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64 lines
1.3 KiB
64 lines
1.3 KiB
4 months ago
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; Test shortening of NILL to NILF when the result is used as a shift amount.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Test logical shift right.
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define i32 @f1(i32 %a, i32 %sh) {
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; CHECK-LABEL: f1:
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; CHECK: nill %r3, 31
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; CHECK: srl %r2, 0(%r3)
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%and = and i32 %sh, 31
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%shift = lshr i32 %a, %and
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ret i32 %shift
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}
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; Test arithmetic shift right.
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define i32 @f2(i32 %a, i32 %sh) {
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; CHECK-LABEL: f2:
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; CHECK: nill %r3, 31
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; CHECK: sra %r2, 0(%r3)
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%and = and i32 %sh, 31
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%shift = ashr i32 %a, %and
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ret i32 %shift
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}
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; Test shift left.
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define i32 @f3(i32 %a, i32 %sh) {
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; CHECK-LABEL: f3:
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; CHECK: nill %r3, 31
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; CHECK: sll %r2, 0(%r3)
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%and = and i32 %sh, 31
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%shift = shl i32 %a, %and
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ret i32 %shift
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}
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; Test 64-bit logical shift right.
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define i64 @f4(i64 %a, i64 %sh) {
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; CHECK-LABEL: f4:
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; CHECK: nill %r3, 31
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; CHECK: srlg %r2, %r2, 0(%r3)
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%and = and i64 %sh, 31
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%shift = lshr i64 %a, %and
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ret i64 %shift
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}
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; Test 64-bit arithmetic shift right.
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define i64 @f5(i64 %a, i64 %sh) {
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; CHECK-LABEL: f5:
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; CHECK: nill %r3, 31
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; CHECK: srag %r2, %r2, 0(%r3)
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%and = and i64 %sh, 31
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%shift = ashr i64 %a, %and
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ret i64 %shift
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}
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; Test 64-bit shift left.
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define i64 @f6(i64 %a, i64 %sh) {
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; CHECK-LABEL: f6:
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; CHECK: nill %r3, 31
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; CHECK: sllg %r2, %r2, 0(%r3)
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%and = and i64 %sh, 31
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%shift = shl i64 %a, %and
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ret i64 %shift
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}
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