Replace undef with poison for placeholders.

Author: maarquitos14

llvm/test/CodeGen/SPIRV/extensions/SPV_KHR_float_controls2/exec_mode.ll

@@ -65,29 +65,29 @@ entry:
 !14 = !{i32 1, i32 0}
 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_HALF]] FPFastMathDefault %[[#HALF_TYPE:]] 1 
-!17 = !{ptr @k_float_controls_half, i32 6028, half undef, i32 1}
+!17 = !{ptr @k_float_controls_half, i32 6028, half poison, i32 1}
 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_BFLOAT]] FPFastMathDefault %[[#BFLOAT_TYPE:]] 2 
-!18 = !{ptr @k_float_controls_bfloat, i32 6028, bfloat undef, i32 2}
+!18 = !{ptr @k_float_controls_bfloat, i32 6028, bfloat poison, i32 2}
 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_FLOAT]] FPFastMathDefault %[[#FLOAT_TYPE:]] 4 
-!19 = !{ptr @k_float_controls_float, i32 6028, float undef, i32 4}
+!19 = !{ptr @k_float_controls_float, i32 6028, float poison, i32 4}
 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_DOUBLE]] FPFastMathDefault %[[#DOUBLE_TYPE:]] 7 
-!20 = !{ptr @k_float_controls_double, i32 6028, double undef, i32 7}
+!20 = !{ptr @k_float_controls_double, i32 6028, double poison, i32 7}
 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_FP128]] FPFastMathDefault %[[#FP128_TYPE:]] 65536
-!21 = !{ptr @k_float_controls_fp128, i32 6028, fp128 undef, i32 65536}
+!21 = !{ptr @k_float_controls_fp128, i32 6028, fp128 poison, i32 65536}
 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_ALL]] FPFastMathDefault %[[#HALF_TYPE]] 131072 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_ALL]] FPFastMathDefault %[[#FLOAT_TYPE]] 262144 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_ALL]] FPFastMathDefault %[[#DOUBLE_TYPE]] 458752 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_ALL]] FPFastMathDefault %[[#FP128_TYPE]] 65543 
-!22 = !{ptr @k_float_controls_all, i32 6028, half undef, i32 131072}
-!23 = !{ptr @k_float_controls_all, i32 6028, bfloat undef, i32 131072}
-!24 = !{ptr @k_float_controls_all, i32 6028, float undef, i32 262144}
-!25 = !{ptr @k_float_controls_all, i32 6028, double undef, i32 458752}
-!26 = !{ptr @k_float_controls_all, i32 6028, fp128 undef, i32 65543}
+!22 = !{ptr @k_float_controls_all, i32 6028, half poison, i32 131072}
+!23 = !{ptr @k_float_controls_all, i32 6028, bfloat poison, i32 131072}
+!24 = !{ptr @k_float_controls_all, i32 6028, float poison, i32 262144}
+!25 = !{ptr @k_float_controls_all, i32 6028, double poison, i32 458752}
+!26 = !{ptr @k_float_controls_all, i32 6028, fp128 poison, i32 65543}
 
 ; CHECK: %[[#HALF_TYPE]] = OpTypeFloat 16
 ; CHECK: %[[#FLOAT_TYPE]] = OpTypeFloat 32

llvm/test/CodeGen/SPIRV/extensions/SPV_KHR_float_controls2/exec_mode2.ll

@@ -34,14 +34,14 @@ entry:
 !14 = !{i32 1, i32 0}
 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_FLOAT]] FPFastMathDefault %[[#FLOAT_TYPE:]] 131079 
-!19 = !{ptr @k_float_controls_float, i32 6028, float undef, i32 131079}
+!19 = !{ptr @k_float_controls_float, i32 6028, float poison, i32 131079}
 ; We expect 130179 for float type.
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_ALL]] FPFastMathDefault %[[#FLOAT_TYPE:]] 131079 
 ; We expect 7 for the rest of types because it's NotInf | NotNaN | NSZ set by SignedZeroInfNanPreserve.
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_ALL]] FPFastMathDefault %[[#HALF_TYPE:]] 7 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_ALL]] FPFastMathDefault %[[#DOUBLE_TYPE:]] 7 
 ; CHECK-DAG: OpExecutionMode %[[#KERNEL_ALL]] FPFastMathDefault %[[#FP128_TYPE:]] 7 
-!20 = !{ptr @k_float_controls_all, i32 6028, float undef, i32 131079}
+!20 = !{ptr @k_float_controls_all, i32 6028, float poison, i32 131079}
 ; ContractionOff is now replaced with FPFastMathDefault with AllowContract bit set to false.
 !21 = !{ptr @k_float_controls_float, i32 31}
 !22 = !{ptr @k_float_controls_all, i32 31}