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1; RUN: opt -S -passes=instcombine < %s | FileCheck %s2 3; rdar://121820934 5target 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"6target triple = "x86_64-apple-macosx10.8.0"7 8; CHECK-LABEL: @udiv400(9; CHECK: udiv i32 %x, 40010; CHECK: ret11define i32 @udiv400(i32 %x) {12entry:13 %div = lshr i32 %x, 214 %div1 = udiv i32 %div, 10015 ret i32 %div116}17 18 19; CHECK-LABEL: @udiv400_no(20; CHECK: ashr21; CHECK: div22; CHECK: ret23define i32 @udiv400_no(i32 %x) {24entry:25 %div = ashr i32 %x, 226 %div1 = udiv i32 %div, 10027 ret i32 %div128}29 30; CHECK-LABEL: @sdiv400_yes(31; CHECK: udiv i32 %x, 40032; CHECK: ret33define i32 @sdiv400_yes(i32 %x) {34entry:35 %div = lshr i32 %x, 236 ; The sign bits of both operands are zero (i.e. we can prove they are37 ; unsigned inputs), turn this into a udiv.38 ; Next, optimize this just like sdiv.39 %div1 = sdiv i32 %div, 10040 ret i32 %div141}42 43 44; CHECK-LABEL: @udiv_i80(45; CHECK: udiv i80 %x, 40046; CHECK: ret47define i80 @udiv_i80(i80 %x) {48 %div = lshr i80 %x, 249 %div1 = udiv i80 %div, 10050 ret i80 %div151}52 53define i32 @no_crash_notconst_udiv(i32 %x, i32 %notconst) {54 %div = lshr i32 %x, %notconst55 %div1 = udiv i32 %div, 10056 ret i32 %div157}58