1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 2; RUN: opt -passes=instcombine -S < %s | FileCheck %s 3 4define void @test_undef(ptr %in_ptr, ptr %out_ptr) { 5; CHECK-LABEL: define void @test_undef( 6; CHECK-SAME: ptr [[IN_PTR:%.*]], ptr [[OUT_PTR:%.*]]) { 7; CHECK-NEXT: [[A:%.*]] = load <4 x float>, ptr [[IN_PTR]], align 16 8; CHECK-NEXT: [[D:%.*]] = shufflevector <4 x float> [[A]], <4 x float> poison, <4 x i32> zeroinitializer 9; CHECK-NEXT: store <4 x float> [[D]], ptr [[OUT_PTR]], align 16 10; CHECK-NEXT: ret void 11; 12 %A = load <4 x float>, ptr %in_ptr, align 16 13 %B = shufflevector <4 x float> %A, <4 x float> undef, <4 x i32> <i32 0, i32 0, i32 undef, i32 undef> 14 %C = shufflevector <4 x float> %B, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 4, i32 undef> 15 %D = shufflevector <4 x float> %C, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 2, i32 4> 16 store <4 x float> %D, ptr %out_ptr 17 ret void 18} 19 20define void @test_poison(ptr %in_ptr, ptr %out_ptr) { 21; CHECK-LABEL: define void @test_poison( 22; CHECK-SAME: ptr [[IN_PTR:%.*]], ptr [[OUT_PTR:%.*]]) { 23; CHECK-NEXT: [[A:%.*]] = load <4 x float>, ptr [[IN_PTR]], align 16 24; CHECK-NEXT: [[D:%.*]] = shufflevector <4 x float> [[A]], <4 x float> poison, <4 x i32> zeroinitializer 25; CHECK-NEXT: store <4 x float> [[D]], ptr [[OUT_PTR]], align 16 26; CHECK-NEXT: ret void 27; 28 %A = load <4 x float>, ptr %in_ptr, align 16 29 %B = shufflevector <4 x float> %A, <4 x float> poison, <4 x i32> <i32 0, i32 0, i32 undef, i32 undef> 30 %C = shufflevector <4 x float> %B, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 4, i32 undef> 31 %D = shufflevector <4 x float> %C, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 2, i32 4> 32 store <4 x float> %D, ptr %out_ptr 33 ret void 34} 35