| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| ; shift left |
| |
| define i32 @and_signbit_select_shl(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @and_signbit_select_shl( |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], -16777216 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = and i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = shl i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @and_nosignbit_select_shl(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @and_nosignbit_select_shl( |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], -16777216 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = and i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = shl i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @or_signbit_select_shl(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @or_signbit_select_shl( |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], -16777216 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = or i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = shl i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @or_nosignbit_select_shl(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @or_nosignbit_select_shl( |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], -16777216 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = or i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = shl i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @xor_signbit_select_shl(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @xor_signbit_select_shl( |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], -16777216 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = xor i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = shl i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @xor_nosignbit_select_shl(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @xor_nosignbit_select_shl( |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], -16777216 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = xor i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = shl i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @add_signbit_select_shl(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @add_signbit_select_shl( |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[TMP1]], -16777216 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = add i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = shl i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @add_nosignbit_select_shl(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @add_nosignbit_select_shl( |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[TMP1]], -16777216 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = add i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = shl i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| ; logical shift right |
| |
| define i32 @and_signbit_select_lshr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @and_signbit_select_lshr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 16776960 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = and i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = lshr i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @and_nosignbit_select_lshr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @and_nosignbit_select_lshr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 8388352 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = and i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = lshr i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @or_signbit_select_lshr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @or_signbit_select_lshr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 16776960 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = or i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = lshr i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @or_nosignbit_select_lshr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @or_nosignbit_select_lshr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 8388352 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = or i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = lshr i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @xor_signbit_select_lshr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @xor_signbit_select_lshr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 16776960 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = xor i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = lshr i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @xor_nosignbit_select_lshr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @xor_nosignbit_select_lshr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 8388352 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = xor i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = lshr i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @add_signbit_select_lshr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @add_signbit_select_lshr( |
| ; CHECK-NEXT: [[T0:%.*]] = add i32 [[X:%.*]], -65536 |
| ; CHECK-NEXT: [[T1:%.*]] = select i1 [[COND:%.*]], i32 [[T0]], i32 [[X]] |
| ; CHECK-NEXT: [[R:%.*]] = lshr i32 [[T1]], 8 |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = add i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = lshr i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @add_nosignbit_select_lshr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @add_nosignbit_select_lshr( |
| ; CHECK-NEXT: [[T0:%.*]] = add i32 [[X:%.*]], 2147418112 |
| ; CHECK-NEXT: [[T1:%.*]] = select i1 [[COND:%.*]], i32 [[T0]], i32 [[X]] |
| ; CHECK-NEXT: [[R:%.*]] = lshr i32 [[T1]], 8 |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = add i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = lshr i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| ; arithmetic shift right |
| |
| define i32 @and_signbit_select_ashr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @and_signbit_select_ashr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], -256 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = and i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = ashr i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @and_nosignbit_select_ashr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @and_nosignbit_select_ashr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 8388352 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = and i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = ashr i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @or_signbit_select_ashr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @or_signbit_select_ashr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], -256 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = or i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = ashr i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @or_nosignbit_select_ashr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @or_nosignbit_select_ashr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = or i32 [[TMP1]], 8388352 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = or i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = ashr i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @xor_signbit_select_ashr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @xor_signbit_select_ashr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], -256 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = xor i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = ashr i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @xor_nosignbit_select_ashr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @xor_nosignbit_select_ashr( |
| ; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 8388352 |
| ; CHECK-NEXT: [[R:%.*]] = select i1 [[COND:%.*]], i32 [[TMP2]], i32 [[TMP1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = xor i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = ashr i32 %t1, 8 |
| ret i32 %r |
| } |
| |
| define i32 @add_signbit_select_ashr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @add_signbit_select_ashr( |
| ; CHECK-NEXT: [[T0:%.*]] = add i32 [[X:%.*]], -65536 |
| ; CHECK-NEXT: [[T1:%.*]] = select i1 [[COND:%.*]], i32 [[T0]], i32 [[X]] |
| ; CHECK-NEXT: [[R:%.*]] = ashr i32 [[T1]], 8 |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = add i32 %x, 4294901760 ; 0xFFFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = ashr i32 %t1, 8 |
| ret i32 %r |
| } |
| define i32 @add_nosignbit_select_ashr(i32 %x, i1 %cond) { |
| ; CHECK-LABEL: @add_nosignbit_select_ashr( |
| ; CHECK-NEXT: [[T0:%.*]] = add i32 [[X:%.*]], 2147418112 |
| ; CHECK-NEXT: [[T1:%.*]] = select i1 [[COND:%.*]], i32 [[T0]], i32 [[X]] |
| ; CHECK-NEXT: [[R:%.*]] = ashr i32 [[T1]], 8 |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = add i32 %x, 2147418112 ; 0x7FFF0000 |
| %t1 = select i1 %cond, i32 %t0, i32 %x |
| %r = ashr i32 %t1, 8 |
| ret i32 %r |
| } |