and simply ignore CLI for this range. First check the low end of the range.
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define double @f6(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f6:
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; CHECK-NOT: cli {{.*}}
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp ult i32 %ext, 128
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; ...and then the high end.
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define double @f7(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f7:
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; CHECK-NOT: cli {{.*}}
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp ult i32 %ext, -129
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check signed comparison near the low end of the CLI range, using zero
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; extension. This is equivalent to unsigned comparison.
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define double @f8(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f8:
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; CHECK: cli 0(%r2), 1
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; CHECK-NEXT: jh
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = zext i8 %val to i32
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%cond = icmp sgt i32 %ext, 1
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check signed comparison near the low end of the CLI range, using sign
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; extension. This cannot use CLI.
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define double @f9(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f9:
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; CHECK-NOT: cli {{.*}}
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp sgt i32 %ext, 1
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check signed comparison near the high end of the CLI range, using zero
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; extension. This is equivalent to unsigned comparison.
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define double @f10(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f10:
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; CHECK: cli 0(%r2), 254
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; CHECK-NEXT: jl
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = zext i8 %val to i32
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%cond = icmp slt i32 %ext, 254
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check signed comparison near the high end of the CLI range, using sign
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; extension. This cannot use CLI.
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define double @f11(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f11:
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; CHECK-NOT: cli {{.*}}
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp slt i32 %ext, -2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check signed comparison above the high end of the CLI range, using zero
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; extension. The condition is always true.
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define double @f12(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f12:
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; CHECK-NOT: cli {{.*}}
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = zext i8 %val to i32
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%cond = icmp slt i32 %ext, 256
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check tests for nonnegative values.
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define double @f13(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f13:
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; CHECK: cli 0(%r2), 128
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; CHECK-NEXT: jl
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp sge i32 %ext, 0
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; ...and another form
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define double @f14(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f14:
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; CHECK: cli 0(%r2), 128
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; CHECK-NEXT: jl
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp sgt i32 %ext, -1
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check tests for negative values.
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define double @f15(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f15:
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; CHECK: cli 0(%r2), 127
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; CHECK-NEXT: jh
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp slt i32 %ext, 0
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; ...and another form
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define double @f16(double %a, double %b, i8 *%ptr) {
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; CHECK-LABEL: f16:
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; CHECK: cli 0(%r2), 127
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; CHECK-NEXT: jh
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; CHECK: br %r14
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%val = load i8 *%ptr
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%ext = sext i8 %val to i32
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%cond = icmp sle i32 %ext, -1
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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