mirror of
https://github.com/c64scene-ar/llvm-6502.git
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193bf3171f
This patch makes more use of LPGFR and LNGFR. It builds on top of the LTGFR selection from r197234. Most of the tests are motivated by what InstCombine would produce. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197236 91177308-0d34-0410-b5e6-96231b3b80d8
225 lines
5.1 KiB
LLVM
225 lines
5.1 KiB
LLVM
; Test negative integer absolute.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Test i32->i32 negative absolute using slt.
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define i32 @f1(i32 %val) {
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; CHECK-LABEL: f1:
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; CHECK: lnr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp slt i32 %val, 0
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%neg = sub i32 0, %val
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%abs = select i1 %cmp, i32 %neg, i32 %val
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%res = sub i32 0, %abs
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ret i32 %res
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}
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; Test i32->i32 negative absolute using sle.
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define i32 @f2(i32 %val) {
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; CHECK-LABEL: f2:
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; CHECK: lnr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp sle i32 %val, 0
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%neg = sub i32 0, %val
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%abs = select i1 %cmp, i32 %neg, i32 %val
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%res = sub i32 0, %abs
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ret i32 %res
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}
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; Test i32->i32 negative absolute using sgt.
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define i32 @f3(i32 %val) {
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; CHECK-LABEL: f3:
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; CHECK: lnr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp sgt i32 %val, 0
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%neg = sub i32 0, %val
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%abs = select i1 %cmp, i32 %val, i32 %neg
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%res = sub i32 0, %abs
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ret i32 %res
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}
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; Test i32->i32 negative absolute using sge.
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define i32 @f4(i32 %val) {
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; CHECK-LABEL: f4:
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; CHECK: lnr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp sge i32 %val, 0
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%neg = sub i32 0, %val
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%abs = select i1 %cmp, i32 %val, i32 %neg
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%res = sub i32 0, %abs
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ret i32 %res
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}
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; Test i32->i64 negative absolute.
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define i64 @f5(i32 %val) {
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; CHECK-LABEL: f5:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%ext = sext i32 %val to i64
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%cmp = icmp slt i64 %ext, 0
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%neg = sub i64 0, %ext
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%abs = select i1 %cmp, i64 %neg, i64 %ext
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Test i32->i64 negative absolute that uses an "in-register" form of
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; sign extension.
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define i64 @f6(i64 %val) {
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; CHECK-LABEL: f6:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%trunc = trunc i64 %val to i32
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%ext = sext i32 %trunc to i64
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%cmp = icmp slt i64 %ext, 0
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%neg = sub i64 0, %ext
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%abs = select i1 %cmp, i64 %neg, i64 %ext
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Test i64 negative absolute.
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define i64 @f7(i64 %val) {
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; CHECK-LABEL: f7:
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; CHECK: lngr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp slt i64 %val, 0
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%neg = sub i64 0, %val
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%abs = select i1 %cmp, i64 %neg, i64 %val
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Test another form of f6, which is that produced by InstCombine.
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define i64 @f8(i64 %val) {
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; CHECK-LABEL: f8:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%shl = shl i64 %val, 32
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%ashr = ashr i64 %shl, 32
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%neg = sub i64 0, %ashr
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%cmp = icmp slt i64 %shl, 0
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%abs = select i1 %cmp, i64 %neg, i64 %ashr
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Try again with sle rather than slt.
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define i64 @f9(i64 %val) {
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; CHECK-LABEL: f9:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%shl = shl i64 %val, 32
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%ashr = ashr i64 %shl, 32
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%neg = sub i64 0, %ashr
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%cmp = icmp sle i64 %shl, 0
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%abs = select i1 %cmp, i64 %neg, i64 %ashr
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Repeat f8 with the operands reversed.
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define i64 @f10(i64 %val) {
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; CHECK-LABEL: f10:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%shl = shl i64 %val, 32
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%ashr = ashr i64 %shl, 32
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%neg = sub i64 0, %ashr
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%cmp = icmp sgt i64 %shl, 0
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%abs = select i1 %cmp, i64 %ashr, i64 %neg
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Try again with sge rather than sgt.
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define i64 @f11(i64 %val) {
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; CHECK-LABEL: f11:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%shl = shl i64 %val, 32
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%ashr = ashr i64 %shl, 32
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%neg = sub i64 0, %ashr
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%cmp = icmp sge i64 %shl, 0
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%abs = select i1 %cmp, i64 %ashr, i64 %neg
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Repeat f8 with the negation coming from swapped operands.
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define i64 @f12(i64 %val) {
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; CHECK-LABEL: f12:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%shl = shl i64 %val, 32
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%ashr = ashr i64 %shl, 32
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%neg = sub i64 0, %ashr
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%cmp = icmp slt i64 %shl, 0
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%negabs = select i1 %cmp, i64 %ashr, i64 %neg
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ret i64 %negabs
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}
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; Likewise f9.
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define i64 @f13(i64 %val) {
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; CHECK-LABEL: f13:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%shl = shl i64 %val, 32
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%ashr = ashr i64 %shl, 32
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%neg = sub i64 0, %ashr
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%cmp = icmp sle i64 %shl, 0
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%negabs = select i1 %cmp, i64 %ashr, i64 %neg
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ret i64 %negabs
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}
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; Likewise f10.
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define i64 @f14(i64 %val) {
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; CHECK-LABEL: f14:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%shl = shl i64 %val, 32
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%ashr = ashr i64 %shl, 32
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%neg = sub i64 0, %ashr
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%cmp = icmp sgt i64 %shl, 0
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%negabs = select i1 %cmp, i64 %neg, i64 %ashr
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ret i64 %negabs
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}
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; Likewise f11.
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define i64 @f15(i64 %val) {
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; CHECK-LABEL: f15:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%shl = shl i64 %val, 32
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%ashr = ashr i64 %shl, 32
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%neg = sub i64 0, %ashr
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%cmp = icmp sge i64 %shl, 0
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%negabs = select i1 %cmp, i64 %neg, i64 %ashr
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ret i64 %negabs
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}
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; Repeat f5 with the comparison on the unextended value.
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define i64 @f16(i32 %val) {
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; CHECK-LABEL: f16:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%ext = sext i32 %val to i64
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%cmp = icmp slt i32 %val, 0
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%neg = sub i64 0, %ext
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%abs = select i1 %cmp, i64 %neg, i64 %ext
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; And again with the negation coming from swapped operands.
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define i64 @f17(i32 %val) {
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; CHECK-LABEL: f17:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%ext = sext i32 %val to i64
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%cmp = icmp slt i32 %val, 0
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%neg = sub i64 0, %ext
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%abs = select i1 %cmp, i64 %ext, i64 %neg
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ret i64 %abs
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}
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