; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py ; RUN: llc < %s -mtriple=x86_64-- -mattr=avx512bw | FileCheck %s ; This would infinite loop by trying to truncate to i16 and then promote back to i32. define i16 @PR40793(<8 x i16> %t1) { ; CHECK-LABEL: PR40793: ; CHECK: # %bb.0: ; CHECK-NEXT: vpextrw $5, %xmm0, %ecx ; CHECK-NEXT: andb $15, %cl ; CHECK-NEXT: movl $32733, %eax # imm = 0x7FDD ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx ; CHECK-NEXT: shrl %cl, %eax ; CHECK-NEXT: # kill: def $ax killed $ax killed $eax ; CHECK-NEXT: retq %t2 = and <8 x i16> %t1, %t3 = lshr <8 x i16> , %t2 %t4 = bitcast <8 x i16> %t3 to <2 x double> %t5 = call <2 x double> @llvm.fabs.v2f64(<2 x double> %t4) %t6 = bitcast <2 x double> %t5 to <8 x i16> %t7 = extractelement <8 x i16> %t6, i64 5 ret i16 %t7 } declare <2 x double> @llvm.fabs.v2f64(<2 x double>) ; This would infinite loop by trying to truncate and any_extend. %struct.anon = type { [9 x i8], [3 x i8] } @b = common dso_local local_unnamed_addr global %struct.anon zeroinitializer, align 4 define dso_local i32 @d() { ; CHECK-LABEL: d: ; CHECK: # %bb.0: ; CHECK-NEXT: movzbl b+{{.*}}(%rip), %ecx ; CHECK-NEXT: andl $7, %ecx ; CHECK-NEXT: movl $d, %eax ; CHECK-NEXT: addl %ecx, %eax ; CHECK-NEXT: # kill: def $eax killed $eax killed $rax ; CHECK-NEXT: retq %bf.load = load i72, i72* bitcast (%struct.anon* @b to i72*), align 4 %bf.lshr = lshr i72 %bf.load, 64 %t0 = trunc i72 %bf.lshr to i64 %bf.cast = and i64 %t0, 7 %add.ptr = getelementptr i8, i8* bitcast (i32 ()* @d to i8*), i64 %bf.cast %t1 = ptrtoint i8* %add.ptr to i64 %t2 = trunc i64 %t1 to i32 ret i32 %t2 }