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The combine for mul x, pow2 +/- 1 is unchanged. Test cases for both combines as well as mul x, pow2 have been added as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212044 91177308-0d34-0410-b5e6-96231b3b80d8
124 lines
2.1 KiB
LLVM
124 lines
2.1 KiB
LLVM
; RUN: llc < %s -march=aarch64 | FileCheck %s
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; Convert mul x, pow2 to shift.
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; Convert mul x, pow2 +/- 1 to shift + add/sub.
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define i32 @test2(i32 %x) {
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; CHECK-LABEL: test2
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; CHECK: lsl w0, w0, #1
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%mul = shl nsw i32 %x, 1
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ret i32 %mul
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}
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define i32 @test3(i32 %x) {
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; CHECK-LABEL: test3
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; CHECK: add w0, w0, w0, lsl #1
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%mul = mul nsw i32 %x, 3
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ret i32 %mul
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}
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define i32 @test4(i32 %x) {
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; CHECK-LABEL: test4
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; CHECK: lsl w0, w0, #2
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%mul = shl nsw i32 %x, 2
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ret i32 %mul
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}
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define i32 @test5(i32 %x) {
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; CHECK-LABEL: test5
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; CHECK: add w0, w0, w0, lsl #2
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%mul = mul nsw i32 %x, 5
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ret i32 %mul
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}
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define i32 @test7(i32 %x) {
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; CHECK-LABEL: test7
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; CHECK: lsl {{w[0-9]+}}, w0, #3
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; CHECK: sub w0, {{w[0-9]+}}, w0
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%mul = mul nsw i32 %x, 7
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ret i32 %mul
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}
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define i32 @test8(i32 %x) {
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; CHECK-LABEL: test8
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; CHECK: lsl w0, w0, #3
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%mul = shl nsw i32 %x, 3
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ret i32 %mul
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}
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define i32 @test9(i32 %x) {
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; CHECK-LABEL: test9
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; CHECK: add w0, w0, w0, lsl #3
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%mul = mul nsw i32 %x, 9
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ret i32 %mul
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}
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; Convert mul x, -pow2 to shift.
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; Convert mul x, -(pow2 +/- 1) to shift + add/sub.
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define i32 @ntest2(i32 %x) {
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; CHECK-LABEL: ntest2
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; CHECK: neg w0, w0, lsl #1
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%mul = mul nsw i32 %x, -2
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ret i32 %mul
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}
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define i32 @ntest3(i32 %x) {
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; CHECK-LABEL: ntest3
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; CHECK: add {{w[0-9]+}}, w0, w0, lsl #1
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; CHECK: neg w0, {{w[0-9]+}}
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%mul = mul nsw i32 %x, -3
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ret i32 %mul
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}
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define i32 @ntest4(i32 %x) {
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; CHECK-LABEL: ntest4
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; CHECK:neg w0, w0, lsl #2
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%mul = mul nsw i32 %x, -4
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ret i32 %mul
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}
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define i32 @ntest5(i32 %x) {
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; CHECK-LABEL: ntest5
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; CHECK: add {{w[0-9]+}}, w0, w0, lsl #2
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; CHECK: neg w0, {{w[0-9]+}}
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%mul = mul nsw i32 %x, -5
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ret i32 %mul
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}
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define i32 @ntest7(i32 %x) {
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; CHECK-LABEL: ntest7
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; CHECK: sub w0, w0, w0, lsl #3
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%mul = mul nsw i32 %x, -7
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ret i32 %mul
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}
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define i32 @ntest8(i32 %x) {
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; CHECK-LABEL: ntest8
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; CHECK: neg w0, w0, lsl #3
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%mul = mul nsw i32 %x, -8
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ret i32 %mul
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}
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define i32 @ntest9(i32 %x) {
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; CHECK-LABEL: ntest9
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; CHECK: add {{w[0-9]+}}, w0, w0, lsl #3
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; CHECK: neg w0, {{w[0-9]+}}
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%mul = mul nsw i32 %x, -9
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ret i32 %mul
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}
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