[flang] update PPC vector tests (NFC)

[kkwli]

Replace 'undef' with 'poison' based on commit f4e3b87

[llvmbot]

@llvm/pr-subscribers-flang-fir-hlfir

Author: Kelvin Li (kkwli)

Changes

Replace 'undef' with 'poison' based on commit f4e3b87

---

Patch is 36.35 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/126256.diff

4 Files Affected:

• (modified) flang/test/Lower/PowerPC/ppc-vec-load-elem-order.f90 (+4-4)
• (modified) flang/test/Lower/PowerPC/ppc-vec-load.f90 (+4-4)
• (modified) flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90 (+4-4)
• (modified) flang/test/Lower/PowerPC/ppc-vec-splat.f90 (+92-92)

diff --git a/flang/test/Lower/PowerPC/ppc-vec-load-elem-order.f90 b/flang/test/Lower/PowerPC/ppc-vec-load-elem-order.f90
index 214fe423628d6e5..355fd6c3a742ac0 100644
--- a/flang/test/Lower/PowerPC/ppc-vec-load-elem-order.f90
+++ b/flang/test/Lower/PowerPC/ppc-vec-load-elem-order.f90
@@ -719,8 +719,8 @@ subroutine vec_xlds_testi64a(arg1, arg2, res)
 ! LLVMIR: %[[arg1:.*]] = load i64, ptr %0, align 8
 ! LLVMIR: %[[addr:.*]] = getelementptr i8, ptr %1, i64 %[[arg1]]
 ! LLVMIR: %[[ld:.*]] = load i64, ptr %[[addr]], align 8
-! LLVMIR: %[[insrt:.*]] = insertelement <2 x i64> undef, i64 %[[ld]], i32 0
-! LLVMIR: %[[shflv:.*]] = shufflevector <2 x i64> %[[insrt]], <2 x i64> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[insrt:.*]] = insertelement <2 x i64> poison, i64 %[[ld]], i32 0
+! LLVMIR: %[[shflv:.*]] = shufflevector <2 x i64> %[[insrt]], <2 x i64> poison, <2 x i32> zeroinitializer
 ! LLVMIR: store <2 x i64> %[[shflv]], ptr %2, align 16
 end subroutine vec_xlds_testi64a
 
@@ -734,8 +734,8 @@ subroutine vec_xlds_testf64a(arg1, arg2, res)
 ! LLVMIR: %[[arg1:.*]] = load i64, ptr %0, align 8
 ! LLVMIR: %[[addr:.*]] = getelementptr i8, ptr %1, i64 %[[arg1]]
 ! LLVMIR: %[[ld:.*]] = load i64, ptr %[[addr]], align 8
-! LLVMIR: %[[insrt:.*]] = insertelement <2 x i64> undef, i64 %[[ld]], i32 0
-! LLVMIR: %[[shflv:.*]] = shufflevector <2 x i64> %[[insrt]], <2 x i64> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[insrt:.*]] = insertelement <2 x i64> poison, i64 %[[ld]], i32 0
+! LLVMIR: %[[shflv:.*]] = shufflevector <2 x i64> %[[insrt]], <2 x i64> poison, <2 x i32> zeroinitializer
 ! LLVMIR: %[[bc:.*]] = bitcast <2 x i64> %[[shflv]] to <2 x double>
 ! LLVMIR: store <2 x double> %[[bc]], ptr %2, align 16
 end subroutine vec_xlds_testf64a
diff --git a/flang/test/Lower/PowerPC/ppc-vec-load.f90 b/flang/test/Lower/PowerPC/ppc-vec-load.f90
index a81ed055ce08c85..f2c918ecf5bfef5 100644
--- a/flang/test/Lower/PowerPC/ppc-vec-load.f90
+++ b/flang/test/Lower/PowerPC/ppc-vec-load.f90
@@ -683,8 +683,8 @@ subroutine vec_xlds_testi64a(arg1, arg2, res)
 ! LLVMIR: %[[arg1:.*]] = load i64, ptr %0, align 8
 ! LLVMIR: %[[addr:.*]] = getelementptr i8, ptr %1, i64 %[[arg1]]
 ! LLVMIR: %[[ld:.*]] = load i64, ptr %[[addr]], align 8
-! LLVMIR: %[[insrt:.*]] = insertelement <2 x i64> undef, i64 %[[ld]], i32 0
-! LLVMIR: %[[shfl:.*]] = shufflevector <2 x i64> %[[insrt]], <2 x i64> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[insrt:.*]] = insertelement <2 x i64> poison, i64 %[[ld]], i32 0
+! LLVMIR: %[[shfl:.*]] = shufflevector <2 x i64> %[[insrt]], <2 x i64> poison, <2 x i32> zeroinitializer
 ! LLVMIR: store <2 x i64> %[[shfl]], ptr %2, align 16
 end subroutine vec_xlds_testi64a
 
@@ -698,8 +698,8 @@ subroutine vec_xlds_testf64a(arg1, arg2, res)
 ! LLVMIR: %[[arg1:.*]] = load i64, ptr %0, align 8
 ! LLVMIR: %[[addr:.*]] = getelementptr i8, ptr %1, i64 %[[arg1]]
 ! LLVMIR: %[[ld:.*]] = load i64, ptr %[[addr]], align 8
-! LLVMIR: %[[insrt:.*]] = insertelement <2 x i64> undef, i64 %[[ld]], i32 0
-! LLVMIR: %[[shfl:.*]] = shufflevector <2 x i64> %[[insrt]], <2 x i64> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[insrt:.*]] = insertelement <2 x i64> poison, i64 %[[ld]], i32 0
+! LLVMIR: %[[shfl:.*]] = shufflevector <2 x i64> %[[insrt]], <2 x i64> poison, <2 x i32> zeroinitializer
 ! LLVMIR: %[[bc:.*]] = bitcast <2 x i64> %[[shfl]] to <2 x double>
 ! LLVMIR: store <2 x double> %[[bc]], ptr %2, align 16
 end subroutine vec_xlds_testf64a
diff --git a/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90 b/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90
index d95e9828531cd0f..50604e1f720f3a9 100644
--- a/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90
+++ b/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90
@@ -8,8 +8,8 @@ subroutine vec_splat_testf32i64(x)
 
 ! LLVMIR: %[[x:.*]] = load <4 x float>, ptr %{{[0-9]}}, align 16
 ! LLVMIR: %[[ele:.*]] = extractelement <4 x float> %[[x]], i64 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x float> undef, float %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x float> poison, float %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x float> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testf32i64
 
@@ -20,7 +20,7 @@ subroutine vec_splat_testu8i16(x)
 
 ! LLVMIR: %[[x:.*]] = load <16 x i8>, ptr %{{[0-9]}}, align 16
 ! LLVMIR: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i16 15
-! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> undef, i8 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> undef, <16 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> poison, i8 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> poison, <16 x i32> zeroinitializer
 ! LLVMIR: store <16 x i8> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testu8i16
diff --git a/flang/test/Lower/PowerPC/ppc-vec-splat.f90 b/flang/test/Lower/PowerPC/ppc-vec-splat.f90
index 17558926afd5f26..f3c1f19d5877d2b 100644
--- a/flang/test/Lower/PowerPC/ppc-vec-splat.f90
+++ b/flang/test/Lower/PowerPC/ppc-vec-splat.f90
@@ -14,8 +14,8 @@ subroutine vec_splat_testi8i8(x)
 ! LLVMIR: %[[x:.*]] = load <16 x i8>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i8 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i8 15
-! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> undef, i8 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> undef, <16 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> poison, i8 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> poison, <16 x i32> zeroinitializer
 ! LLVMIR: store <16 x i8> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi8i8
 
@@ -27,8 +27,8 @@ subroutine vec_splat_testi8i16(x)
 ! LLVMIR: %[[x:.*]] = load <16 x i8>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i16 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i16 15
-! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> undef, i8 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> undef, <16 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> poison, i8 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> poison, <16 x i32> zeroinitializer
 ! LLVMIR: store <16 x i8> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi8i16
 
@@ -40,8 +40,8 @@ subroutine vec_splat_testi8i32(x)
 ! LLVMIR: %[[x:.*]] = load <16 x i8>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i32 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i32 15
-! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> undef, i8 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> undef, <16 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> poison, i8 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> poison, <16 x i32> zeroinitializer
 ! LLVMIR: store <16 x i8> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi8i32
 
@@ -53,8 +53,8 @@ subroutine vec_splat_testi8i64(x)
 ! LLVMIR: %[[x:.*]] = load <16 x i8>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i64 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i64 15
-! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> undef, i8 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> undef, <16 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <16 x i8> poison, i8 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <16 x i8> %[[ins]], <16 x i8> poison, <16 x i32> zeroinitializer
 ! LLVMIR: store <16 x i8> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi8i64
 
@@ -66,8 +66,8 @@ subroutine vec_splat_testi16i8(x)
 ! LLVMIR: %[[x:.*]] = load <8 x i16>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <8 x i16> %[[x]], i8 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <8 x i16> %[[x]], i8 7
-! LLVMIR: %[[ins:.*]] = insertelement <8 x i16> undef, i16 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <8 x i16> %[[ins]], <8 x i16> undef, <8 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <8 x i16> poison, i16 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <8 x i16> %[[ins]], <8 x i16> poison, <8 x i32> zeroinitializer
 ! LLVMIR: store <8 x i16> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi16i8
 
@@ -79,8 +79,8 @@ subroutine vec_splat_testi16i16(x)
 ! LLVMIR: %[[x:.*]] = load <8 x i16>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <8 x i16> %[[x]], i16 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <8 x i16> %[[x]], i16 7
-! LLVMIR: %[[ins:.*]] = insertelement <8 x i16> undef, i16 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <8 x i16> %[[ins]], <8 x i16> undef, <8 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <8 x i16> poison, i16 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <8 x i16> %[[ins]], <8 x i16> poison, <8 x i32> zeroinitializer
 ! LLVMIR: store <8 x i16> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi16i16
 
@@ -92,8 +92,8 @@ subroutine vec_splat_testi16i32(x)
 ! LLVMIR: %[[x:.*]] = load <8 x i16>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <8 x i16> %[[x]], i32 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <8 x i16> %[[x]], i32 7
-! LLVMIR: %[[ins:.*]] = insertelement <8 x i16> undef, i16 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <8 x i16> %[[ins]], <8 x i16> undef, <8 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <8 x i16> poison, i16 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <8 x i16> %[[ins]], <8 x i16> poison, <8 x i32> zeroinitializer
 ! LLVMIR: store <8 x i16> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi16i32
 
@@ -105,8 +105,8 @@ subroutine vec_splat_testi16i64(x)
 ! LLVMIR: %[[x:.*]] = load <8 x i16>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <8 x i16> %[[x]], i64 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <8 x i16> %[[x]], i64 7
-! LLVMIR: %[[ins:.*]] = insertelement <8 x i16> undef, i16 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <8 x i16> %[[ins]], <8 x i16> undef, <8 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <8 x i16> poison, i16 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <8 x i16> %[[ins]], <8 x i16> poison, <8 x i32> zeroinitializer
 ! LLVMIR: store <8 x i16> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi16i64
 
@@ -118,8 +118,8 @@ subroutine vec_splat_testi32i8(x)
 ! LLVMIR: %[[x:.*]] = load <4 x i32>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <4 x i32> %[[x]], i8 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <4 x i32> %[[x]], i8 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x i32> undef, i32 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x i32> %[[ins]], <4 x i32> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x i32> poison, i32 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x i32> %[[ins]], <4 x i32> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x i32> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi32i8
 
@@ -131,8 +131,8 @@ subroutine vec_splat_testi32i16(x)
 ! LLVMIR: %[[x:.*]] = load <4 x i32>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <4 x i32> %[[x]], i16 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <4 x i32> %[[x]], i16 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x i32> undef, i32 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x i32> %[[ins]], <4 x i32> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x i32> poison, i32 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x i32> %[[ins]], <4 x i32> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x i32> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi32i16
 
@@ -144,8 +144,8 @@ subroutine vec_splat_testi32i32(x)
 ! LLVMIR: %[[x:.*]] = load <4 x i32>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <4 x i32> %[[x]], i32 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <4 x i32> %[[x]], i32 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x i32> undef, i32 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x i32> %[[ins]], <4 x i32> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x i32> poison, i32 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x i32> %[[ins]], <4 x i32> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x i32> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi32i32
 
@@ -157,8 +157,8 @@ subroutine vec_splat_testi32i64(x)
 ! LLVMIR: %[[x:.*]] = load <4 x i32>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <4 x i32> %[[x]], i64 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <4 x i32> %[[x]], i64 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x i32> undef, i32 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x i32> %[[ins]], <4 x i32> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x i32> poison, i32 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x i32> %[[ins]], <4 x i32> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x i32> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi32i64
 
@@ -170,8 +170,8 @@ subroutine vec_splat_testi64i8(x)
 ! LLVMIR: %[[x:.*]] = load <2 x i64>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <2 x i64> %[[x]], i8 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <2 x i64> %[[x]], i8 1
-! LLVMIR: %[[ins:.*]] = insertelement <2 x i64> undef, i64 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <2 x i64> %[[ins]], <2 x i64> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <2 x i64> poison, i64 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <2 x i64> %[[ins]], <2 x i64> poison, <2 x i32> zeroinitializer
 ! LLVMIR: store <2 x i64> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi64i8
 
@@ -183,8 +183,8 @@ subroutine vec_splat_testi64i16(x)
 ! LLVMIR: %[[x:.*]] = load <2 x i64>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <2 x i64> %[[x]], i16 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <2 x i64> %[[x]], i16 1
-! LLVMIR: %[[ins:.*]] = insertelement <2 x i64> undef, i64 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <2 x i64> %[[ins]], <2 x i64> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <2 x i64> poison, i64 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <2 x i64> %[[ins]], <2 x i64> poison, <2 x i32> zeroinitializer
 ! LLVMIR: store <2 x i64> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi64i16
 
@@ -196,8 +196,8 @@ subroutine vec_splat_testi64i32(x)
 ! LLVMIR: %[[x:.*]] = load <2 x i64>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <2 x i64> %[[x]], i32 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <2 x i64> %[[x]], i32 1
-! LLVMIR: %[[ins:.*]] = insertelement <2 x i64> undef, i64 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <2 x i64> %[[ins]], <2 x i64> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <2 x i64> poison, i64 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <2 x i64> %[[ins]], <2 x i64> poison, <2 x i32> zeroinitializer
 ! LLVMIR: store <2 x i64> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi64i32
 
@@ -209,8 +209,8 @@ subroutine vec_splat_testi64i64(x)
 ! LLVMIR: %[[x:.*]] = load <2 x i64>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <2 x i64> %[[x]], i64 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <2 x i64> %[[x]], i64 1
-! LLVMIR: %[[ins:.*]] = insertelement <2 x i64> undef, i64 %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <2 x i64> %[[ins]], <2 x i64> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <2 x i64> poison, i64 %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <2 x i64> %[[ins]], <2 x i64> poison, <2 x i32> zeroinitializer
 ! LLVMIR: store <2 x i64> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testi64i64
 
@@ -222,8 +222,8 @@ subroutine vec_splat_testf32i8(x)
 ! LLVMIR: %[[x:.*]] = load <4 x float>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <4 x float> %[[x]], i8 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <4 x float> %[[x]], i8 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x float> undef, float %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x float> poison, float %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x float> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testf32i8
 
@@ -235,8 +235,8 @@ subroutine vec_splat_testf32i16(x)
 ! LLVMIR: %[[x:.*]] = load <4 x float>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <4 x float> %[[x]], i16 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <4 x float> %[[x]], i16 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x float> undef, float %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x float> poison, float %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x float> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testf32i16
 
@@ -248,8 +248,8 @@ subroutine vec_splat_testf32i32(x)
 ! LLVMIR: %[[x:.*]] = load <4 x float>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <4 x float> %[[x]], i32 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <4 x float> %[[x]], i32 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x float> undef, float %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x float> poison, float %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x float> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testf32i32
 
@@ -261,8 +261,8 @@ subroutine vec_splat_testf32i64(x)
 ! LLVMIR: %[[x:.*]] = load <4 x float>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <4 x float> %[[x]], i64 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <4 x float> %[[x]], i64 3
-! LLVMIR: %[[ins:.*]] = insertelement <4 x float> undef, float %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> undef, <4 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <4 x float> poison, float %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <4 x float> %[[ins]], <4 x float> poison, <4 x i32> zeroinitializer
 ! LLVMIR: store <4 x float> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testf32i64
 
@@ -274,8 +274,8 @@ subroutine vec_splat_testf64i8(x)
 ! LLVMIR: %[[x:.*]] = load <2 x double>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <2 x double> %[[x]], i8 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <2 x double> %[[x]], i8 1
-! LLVMIR: %[[ins:.*]] = insertelement <2 x double> undef, double %[[ele]], i32 0
-! LLVMIR: %[[y:.*]] = shufflevector <2 x double> %[[ins]], <2 x double> undef, <2 x i32> zeroinitializer
+! LLVMIR: %[[ins:.*]] = insertelement <2 x double> poison, double %[[ele]], i32 0
+! LLVMIR: %[[y:.*]] = shufflevector <2 x double> %[[ins]], <2 x double> poison, <2 x i32> zeroinitializer
 ! LLVMIR: store <2 x double> %[[y]], ptr %{{[0-9]}}, align 16
 end subroutine vec_splat_testf64i8
 
@@ -287,8 +287,8 @@ subroutine vec_splat_testf64i16(x)
 ! LLVMIR: %[[x:.*]] = load <2 x double>, ptr %{{[0-9]}}, align 16
 ! LLVMIR-LE: %[[ele:.*]] = extractelement <2 x double> %[[x]], i16 0
 ! LLVMIR-BE: %[[ele:.*]] = extractelement <2 x double> %[[x]], i16 1
-! LLVMIR: %[[ins:.*]...
[truncated]

[DanielCChen]

LGTM.