forked from OSchip/llvm-project
[InstCombine] add tests for bswap with shifted operand; NFC
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Sanjay Patel
parent
d50298dded
commit
1f001b25f1
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@ -3,27 +3,152 @@
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; rdar://5992453
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; A & 255
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define i32 @test4(i32 %a) nounwind {
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define i32 @test4(i32 %a) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[T2:%.*]] = and i32 [[A:%.*]], 255
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; CHECK-NEXT: ret i32 [[T2]]
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;
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%t2 = tail call i32 @llvm.bswap.i32( i32 %a )
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%t2 = call i32 @llvm.bswap.i32( i32 %a )
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%t4 = lshr i32 %t2, 24
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ret i32 %t4
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}
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; a >> 24
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define i32 @test6(i32 %a) nounwind {
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define i32 @test6(i32 %a) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[T2:%.*]] = lshr i32 [[A:%.*]], 24
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; CHECK-NEXT: ret i32 [[T2]]
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;
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%t2 = tail call i32 @llvm.bswap.i32( i32 %a )
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%t2 = call i32 @llvm.bswap.i32( i32 %a )
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%t4 = and i32 %t2, 255
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ret i32 %t4
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}
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define i32 @lshr8_i32(i32 %x) {
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; CHECK-LABEL: @lshr8_i32(
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; CHECK-NEXT: [[S:%.*]] = lshr i32 [[X:%.*]], 8
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; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.bswap.i32(i32 [[S]])
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; CHECK-NEXT: ret i32 [[R]]
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;
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%s = lshr i32 %x, 8
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%r = call i32 @llvm.bswap.i32(i32 %s)
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ret i32 %r
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}
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define <2 x i32> @lshr16_v2i32(<2 x i32> %x) {
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; CHECK-LABEL: @lshr16_v2i32(
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; CHECK-NEXT: [[S:%.*]] = lshr <2 x i32> [[X:%.*]], <i32 16, i32 16>
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; CHECK-NEXT: [[R:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[S]])
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; CHECK-NEXT: ret <2 x i32> [[R]]
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;
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%s = lshr <2 x i32> %x, <i32 16, i32 16>
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%r = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %s)
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ret <2 x i32> %r
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}
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define i32 @lshr24_i32(i32 %x) {
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; CHECK-LABEL: @lshr24_i32(
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; CHECK-NEXT: [[S:%.*]] = and i32 [[X:%.*]], -16777216
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; CHECK-NEXT: ret i32 [[S]]
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;
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%s = lshr i32 %x, 24
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%r = call i32 @llvm.bswap.i32(i32 %s)
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ret i32 %r
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}
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define i32 @lshr12_i32(i32 %x) {
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; CHECK-LABEL: @lshr12_i32(
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; CHECK-NEXT: [[S:%.*]] = lshr i32 [[X:%.*]], 12
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; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.bswap.i32(i32 [[S]])
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; CHECK-NEXT: ret i32 [[R]]
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;
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%s = lshr i32 %x, 12
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%r = call i32 @llvm.bswap.i32(i32 %s)
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ret i32 %r
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}
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define i32 @lshr8_i32_use(i32 %x, i32* %p) {
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; CHECK-LABEL: @lshr8_i32_use(
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; CHECK-NEXT: [[S:%.*]] = lshr i32 [[X:%.*]], 12
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; CHECK-NEXT: store i32 [[S]], i32* [[P:%.*]], align 4
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; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.bswap.i32(i32 [[S]])
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; CHECK-NEXT: ret i32 [[R]]
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;
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%s = lshr i32 %x, 12
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store i32 %s, i32* %p
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%r = call i32 @llvm.bswap.i32(i32 %s)
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ret i32 %r
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}
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define i64 @shl16_i64(i64 %x) {
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; CHECK-LABEL: @shl16_i64(
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; CHECK-NEXT: [[S:%.*]] = shl i64 [[X:%.*]], 16
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; CHECK-NEXT: [[R:%.*]] = call i64 @llvm.bswap.i64(i64 [[S]])
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; CHECK-NEXT: ret i64 [[R]]
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;
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%s = shl i64 %x, 16
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%r = call i64 @llvm.bswap.i64(i64 %s)
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ret i64 %r
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}
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define <2 x i64> @shl16_v2i64(<2 x i64> %x) {
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; CHECK-LABEL: @shl16_v2i64(
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; CHECK-NEXT: [[S:%.*]] = shl <2 x i64> [[X:%.*]], <i64 poison, i64 24>
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; CHECK-NEXT: [[R:%.*]] = call <2 x i64> @llvm.bswap.v2i64(<2 x i64> [[S]])
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; CHECK-NEXT: ret <2 x i64> [[R]]
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;
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%s = shl <2 x i64> %x, <i64 poison, i64 24>
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%r = call <2 x i64> @llvm.bswap.v2i64(<2 x i64> %s)
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ret <2 x i64> %r
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}
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define i64 @shl56_i64(i64 %x) {
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; CHECK-LABEL: @shl56_i64(
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; CHECK-NEXT: [[S:%.*]] = and i64 [[X:%.*]], 255
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; CHECK-NEXT: ret i64 [[S]]
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;
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%s = shl i64 %x, 56
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%r = call i64 @llvm.bswap.i64(i64 %s)
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ret i64 %r
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}
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define i64 @shl42_i64(i64 %x) {
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; CHECK-LABEL: @shl42_i64(
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; CHECK-NEXT: [[S:%.*]] = shl i64 [[X:%.*]], 42
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; CHECK-NEXT: [[R:%.*]] = call i64 @llvm.bswap.i64(i64 [[S]])
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; CHECK-NEXT: ret i64 [[R]]
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;
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%s = shl i64 %x, 42
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%r = call i64 @llvm.bswap.i64(i64 %s)
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ret i64 %r
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}
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define i32 @shl8_i32_use(i32 %x, i32* %p) {
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; CHECK-LABEL: @shl8_i32_use(
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; CHECK-NEXT: [[S:%.*]] = shl i32 [[X:%.*]], 8
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; CHECK-NEXT: store i32 [[S]], i32* [[P:%.*]], align 4
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; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.bswap.i32(i32 [[S]])
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; CHECK-NEXT: ret i32 [[R]]
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;
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%s = shl i32 %x, 8
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store i32 %s, i32* %p
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%r = call i32 @llvm.bswap.i32(i32 %s)
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ret i32 %r
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}
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define i64 @swap_shl16_i64(i64 %x) {
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; CHECK-LABEL: @swap_shl16_i64(
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; CHECK-NEXT: [[B:%.*]] = call i64 @llvm.bswap.i64(i64 [[X:%.*]])
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; CHECK-NEXT: [[S:%.*]] = shl i64 [[B]], 16
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; CHECK-NEXT: [[R:%.*]] = call i64 @llvm.bswap.i64(i64 [[S]])
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; CHECK-NEXT: ret i64 [[R]]
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;
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%b = call i64 @llvm.bswap.i64(i64 %x)
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%s = shl i64 %b, 16
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%r = call i64 @llvm.bswap.i64(i64 %s)
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ret i64 %r
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}
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; PR5284
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define i16 @test7(i32 %A) {
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; CHECK-LABEL: @test7(
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