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