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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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