1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=instcombine -S | FileCheck %s 3 4target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5target triple = "x86_64-unknown-linux-gnu" 6 7; A copy of assume.ll, with undef at insertelement/shufflevector replaced with 8; poison. 9declare void @llvm.assume(i1) #1 10 11; This would crash. 12; Does it ever make sense to peek through a bitcast of the icmp operand? 13 14define i32 @PR40940(<4 x i8> %x) { 15; CHECK-LABEL: @PR40940( 16; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i8> [[X:%.*]], <4 x i8> poison, <4 x i32> <i32 1, i32 1, i32 2, i32 3> 17; CHECK-NEXT: [[T2:%.*]] = bitcast <4 x i8> [[SHUF]] to i32 18; CHECK-NEXT: [[T3:%.*]] = icmp ult i32 [[T2]], 65536 19; CHECK-NEXT: call void @llvm.assume(i1 [[T3]]) 20; CHECK-NEXT: ret i32 [[T2]] 21; 22 %shuf = shufflevector <4 x i8> %x, <4 x i8> poison, <4 x i32> <i32 1, i32 1, i32 2, i32 3> 23 %t2 = bitcast <4 x i8> %shuf to i32 24 %t3 = icmp ult i32 %t2, 65536 25 call void @llvm.assume(i1 %t3) 26 ret i32 %t2 27} 28