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llvm-for-llvmta/test/Transforms/InstCombine/bswap-fold.ll

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; rdar://5992453
; A & 255
define i32 @test4(i32 %a) nounwind {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[T2:%.*]] = and i32 [[A:%.*]], 255
; CHECK-NEXT: ret i32 [[T2]]
;
%t2 = tail call i32 @llvm.bswap.i32( i32 %a )
%t4 = lshr i32 %t2, 24
ret i32 %t4
}
; a >> 24
define i32 @test6(i32 %a) nounwind {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[T2:%.*]] = lshr i32 [[A:%.*]], 24
; CHECK-NEXT: ret i32 [[T2]]
;
%t2 = tail call i32 @llvm.bswap.i32( i32 %a )
%t4 = and i32 %t2, 255
ret i32 %t4
}
; PR5284
define i16 @test7(i32 %A) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[A:%.*]], 16
; CHECK-NEXT: [[D:%.*]] = trunc i32 [[TMP1]] to i16
; CHECK-NEXT: ret i16 [[D]]
;
%B = tail call i32 @llvm.bswap.i32(i32 %A) nounwind
%C = trunc i32 %B to i16
%D = tail call i16 @llvm.bswap.i16(i16 %C) nounwind
ret i16 %D
}
define <2 x i16> @test7_vector(<2 x i32> %A) {
; CHECK-LABEL: @test7_vector(
; CHECK-NEXT: [[TMP1:%.*]] = lshr <2 x i32> [[A:%.*]], <i32 16, i32 16>
; CHECK-NEXT: [[D:%.*]] = trunc <2 x i32> [[TMP1]] to <2 x i16>
; CHECK-NEXT: ret <2 x i16> [[D]]
;
%B = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %A) nounwind
%C = trunc <2 x i32> %B to <2 x i16>
%D = tail call <2 x i16> @llvm.bswap.v2i16(<2 x i16> %C) nounwind
ret <2 x i16> %D
}
define i16 @test8(i64 %A) {
; CHECK-LABEL: @test8(
; CHECK-NEXT: [[TMP1:%.*]] = lshr i64 [[A:%.*]], 48
; CHECK-NEXT: [[D:%.*]] = trunc i64 [[TMP1]] to i16
; CHECK-NEXT: ret i16 [[D]]
;
%B = tail call i64 @llvm.bswap.i64(i64 %A) nounwind
%C = trunc i64 %B to i16
%D = tail call i16 @llvm.bswap.i16(i16 %C) nounwind
ret i16 %D
}
define <2 x i16> @test8_vector(<2 x i64> %A) {
; CHECK-LABEL: @test8_vector(
; CHECK-NEXT: [[TMP1:%.*]] = lshr <2 x i64> [[A:%.*]], <i64 48, i64 48>
; CHECK-NEXT: [[D:%.*]] = trunc <2 x i64> [[TMP1]] to <2 x i16>
; CHECK-NEXT: ret <2 x i16> [[D]]
;
%B = tail call <2 x i64> @llvm.bswap.v2i64(<2 x i64> %A) nounwind
%C = trunc <2 x i64> %B to <2 x i16>
%D = tail call <2 x i16> @llvm.bswap.v2i16(<2 x i16> %C) nounwind
ret <2 x i16> %D
}
; Misc: Fold bswap(undef) to undef.
define i64 @foo() {
; CHECK-LABEL: @foo(
; CHECK-NEXT: ret i64 undef
;
%a = call i64 @llvm.bswap.i64(i64 undef)
ret i64 %a
}
; PR15782
; Fold: OP( BSWAP(x), BSWAP(y) ) -> BSWAP( OP(x, y) )
; Fold: OP( BSWAP(x), CONSTANT ) -> BSWAP( OP(x, BSWAP(CONSTANT) ) )
define i16 @bs_and16i(i16 %a, i16 %b) #0 {
; CHECK-LABEL: @bs_and16i(
; CHECK-NEXT: [[TMP1:%.*]] = and i16 [[A:%.*]], 4391
; CHECK-NEXT: [[TMP2:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP1]])
; CHECK-NEXT: ret i16 [[TMP2]]
;
%1 = tail call i16 @llvm.bswap.i16(i16 %a)
%2 = and i16 %1, 10001
ret i16 %2
}
define i16 @bs_and16(i16 %a, i16 %b) #0 {
; CHECK-LABEL: @bs_and16(
; CHECK-NEXT: [[TMP1:%.*]] = and i16 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP1]])
; CHECK-NEXT: ret i16 [[TMP2]]
;
%t1 = tail call i16 @llvm.bswap.i16(i16 %a)
%t2 = tail call i16 @llvm.bswap.i16(i16 %b)
%t3 = and i16 %t1, %t2
ret i16 %t3
}
define i16 @bs_or16(i16 %a, i16 %b) #0 {
; CHECK-LABEL: @bs_or16(
; CHECK-NEXT: [[TMP1:%.*]] = or i16 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP1]])
; CHECK-NEXT: ret i16 [[TMP2]]
;
%t1 = tail call i16 @llvm.bswap.i16(i16 %a)
%t2 = tail call i16 @llvm.bswap.i16(i16 %b)
%t3 = or i16 %t1, %t2
ret i16 %t3
}
define i16 @bs_xor16(i16 %a, i16 %b) #0 {
; CHECK-LABEL: @bs_xor16(
; CHECK-NEXT: [[TMP1:%.*]] = xor i16 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP1]])
; CHECK-NEXT: ret i16 [[TMP2]]
;
%t1 = tail call i16 @llvm.bswap.i16(i16 %a)
%t2 = tail call i16 @llvm.bswap.i16(i16 %b)
%t3 = xor i16 %t1, %t2
ret i16 %t3
}
define i32 @bs_and32i(i32 %a, i32 %b) #0 {
; CHECK-LABEL: @bs_and32i(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[A:%.*]], -1585053440
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP1]])
; CHECK-NEXT: ret i32 [[TMP2]]
;
%t1 = tail call i32 @llvm.bswap.i32(i32 %a)
%t2 = and i32 %t1, 100001
ret i32 %t2
}
define i32 @bs_and32(i32 %a, i32 %b) #0 {
; CHECK-LABEL: @bs_and32(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP1]])
; CHECK-NEXT: ret i32 [[TMP2]]
;
%t1 = tail call i32 @llvm.bswap.i32(i32 %a)
%t2 = tail call i32 @llvm.bswap.i32(i32 %b)
%t3 = and i32 %t1, %t2
ret i32 %t3
}
define i32 @bs_or32(i32 %a, i32 %b) #0 {
; CHECK-LABEL: @bs_or32(
; CHECK-NEXT: [[TMP1:%.*]] = or i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP1]])
; CHECK-NEXT: ret i32 [[TMP2]]
;
%t1 = tail call i32 @llvm.bswap.i32(i32 %a)
%t2 = tail call i32 @llvm.bswap.i32(i32 %b)
%t3 = or i32 %t1, %t2
ret i32 %t3
}
define i32 @bs_xor32(i32 %a, i32 %b) #0 {
; CHECK-LABEL: @bs_xor32(
; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP1]])
; CHECK-NEXT: ret i32 [[TMP2]]
;
%t1 = tail call i32 @llvm.bswap.i32(i32 %a)
%t2 = tail call i32 @llvm.bswap.i32(i32 %b)
%t3 = xor i32 %t1, %t2
ret i32 %t3
}
define i64 @bs_and64i(i64 %a, i64 %b) #0 {
; CHECK-LABEL: @bs_and64i(
; CHECK-NEXT: [[TMP1:%.*]] = and i64 [[A:%.*]], 129085117527228416
; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP1]])
; CHECK-NEXT: ret i64 [[TMP2]]
;
%t1 = tail call i64 @llvm.bswap.i64(i64 %a)
%t2 = and i64 %t1, 1000000001
ret i64 %t2
}
define i64 @bs_and64(i64 %a, i64 %b) #0 {
; CHECK-LABEL: @bs_and64(
; CHECK-NEXT: [[TMP1:%.*]] = and i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP1]])
; CHECK-NEXT: ret i64 [[TMP2]]
;
%t1 = tail call i64 @llvm.bswap.i64(i64 %a)
%t2 = tail call i64 @llvm.bswap.i64(i64 %b)
%t3 = and i64 %t1, %t2
ret i64 %t3
}
define i64 @bs_or64(i64 %a, i64 %b) #0 {
; CHECK-LABEL: @bs_or64(
; CHECK-NEXT: [[TMP1:%.*]] = or i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP1]])
; CHECK-NEXT: ret i64 [[TMP2]]
;
%t1 = tail call i64 @llvm.bswap.i64(i64 %a)
%t2 = tail call i64 @llvm.bswap.i64(i64 %b)
%t3 = or i64 %t1, %t2
ret i64 %t3
}
define i64 @bs_xor64(i64 %a, i64 %b) #0 {
; CHECK-LABEL: @bs_xor64(
; CHECK-NEXT: [[TMP1:%.*]] = xor i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP1]])
; CHECK-NEXT: ret i64 [[TMP2]]
;
%t1 = tail call i64 @llvm.bswap.i64(i64 %a)
%t2 = tail call i64 @llvm.bswap.i64(i64 %b)
%t3 = xor i64 %t1, %t2
ret i64 %t3
}
define <2 x i32> @bs_and32vec(<2 x i32> %a, <2 x i32> %b) #0 {
; CHECK-LABEL: @bs_and32vec(
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[TMP1]])
; CHECK-NEXT: ret <2 x i32> [[TMP2]]
;
%t1 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %a)
%t2 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %b)
%t3 = and <2 x i32> %t1, %t2
ret <2 x i32> %t3
}
define <2 x i32> @bs_or32vec(<2 x i32> %a, <2 x i32> %b) #0 {
; CHECK-LABEL: @bs_or32vec(
; CHECK-NEXT: [[TMP1:%.*]] = or <2 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[TMP1]])
; CHECK-NEXT: ret <2 x i32> [[TMP2]]
;
%t1 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %a)
%t2 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %b)
%t3 = or <2 x i32> %t1, %t2
ret <2 x i32> %t3
}
define <2 x i32> @bs_xor32vec(<2 x i32> %a, <2 x i32> %b) #0 {
; CHECK-LABEL: @bs_xor32vec(
; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[TMP1]])
; CHECK-NEXT: ret <2 x i32> [[TMP2]]
;
%t1 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %a)
%t2 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %b)
%t3 = xor <2 x i32> %t1, %t2
ret <2 x i32> %t3
}
define <2 x i32> @bs_and32ivec(<2 x i32> %a, <2 x i32> %b) #0 {
; CHECK-LABEL: @bs_and32ivec(
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[A:%.*]], <i32 -1585053440, i32 -1585053440>
; CHECK-NEXT: [[TMP2:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[TMP1]])
; CHECK-NEXT: ret <2 x i32> [[TMP2]]
;
%t1 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %a)
%t2 = and <2 x i32> %t1, <i32 100001, i32 100001>
ret <2 x i32> %t2
}
define <2 x i32> @bs_or32ivec(<2 x i32> %a, <2 x i32> %b) #0 {
; CHECK-LABEL: @bs_or32ivec(
; CHECK-NEXT: [[TMP1:%.*]] = or <2 x i32> [[A:%.*]], <i32 -1585053440, i32 -1585053440>
; CHECK-NEXT: [[TMP2:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[TMP1]])
; CHECK-NEXT: ret <2 x i32> [[TMP2]]
;
%t1 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %a)
%t2 = or <2 x i32> %t1, <i32 100001, i32 100001>
ret <2 x i32> %t2
}
define <2 x i32> @bs_xor32ivec(<2 x i32> %a, <2 x i32> %b) #0 {
; CHECK-LABEL: @bs_xor32ivec(
; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> [[A:%.*]], <i32 -1585053440, i32 -1585053440>
; CHECK-NEXT: [[TMP2:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[TMP1]])
; CHECK-NEXT: ret <2 x i32> [[TMP2]]
;
%t1 = tail call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %a)
%t2 = xor <2 x i32> %t1, <i32 100001, i32 100001>
ret <2 x i32> %t2
}
define i64 @bs_and64_multiuse1(i64 %a, i64 %b) #0 {
; CHECK-LABEL: @bs_and64_multiuse1(
; CHECK-NEXT: [[T1:%.*]] = tail call i64 @llvm.bswap.i64(i64 [[A:%.*]])
; CHECK-NEXT: [[T2:%.*]] = tail call i64 @llvm.bswap.i64(i64 [[B:%.*]])
; CHECK-NEXT: [[T3:%.*]] = and i64 [[T1]], [[T2]]
; CHECK-NEXT: [[T4:%.*]] = mul i64 [[T3]], [[T1]]
; CHECK-NEXT: [[T5:%.*]] = mul i64 [[T4]], [[T2]]
; CHECK-NEXT: ret i64 [[T5]]
;
%t1 = tail call i64 @llvm.bswap.i64(i64 %a)
%t2 = tail call i64 @llvm.bswap.i64(i64 %b)
%t3 = and i64 %t1, %t2
%t4 = mul i64 %t3, %t1 ; to increase use count of the bswaps
%t5 = mul i64 %t4, %t2 ; to increase use count of the bswaps
ret i64 %t5
}
define i64 @bs_and64_multiuse2(i64 %a, i64 %b) #0 {
; CHECK-LABEL: @bs_and64_multiuse2(
; CHECK-NEXT: [[T1:%.*]] = tail call i64 @llvm.bswap.i64(i64 [[A:%.*]])
; CHECK-NEXT: [[TMP1:%.*]] = and i64 [[A]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP1]])
; CHECK-NEXT: [[T4:%.*]] = mul i64 [[TMP2]], [[T1]]
; CHECK-NEXT: ret i64 [[T4]]
;
%t1 = tail call i64 @llvm.bswap.i64(i64 %a)
%t2 = tail call i64 @llvm.bswap.i64(i64 %b)
%t3 = and i64 %t1, %t2
%t4 = mul i64 %t3, %t1 ; to increase use count of the bswaps
ret i64 %t4
}
define i64 @bs_and64_multiuse3(i64 %a, i64 %b) #0 {
; CHECK-LABEL: @bs_and64_multiuse3(
; CHECK-NEXT: [[T2:%.*]] = tail call i64 @llvm.bswap.i64(i64 [[B:%.*]])
; CHECK-NEXT: [[TMP1:%.*]] = and i64 [[A:%.*]], [[B]]
; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP1]])
; CHECK-NEXT: [[T4:%.*]] = mul i64 [[TMP2]], [[T2]]
; CHECK-NEXT: ret i64 [[T4]]
;
%t1 = tail call i64 @llvm.bswap.i64(i64 %a)
%t2 = tail call i64 @llvm.bswap.i64(i64 %b)
%t3 = and i64 %t1, %t2
%t4 = mul i64 %t3, %t2 ; to increase use count of the bswaps
ret i64 %t4
}
define i64 @bs_and64i_multiuse(i64 %a, i64 %b) #0 {
; CHECK-LABEL: @bs_and64i_multiuse(
; CHECK-NEXT: [[T1:%.*]] = tail call i64 @llvm.bswap.i64(i64 [[A:%.*]])
; CHECK-NEXT: [[T2:%.*]] = and i64 [[T1]], 1000000001
; CHECK-NEXT: [[T3:%.*]] = mul i64 [[T2]], [[T1]]
; CHECK-NEXT: ret i64 [[T3]]
;
%t1 = tail call i64 @llvm.bswap.i64(i64 %a)
%t2 = and i64 %t1, 1000000001
%t3 = mul i64 %t2, %t1 ; to increase use count of the bswap
ret i64 %t3
}
declare i16 @llvm.bswap.i16(i16)
declare i32 @llvm.bswap.i32(i32)
declare i64 @llvm.bswap.i64(i64)
declare <2 x i16> @llvm.bswap.v2i16(<2 x i16>)
declare <2 x i32> @llvm.bswap.v2i32(<2 x i32>)
declare <2 x i64> @llvm.bswap.v2i64(<2 x i64>)
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