| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| define i32 @t0(i64 %x) { |
| ; CHECK-LABEL: @t0( |
| ; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63 |
| ; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32 |
| ; CHECK-NEXT: ret i32 [[T1_NEG]] |
| ; |
| %t0 = lshr i64 %x, 63 |
| %t1 = trunc i64 %t0 to i32 |
| %r = sub i32 0, %t1 |
| ret i32 %r |
| } |
| define i32 @t1_exact(i64 %x) { |
| ; CHECK-LABEL: @t1_exact( |
| ; CHECK-NEXT: [[T0_NEG:%.*]] = ashr exact i64 [[X:%.*]], 63 |
| ; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32 |
| ; CHECK-NEXT: ret i32 [[T1_NEG]] |
| ; |
| %t0 = lshr exact i64 %x, 63 |
| %t1 = trunc i64 %t0 to i32 |
| %r = sub i32 0, %t1 |
| ret i32 %r |
| } |
| define i32 @t2(i64 %x) { |
| ; CHECK-LABEL: @t2( |
| ; CHECK-NEXT: [[T0_NEG:%.*]] = lshr i64 [[X:%.*]], 63 |
| ; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32 |
| ; CHECK-NEXT: ret i32 [[T1_NEG]] |
| ; |
| %t0 = ashr i64 %x, 63 |
| %t1 = trunc i64 %t0 to i32 |
| %r = sub i32 0, %t1 |
| ret i32 %r |
| } |
| define i32 @t3_exact(i64 %x) { |
| ; CHECK-LABEL: @t3_exact( |
| ; CHECK-NEXT: [[T0_NEG:%.*]] = lshr exact i64 [[X:%.*]], 63 |
| ; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32 |
| ; CHECK-NEXT: ret i32 [[T1_NEG]] |
| ; |
| %t0 = ashr exact i64 %x, 63 |
| %t1 = trunc i64 %t0 to i32 |
| %r = sub i32 0, %t1 |
| ret i32 %r |
| } |
| |
| define <2 x i32> @t4(<2 x i64> %x) { |
| ; CHECK-LABEL: @t4( |
| ; CHECK-NEXT: [[T0_NEG:%.*]] = ashr <2 x i64> [[X:%.*]], <i64 63, i64 63> |
| ; CHECK-NEXT: [[T1_NEG:%.*]] = trunc <2 x i64> [[T0_NEG]] to <2 x i32> |
| ; CHECK-NEXT: ret <2 x i32> [[T1_NEG]] |
| ; |
| %t0 = lshr <2 x i64> %x, <i64 63, i64 63> |
| %t1 = trunc <2 x i64> %t0 to <2 x i32> |
| %r = sub <2 x i32> zeroinitializer, %t1 |
| ret <2 x i32> %r |
| } |
| |
| define <2 x i32> @t5(<2 x i64> %x) { |
| ; CHECK-LABEL: @t5( |
| ; CHECK-NEXT: [[T0:%.*]] = lshr <2 x i64> [[X:%.*]], <i64 63, i64 undef> |
| ; CHECK-NEXT: [[T1:%.*]] = trunc <2 x i64> [[T0]] to <2 x i32> |
| ; CHECK-NEXT: [[R:%.*]] = sub <2 x i32> <i32 0, i32 undef>, [[T1]] |
| ; CHECK-NEXT: ret <2 x i32> [[R]] |
| ; |
| %t0 = lshr <2 x i64> %x, <i64 63, i64 undef> |
| %t1 = trunc <2 x i64> %t0 to <2 x i32> |
| %r = sub <2 x i32> <i32 0, i32 undef>, %t1 |
| ret <2 x i32> %r |
| } |
| |
| declare void @use64(i64) |
| declare void @use32(i32) |
| |
| define i32 @t6(i64 %x) { |
| ; CHECK-LABEL: @t6( |
| ; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63 |
| ; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X]], 63 |
| ; CHECK-NEXT: call void @use64(i64 [[T0]]) |
| ; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32 |
| ; CHECK-NEXT: ret i32 [[T1_NEG]] |
| ; |
| %t0 = lshr i64 %x, 63 |
| call void @use64(i64 %t0) |
| %t1 = trunc i64 %t0 to i32 |
| %r = sub i32 0, %t1 |
| ret i32 %r |
| } |
| |
| define i32 @n7(i64 %x) { |
| ; CHECK-LABEL: @n7( |
| ; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X:%.*]], 63 |
| ; CHECK-NEXT: [[T1:%.*]] = trunc i64 [[T0]] to i32 |
| ; CHECK-NEXT: call void @use32(i32 [[T1]]) |
| ; CHECK-NEXT: [[R:%.*]] = sub nsw i32 0, [[T1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = lshr i64 %x, 63 |
| %t1 = trunc i64 %t0 to i32 |
| call void @use32(i32 %t1) |
| %r = sub i32 0, %t1 |
| ret i32 %r |
| } |
| |
| define i32 @n8(i64 %x) { |
| ; CHECK-LABEL: @n8( |
| ; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X:%.*]], 63 |
| ; CHECK-NEXT: call void @use64(i64 [[T0]]) |
| ; CHECK-NEXT: [[T1:%.*]] = trunc i64 [[T0]] to i32 |
| ; CHECK-NEXT: call void @use32(i32 [[T1]]) |
| ; CHECK-NEXT: [[R:%.*]] = sub nsw i32 0, [[T1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = lshr i64 %x, 63 |
| call void @use64(i64 %t0) |
| %t1 = trunc i64 %t0 to i32 |
| call void @use32(i32 %t1) |
| %r = sub i32 0, %t1 |
| ret i32 %r |
| } |
| |
| define i32 @n9(i64 %x) { |
| ; CHECK-LABEL: @n9( |
| ; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X:%.*]], 62 |
| ; CHECK-NEXT: [[T1:%.*]] = trunc i64 [[T0]] to i32 |
| ; CHECK-NEXT: [[R:%.*]] = sub nsw i32 0, [[T1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = lshr i64 %x, 62 |
| %t1 = trunc i64 %t0 to i32 |
| %r = sub i32 0, %t1 |
| ret i32 %r |
| } |
| |
| define i32 @n10(i64 %x) { |
| ; CHECK-LABEL: @n10( |
| ; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63 |
| ; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32 |
| ; CHECK-NEXT: [[R:%.*]] = add i32 [[T1_NEG]], 1 |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %t0 = lshr i64 %x, 63 |
| %t1 = trunc i64 %t0 to i32 |
| %r = sub i32 1, %t1 |
| ret i32 %r |
| } |