| ; RUN: opt -S -passes=instcombine < %s | FileCheck %s |
| |
| ; rdar://12182093 |
| |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.8.0" |
| |
| ; CHECK-LABEL: @udiv400( |
| ; CHECK: udiv i32 %x, 400 |
| ; CHECK: ret |
| define i32 @udiv400(i32 %x) { |
| entry: |
| %div = lshr i32 %x, 2 |
| %div1 = udiv i32 %div, 100 |
| ret i32 %div1 |
| } |
| |
| |
| ; CHECK-LABEL: @udiv400_no( |
| ; CHECK: ashr |
| ; CHECK: div |
| ; CHECK: ret |
| define i32 @udiv400_no(i32 %x) { |
| entry: |
| %div = ashr i32 %x, 2 |
| %div1 = udiv i32 %div, 100 |
| ret i32 %div1 |
| } |
| |
| ; CHECK-LABEL: @sdiv400_yes( |
| ; CHECK: udiv i32 %x, 400 |
| ; CHECK: ret |
| define i32 @sdiv400_yes(i32 %x) { |
| entry: |
| %div = lshr i32 %x, 2 |
| ; The sign bits of both operands are zero (i.e. we can prove they are |
| ; unsigned inputs), turn this into a udiv. |
| ; Next, optimize this just like sdiv. |
| %div1 = sdiv i32 %div, 100 |
| ret i32 %div1 |
| } |
| |
| |
| ; CHECK-LABEL: @udiv_i80( |
| ; CHECK: udiv i80 %x, 400 |
| ; CHECK: ret |
| define i80 @udiv_i80(i80 %x) { |
| %div = lshr i80 %x, 2 |
| %div1 = udiv i80 %div, 100 |
| ret i80 %div1 |
| } |
| |
| define i32 @no_crash_notconst_udiv(i32 %x, i32 %notconst) { |
| %div = lshr i32 %x, %notconst |
| %div1 = udiv i32 %div, 100 |
| ret i32 %div1 |
| } |