forked from OSchip/llvm-project
233 lines
6.4 KiB
LLVM
233 lines
6.4 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
|
|
|
|
define i32 @test1(i32 %i) {
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK-NEXT: [[TMP12:%.*]] = call i32 @llvm.bswap.i32(i32 %i)
|
|
; CHECK-NEXT: ret i32 [[TMP12]]
|
|
;
|
|
%tmp1 = lshr i32 %i, 24
|
|
%tmp3 = lshr i32 %i, 8
|
|
%tmp4 = and i32 %tmp3, 65280
|
|
%tmp5 = or i32 %tmp1, %tmp4
|
|
%tmp7 = shl i32 %i, 8
|
|
%tmp8 = and i32 %tmp7, 16711680
|
|
%tmp9 = or i32 %tmp5, %tmp8
|
|
%tmp11 = shl i32 %i, 24
|
|
%tmp12 = or i32 %tmp9, %tmp11
|
|
ret i32 %tmp12
|
|
}
|
|
|
|
define i32 @test2(i32 %arg) {
|
|
; CHECK-LABEL: @test2(
|
|
; CHECK-NEXT: [[TMP14:%.*]] = call i32 @llvm.bswap.i32(i32 %arg)
|
|
; CHECK-NEXT: ret i32 [[TMP14]]
|
|
;
|
|
%tmp2 = shl i32 %arg, 24
|
|
%tmp4 = shl i32 %arg, 8
|
|
%tmp5 = and i32 %tmp4, 16711680
|
|
%tmp6 = or i32 %tmp2, %tmp5
|
|
%tmp8 = lshr i32 %arg, 8
|
|
%tmp9 = and i32 %tmp8, 65280
|
|
%tmp10 = or i32 %tmp6, %tmp9
|
|
%tmp12 = lshr i32 %arg, 24
|
|
%tmp14 = or i32 %tmp10, %tmp12
|
|
ret i32 %tmp14
|
|
}
|
|
|
|
define i16 @test3(i16 %s) {
|
|
; CHECK-LABEL: @test3(
|
|
; CHECK-NEXT: [[TMP5:%.*]] = call i16 @llvm.bswap.i16(i16 %s)
|
|
; CHECK-NEXT: ret i16 [[TMP5]]
|
|
;
|
|
%tmp2 = lshr i16 %s, 8
|
|
%tmp4 = shl i16 %s, 8
|
|
%tmp5 = or i16 %tmp2, %tmp4
|
|
ret i16 %tmp5
|
|
}
|
|
|
|
define i16 @test4(i16 %s) {
|
|
; CHECK-LABEL: @test4(
|
|
; CHECK-NEXT: [[TMP5:%.*]] = call i16 @llvm.bswap.i16(i16 %s)
|
|
; CHECK-NEXT: ret i16 [[TMP5]]
|
|
;
|
|
%tmp2 = lshr i16 %s, 8
|
|
%tmp4 = shl i16 %s, 8
|
|
%tmp5 = or i16 %tmp4, %tmp2
|
|
ret i16 %tmp5
|
|
}
|
|
|
|
define i16 @test5(i16 %a) {
|
|
; CHECK-LABEL: @test5(
|
|
; CHECK-NEXT: [[TMP_UPGRD_3:%.*]] = call i16 @llvm.bswap.i16(i16 %a)
|
|
; CHECK-NEXT: ret i16 [[TMP_UPGRD_3]]
|
|
;
|
|
%tmp = zext i16 %a to i32
|
|
%tmp1 = and i32 %tmp, 65280
|
|
%tmp2 = ashr i32 %tmp1, 8
|
|
%tmp2.upgrd.1 = trunc i32 %tmp2 to i16
|
|
%tmp4 = and i32 %tmp, 255
|
|
%tmp5 = shl i32 %tmp4, 8
|
|
%tmp5.upgrd.2 = trunc i32 %tmp5 to i16
|
|
%tmp.upgrd.3 = or i16 %tmp2.upgrd.1, %tmp5.upgrd.2
|
|
%tmp6 = bitcast i16 %tmp.upgrd.3 to i16
|
|
%tmp6.upgrd.4 = zext i16 %tmp6 to i32
|
|
%retval = trunc i32 %tmp6.upgrd.4 to i16
|
|
ret i16 %retval
|
|
}
|
|
|
|
; PR2842
|
|
define i32 @test6(i32 %x) nounwind readnone {
|
|
; CHECK-LABEL: @test6(
|
|
; CHECK-NEXT: [[TMP7:%.*]] = call i32 @llvm.bswap.i32(i32 %x)
|
|
; CHECK-NEXT: ret i32 [[TMP7]]
|
|
;
|
|
%tmp = shl i32 %x, 16
|
|
%x.mask = and i32 %x, 65280
|
|
%tmp1 = lshr i32 %x, 16
|
|
%tmp2 = and i32 %tmp1, 255
|
|
%tmp3 = or i32 %x.mask, %tmp
|
|
%tmp4 = or i32 %tmp3, %tmp2
|
|
%tmp5 = shl i32 %tmp4, 8
|
|
%tmp6 = lshr i32 %x, 24
|
|
%tmp7 = or i32 %tmp5, %tmp6
|
|
ret i32 %tmp7
|
|
}
|
|
|
|
declare void @extra_use(i32)
|
|
|
|
; swaphalf = (x << 16 | x >> 16)
|
|
; ((swaphalf & 0x00ff00ff) << 8) | ((swaphalf >> 8) & 0x00ff00ff)
|
|
|
|
define i32 @bswap32_and_first(i32 %x) {
|
|
; CHECK-LABEL: @bswap32_and_first(
|
|
; CHECK-NEXT: [[BSWAP:%.*]] = call i32 @llvm.bswap.i32(i32 %x)
|
|
; CHECK-NEXT: ret i32 [[BSWAP]]
|
|
;
|
|
%shl = shl i32 %x, 16
|
|
%shr = lshr i32 %x, 16
|
|
%swaphalf = or i32 %shl, %shr
|
|
%t = and i32 %swaphalf, 16711935
|
|
%tshl = shl nuw i32 %t, 8
|
|
%b = lshr i32 %swaphalf, 8
|
|
%band = and i32 %b, 16711935
|
|
%bswap = or i32 %tshl, %band
|
|
ret i32 %bswap
|
|
}
|
|
|
|
; Extra use should not prevent matching to bswap.
|
|
; swaphalf = (x << 16 | x >> 16)
|
|
; ((swaphalf & 0x00ff00ff) << 8) | ((swaphalf >> 8) & 0x00ff00ff)
|
|
|
|
define i32 @bswap32_and_first_extra_use(i32 %x) {
|
|
; CHECK-LABEL: @bswap32_and_first_extra_use(
|
|
; CHECK-NEXT: [[SHL:%.*]] = shl i32 %x, 16
|
|
; CHECK-NEXT: [[SHR:%.*]] = lshr i32 %x, 16
|
|
; CHECK-NEXT: [[SWAPHALF:%.*]] = or i32 [[SHL]], [[SHR]]
|
|
; CHECK-NEXT: [[T:%.*]] = and i32 [[SWAPHALF]], 16711935
|
|
; CHECK-NEXT: [[BSWAP:%.*]] = call i32 @llvm.bswap.i32(i32 %x)
|
|
; CHECK-NEXT: call void @extra_use(i32 [[T]])
|
|
; CHECK-NEXT: ret i32 [[BSWAP]]
|
|
;
|
|
%shl = shl i32 %x, 16
|
|
%shr = lshr i32 %x, 16
|
|
%swaphalf = or i32 %shl, %shr
|
|
%t = and i32 %swaphalf, 16711935
|
|
%tshl = shl nuw i32 %t, 8
|
|
%b = lshr i32 %swaphalf, 8
|
|
%band = and i32 %b, 16711935
|
|
%bswap = or i32 %tshl, %band
|
|
call void @extra_use(i32 %t)
|
|
ret i32 %bswap
|
|
}
|
|
|
|
; swaphalf = (x << 16 | x >> 16)
|
|
; ((swaphalf << 8) & 0xff00ff00) | ((swaphalf >> 8) & 0x00ff00ff)
|
|
|
|
; PR23863
|
|
define i32 @bswap32_shl_first(i32 %x) {
|
|
; CHECK-LABEL: @bswap32_shl_first(
|
|
; CHECK-NEXT: [[BSWAP:%.*]] = call i32 @llvm.bswap.i32(i32 %x)
|
|
; CHECK-NEXT: ret i32 [[BSWAP]]
|
|
;
|
|
%shl = shl i32 %x, 16
|
|
%shr = lshr i32 %x, 16
|
|
%swaphalf = or i32 %shl, %shr
|
|
%t = shl i32 %swaphalf, 8
|
|
%tand = and i32 %t, -16711936
|
|
%b = lshr i32 %swaphalf, 8
|
|
%band = and i32 %b, 16711935
|
|
%bswap = or i32 %tand, %band
|
|
ret i32 %bswap
|
|
}
|
|
|
|
; Extra use should not prevent matching to bswap.
|
|
; swaphalf = (x << 16 | x >> 16)
|
|
; ((swaphalf << 8) & 0xff00ff00) | ((swaphalf >> 8) & 0x00ff00ff)
|
|
|
|
define i32 @bswap32_shl_first_extra_use(i32 %x) {
|
|
; CHECK-LABEL: @bswap32_shl_first_extra_use(
|
|
; CHECK-NEXT: [[SHL:%.*]] = shl i32 %x, 16
|
|
; CHECK-NEXT: [[SHR:%.*]] = lshr i32 %x, 16
|
|
; CHECK-NEXT: [[SWAPHALF:%.*]] = or i32 [[SHL]], [[SHR]]
|
|
; CHECK-NEXT: [[T:%.*]] = shl i32 [[SWAPHALF]], 8
|
|
; CHECK-NEXT: [[BSWAP:%.*]] = call i32 @llvm.bswap.i32(i32 %x)
|
|
; CHECK-NEXT: call void @extra_use(i32 [[T]])
|
|
; CHECK-NEXT: ret i32 [[BSWAP]]
|
|
;
|
|
%shl = shl i32 %x, 16
|
|
%shr = lshr i32 %x, 16
|
|
%swaphalf = or i32 %shl, %shr
|
|
%t = shl i32 %swaphalf, 8
|
|
%tand = and i32 %t, -16711936
|
|
%b = lshr i32 %swaphalf, 8
|
|
%band = and i32 %b, 16711935
|
|
%bswap = or i32 %tand, %band
|
|
call void @extra_use(i32 %t)
|
|
ret i32 %bswap
|
|
}
|
|
|
|
define i16 @test8(i16 %a) {
|
|
; CHECK-LABEL: @test8(
|
|
; CHECK-NEXT: [[REV:%.*]] = call i16 @llvm.bswap.i16(i16 %a)
|
|
; CHECK-NEXT: ret i16 [[REV]]
|
|
;
|
|
%conv = zext i16 %a to i32
|
|
%shr = lshr i16 %a, 8
|
|
%shl = shl i32 %conv, 8
|
|
%conv1 = zext i16 %shr to i32
|
|
%or = or i32 %conv1, %shl
|
|
%conv2 = trunc i32 %or to i16
|
|
ret i16 %conv2
|
|
}
|
|
|
|
define i16 @test9(i16 %a) {
|
|
; CHECK-LABEL: @test9(
|
|
; CHECK-NEXT: [[REV:%.*]] = call i16 @llvm.bswap.i16(i16 %a)
|
|
; CHECK-NEXT: ret i16 [[REV]]
|
|
;
|
|
%conv = zext i16 %a to i32
|
|
%shr = lshr i32 %conv, 8
|
|
%shl = shl i32 %conv, 8
|
|
%or = or i32 %shr, %shl
|
|
%conv2 = trunc i32 %or to i16
|
|
ret i16 %conv2
|
|
}
|
|
|
|
define i16 @test10(i32 %a) {
|
|
; CHECK-LABEL: @test10(
|
|
; CHECK-NEXT: [[TRUNC:%.*]] = trunc i32 %a to i16
|
|
; CHECK-NEXT: [[REV:%.*]] = call i16 @llvm.bswap.i16(i16 [[TRUNC]])
|
|
; CHECK-NEXT: ret i16 [[REV]]
|
|
;
|
|
%shr1 = lshr i32 %a, 8
|
|
%and1 = and i32 %shr1, 255
|
|
%and2 = shl i32 %a, 8
|
|
%shl1 = and i32 %and2, 65280
|
|
%or = or i32 %and1, %shl1
|
|
%conv = trunc i32 %or to i16
|
|
ret i16 %conv
|
|
}
|
|
|