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50a6f85c7a
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. llvm-svn: 197236
148 lines
3.3 KiB
LLVM
148 lines
3.3 KiB
LLVM
; Test 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 absolute using slt.
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define i32 @f1(i32 %val) {
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; CHECK-LABEL: f1:
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; CHECK: lpr %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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%res = select i1 %cmp, i32 %neg, i32 %val
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ret i32 %res
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}
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; Test i32->i32 absolute using sle.
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define i32 @f2(i32 %val) {
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; CHECK-LABEL: f2:
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; CHECK: lpr %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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%res = select i1 %cmp, i32 %neg, i32 %val
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ret i32 %res
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}
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; Test i32->i32 absolute using sgt.
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define i32 @f3(i32 %val) {
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; CHECK-LABEL: f3:
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; CHECK: lpr %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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%res = select i1 %cmp, i32 %val, i32 %neg
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ret i32 %res
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}
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; Test i32->i32 absolute using sge.
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define i32 @f4(i32 %val) {
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; CHECK-LABEL: f4:
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; CHECK: lpr %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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%res = select i1 %cmp, i32 %val, i32 %neg
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ret i32 %res
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}
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; Test i32->i64 absolute.
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define i64 @f5(i32 %val) {
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; CHECK-LABEL: f5:
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; CHECK: lpgfr %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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%res = select i1 %cmp, i64 %neg, i64 %ext
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ret i64 %res
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}
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; Test i32->i64 absolute that uses an "in-register" form of sign extension.
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define i64 @f6(i64 %val) {
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; CHECK-LABEL: f6:
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; CHECK: lpgfr %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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%res = select i1 %cmp, i64 %neg, i64 %ext
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ret i64 %res
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}
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; Test i64 absolute.
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define i64 @f7(i64 %val) {
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; CHECK-LABEL: f7:
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; CHECK: lpgr %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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%res = select i1 %cmp, i64 %neg, i64 %val
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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: lpgfr %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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ret i64 %abs
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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: lpgfr %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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ret i64 %abs
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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: lpgfr %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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ret i64 %abs
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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: lpgfr %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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ret i64 %abs
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}
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; Repeat f5 with the comparison on the unextended value.
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define i64 @f12(i32 %val) {
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; CHECK-LABEL: f12:
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; CHECK: lpgfr %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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ret i64 %abs
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}
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