diff --git a/source/name_mapper.cpp b/source/name_mapper.cpp
index df632e1..43412a3 100644
--- a/source/name_mapper.cpp
+++ b/source/name_mapper.cpp
@@ -25,6 +25,8 @@
 #include "spirv-tools/libspirv.h"
 #include "spirv/1.1/spirv.h"
 
+#include "parsed_operand.h"
+
 namespace {
 
 // Converts a uint32_t to its string decimal representation.
@@ -287,6 +289,16 @@
       // are a struct and then give the raw Id number.
       SaveName(result_id, std::string("_struct_") + to_string(result_id));
       break;
+    case SpvOpConstant: {
+      std::ostringstream value;
+      EmitNumericLiteral(&value, inst, inst.operands[2]);
+      auto value_str = value.str();
+      // Use 'n' to signify negative. Other invalid characters will be mapped
+      // to underscore.
+      for (auto& c : value_str)
+        if (c == '-') c = 'n';
+      SaveName(result_id, NameForId(inst.type_id) + "_" + value_str);
+    } break;
     default:
       // If this instruction otherwise defines an Id, then save a mapping for
       // it.  This is needed to ensure uniqueness in there is an OpName with
diff --git a/source/name_mapper.h b/source/name_mapper.h
index 89eb93e..12078b6 100644
--- a/source/name_mapper.h
+++ b/source/name_mapper.h
@@ -57,6 +57,7 @@
 //  - A struct type maps to "_struct_" followed by the raw Id number.  That's
 //    pretty simplistic, but workable.
 //  - A built-in variable maps to its GLSL variable name.
+//  - Numeric literals in OpConstant map to a human-friendly name.
 class FriendlyNameMapper {
  public:
   // Construct a friendly name mapper, and determine friendly names for each
diff --git a/test/binary_to_text_test.cpp b/test/binary_to_text_test.cpp
index 9b97b3d..09d1abd 100644
--- a/test/binary_to_text_test.cpp
+++ b/test/binary_to_text_test.cpp
@@ -435,7 +435,7 @@
 OpMemoryModel Logical GLSL450
 %uint = OpTypeInt 32 0
 %_struct_2 = OpTypeStruct %uint %3 %4 %5 %6 %7 %8 %9 %10
-%11 = OpConstant %uint 42
+%uint_42 = OpConstant %uint 42
 )";
   EXPECT_THAT(EncodeAndDecodeSuccessfully(
                   input, SPV_BINARY_TO_TEXT_OPTION_FRIENDLY_NAMES),
diff --git a/test/name_mapper_test.cpp b/test/name_mapper_test.cpp
index 6c7755b..c201198 100644
--- a/test/name_mapper_test.cpp
+++ b/test/name_mapper_test.cpp
@@ -282,4 +282,57 @@
                              "%1 = OpVariable %2 Input",
                              1, "foo"}}), );
 
+INSTANTIATE_TEST_CASE_P(
+    SimpleIntegralConstants, FriendlyNameTest,
+    ::testing::ValuesIn(std::vector<NameIdCase>{
+        {"%1 = OpTypeInt 32 0 %2 = OpConstant %1 0", 2, "uint_0"},
+        {"%1 = OpTypeInt 32 0 %2 = OpConstant %1 1", 2, "uint_1"},
+        {"%1 = OpTypeInt 32 0 %2 = OpConstant %1 2", 2, "uint_2"},
+        {"%1 = OpTypeInt 32 0 %2 = OpConstant %1 9", 2, "uint_9"},
+        {"%1 = OpTypeInt 32 0 %2 = OpConstant %1 42", 2, "uint_42"},
+        {"%1 = OpTypeInt 32 1 %2 = OpConstant %1 0", 2, "int_0"},
+        {"%1 = OpTypeInt 32 1 %2 = OpConstant %1 1", 2, "int_1"},
+        {"%1 = OpTypeInt 32 1 %2 = OpConstant %1 2", 2, "int_2"},
+        {"%1 = OpTypeInt 32 1 %2 = OpConstant %1 9", 2, "int_9"},
+        {"%1 = OpTypeInt 32 1 %2 = OpConstant %1 42", 2, "int_42"},
+        {"%1 = OpTypeInt 32 1 %2 = OpConstant %1 -42", 2, "int_n42"},
+        // Exotic bit widths
+        {"%1 = OpTypeInt 33 0 %2 = OpConstant %1 0", 2, "u33_0"},
+        {"%1 = OpTypeInt 33 1 %2 = OpConstant %1 10", 2, "i33_10"},
+        {"%1 = OpTypeInt 33 1 %2 = OpConstant %1 -19", 2, "i33_n19"},
+    }), );
+
+INSTANTIATE_TEST_CASE_P(
+    SimpleFloatConstants, FriendlyNameTest,
+    ::testing::ValuesIn(std::vector<NameIdCase>{
+        {"%1 = OpTypeFloat 16\n%2 = OpConstant %1 0x1.ff4p+16", 2,
+         "half_0x1_ff4p_16"},
+        {"%1 = OpTypeFloat 16\n%2 = OpConstant %1 -0x1.d2cp-10", 2,
+         "half_n0x1_d2cpn10"},
+        // 32-bit floats
+        {"%1 = OpTypeFloat 32\n%2 = OpConstant %1 -3.275", 2, "float_n3_275"},
+        {"%1 = OpTypeFloat 32\n%2 = OpConstant %1 0x1.8p+128", 2,
+         "float_0x1_8p_128"},  // NaN
+        {"%1 = OpTypeFloat 32\n%2 = OpConstant %1 -0x1.0002p+128", 2,
+         "float_n0x1_0002p_128"},  // NaN
+        {"%1 = OpTypeFloat 32\n%2 = OpConstant %1 0x1p+128", 2,
+         "float_0x1p_128"},  // Inf
+        {"%1 = OpTypeFloat 32\n%2 = OpConstant %1 -0x1p+128", 2,
+         "float_n0x1p_128"},  // -Inf
+                              // 64-bit floats
+        {"%1 = OpTypeFloat 64\n%2 = OpConstant %1 -3.275", 2, "double_n3_275"},
+        {"%1 = OpTypeFloat 64\n%2 = OpConstant %1 0x1.ffffffffffffap-1023", 2,
+         "double_0x1_ffffffffffffapn1023"},  // small normal
+        {"%1 = OpTypeFloat 64\n%2 = OpConstant %1 -0x1.ffffffffffffap-1023", 2,
+         "double_n0x1_ffffffffffffapn1023"},
+        {"%1 = OpTypeFloat 64\n%2 = OpConstant %1 0x1.8p+1024", 2,
+         "double_0x1_8p_1024"},  // NaN
+        {"%1 = OpTypeFloat 64\n%2 = OpConstant %1 -0x1.0002p+1024", 2,
+         "double_n0x1_0002p_1024"},  // NaN
+        {"%1 = OpTypeFloat 64\n%2 = OpConstant %1 0x1p+1024", 2,
+         "double_0x1p_1024"},  // Inf
+        {"%1 = OpTypeFloat 64\n%2 = OpConstant %1 -0x1p+1024", 2,
+         "double_n0x1p_1024"},  // -Inf
+    }), );
+
 }  // anonymous namespace
diff --git a/test/opt/eliminate_dead_const_test.cpp b/test/opt/eliminate_dead_const_test.cpp
index 490132c..92247e0 100644
--- a/test/opt/eliminate_dead_const_test.cpp
+++ b/test/opt/eliminate_dead_const_test.cpp
@@ -98,16 +98,16 @@
           "%14 = OpConstantFalse %bool",
          "%int = OpTypeInt 32 1",
  "%_ptr_Function_int = OpTypePointer Function %int",
-          "%17 = OpConstant %int 1",
+       "%int_1 = OpConstant %int 1",
         "%uint = OpTypeInt 32 0",
  "%_ptr_Function_uint = OpTypePointer Function %uint",
-          "%20 = OpConstant %uint 2",
+      "%uint_2 = OpConstant %uint 2",
        "%float = OpTypeFloat 32",
  "%_ptr_Function_float = OpTypePointer Function %float",
-          "%23 = OpConstant %float 3.14",
+  "%float_3_14 = OpConstant %float 3.14",
       "%double = OpTypeFloat 64",
  "%_ptr_Function_double = OpTypePointer Function %double",
-          "%26 = OpConstant %double 3.14159265358979",
+ "%double_3_14159265358979 = OpConstant %double 3.14159265358979",
         "%main = OpFunction %void None %10",
           "%27 = OpLabel",
          "%btv = OpVariable %_ptr_Function_bool Function",
@@ -118,10 +118,10 @@
           "%dv = OpVariable %_ptr_Function_double Function",
                 "OpStore %btv %13",
                 "OpStore %bfv %14",
-                "OpStore %iv %17",
-                "OpStore %uv %20",
-                "OpStore %fv %23",
-                "OpStore %dv %26",
+                "OpStore %iv %int_1",
+                "OpStore %uv %uint_2",
+                "OpStore %fv %float_3_14",
+                "OpStore %dv %double_3_14159265358979",
                 "OpReturn",
                 "OpFunctionEnd",
       // clang-format on
diff --git a/test/opt/fold_spec_const_op_composite_test.cpp b/test/opt/fold_spec_const_op_composite_test.cpp
index b84bf26..b9afeee 100644
--- a/test/opt/fold_spec_const_op_composite_test.cpp
+++ b/test/opt/fold_spec_const_op_composite_test.cpp
@@ -483,15 +483,15 @@
               },
               // expected
               {
-                "%59 = OpConstant %int 1",
-                "%60 = OpConstant %int 1",
-                "%spec_int_one_vec = OpConstantComposite %v2int %59 %60",
-                "%62 = OpConstant %int 0",
-                "%63 = OpConstant %int 0",
-                "%spec_int_zero_vec = OpConstantComposite %v2int %62 %63",
-                "%65 = OpConstant %int 0",
-                "%66 = OpConstant %int 0",
-                "%spec_int_from_null = OpConstantComposite %v2int %65 %66",
+                "%int_1 = OpConstant %int 1",
+                "%int_1_0 = OpConstant %int 1",
+                "%spec_int_one_vec = OpConstantComposite %v2int %int_1 %int_1_0",
+                "%int_0 = OpConstant %int 0",
+                "%int_0_0 = OpConstant %int 0",
+                "%spec_int_zero_vec = OpConstantComposite %v2int %int_0 %int_0_0",
+                "%int_0_1 = OpConstant %int 0",
+                "%int_0_2 = OpConstant %int 0",
+                "%spec_int_from_null = OpConstantComposite %v2int %int_0_1 %int_0_2",
               },
             },
 
@@ -505,15 +505,15 @@
               },
               // expected
               {
-                "%59 = OpConstant %int 1",
-                "%60 = OpConstant %int 1",
-                "%spec_int_one_vec = OpConstantComposite %v2int %59 %60",
-                "%62 = OpConstant %int 0",
-                "%63 = OpConstant %int 0",
-                "%spec_int_zero_vec = OpConstantComposite %v2int %62 %63",
-                "%65 = OpConstant %int 0",
-                "%66 = OpConstant %int 0",
-                "%spec_int_from_null = OpConstantComposite %v2int %65 %66",
+                "%int_1 = OpConstant %int 1",
+                "%int_1_0 = OpConstant %int 1",
+                "%spec_int_one_vec = OpConstantComposite %v2int %int_1 %int_1_0",
+                "%int_0 = OpConstant %int 0",
+                "%int_0_0 = OpConstant %int 0",
+                "%spec_int_zero_vec = OpConstantComposite %v2int %int_0 %int_0_0",
+                "%int_0_1 = OpConstant %int 0",
+                "%int_0_2 = OpConstant %int 0",
+                "%spec_int_from_null = OpConstantComposite %v2int %int_0_1 %int_0_2",
               },
             },
 
@@ -527,15 +527,15 @@
               },
               // expected
               {
-                "%59 = OpConstant %uint 1",
-                "%60 = OpConstant %uint 1",
-                "%spec_uint_one_vec = OpConstantComposite %v2uint %59 %60",
-                "%62 = OpConstant %uint 0",
-                "%63 = OpConstant %uint 0",
-                "%spec_uint_zero_vec = OpConstantComposite %v2uint %62 %63",
-                "%65 = OpConstant %uint 0",
-                "%66 = OpConstant %uint 0",
-                "%spec_uint_from_null = OpConstantComposite %v2uint %65 %66",
+                "%uint_1 = OpConstant %uint 1",
+                "%uint_1_0 = OpConstant %uint 1",
+                "%spec_uint_one_vec = OpConstantComposite %v2uint %uint_1 %uint_1_0",
+                "%uint_0 = OpConstant %uint 0",
+                "%uint_0_0 = OpConstant %uint 0",
+                "%spec_uint_zero_vec = OpConstantComposite %v2uint %uint_0 %uint_0_0",
+                "%uint_0_1 = OpConstant %uint 0",
+                "%uint_0_2 = OpConstant %uint 0",
+                "%spec_uint_from_null = OpConstantComposite %v2uint %uint_0_1 %uint_0_2",
               },
             },
 
@@ -549,15 +549,15 @@
               },
               // expected
               {
-                "%59 = OpConstant %uint 1",
-                "%60 = OpConstant %uint 1",
-                "%spec_uint_one_vec = OpConstantComposite %v2uint %59 %60",
-                "%62 = OpConstant %uint 0",
-                "%63 = OpConstant %uint 0",
-                "%spec_uint_zero_vec = OpConstantComposite %v2uint %62 %63",
-                "%65 = OpConstant %uint 0",
-                "%66 = OpConstant %uint 0",
-                "%spec_uint_from_null = OpConstantComposite %v2uint %65 %66",
+                "%uint_1 = OpConstant %uint 1",
+                "%uint_1_0 = OpConstant %uint 1",
+                "%spec_uint_one_vec = OpConstantComposite %v2uint %uint_1 %uint_1_0",
+                "%uint_0 = OpConstant %uint 0",
+                "%uint_0_0 = OpConstant %uint 0",
+                "%spec_uint_zero_vec = OpConstantComposite %v2uint %uint_0 %uint_0_0",
+                "%uint_0_1 = OpConstant %uint 0",
+                "%uint_0_2 = OpConstant %uint 0",
+                "%spec_uint_from_null = OpConstantComposite %v2uint %uint_0_1 %uint_0_2",
               },
             },
         // clang-format on
@@ -834,15 +834,15 @@
               },
               // expected
               {
-                "%59 = OpConstant %int -1",
-                "%60 = OpConstant %int -1",
-                "%v2int_minus_1 = OpConstantComposite %v2int %59 %60",
-                "%62 = OpConstant %int -2",
-                "%63 = OpConstant %int -2",
-                "%v2int_minus_2 = OpConstantComposite %v2int %62 %63",
-                "%65 = OpConstant %int 0",
-                "%66 = OpConstant %int 0",
-                "%v2int_neg_null = OpConstantComposite %v2int %65 %66",
+                "%int_n1 = OpConstant %int -1",
+                "%int_n1_0 = OpConstant %int -1",
+                "%v2int_minus_1 = OpConstantComposite %v2int %int_n1 %int_n1_0",
+                "%int_n2 = OpConstant %int -2",
+                "%int_n2_0 = OpConstant %int -2",
+                "%v2int_minus_2 = OpConstantComposite %v2int %int_n2 %int_n2_0",
+                "%int_0 = OpConstant %int 0",
+                "%int_0_0 = OpConstant %int 0",
+                "%v2int_neg_null = OpConstantComposite %v2int %int_0 %int_0_0",
               },
             },
             // vector integer (including null vetors) add, sub, div, mul
@@ -863,37 +863,37 @@
               },
               // expected
               {
-                "%66 = OpConstant %int 5",
-                "%67 = OpConstant %int 5",
-                "%spec_v2int_iadd = OpConstantComposite %v2int %66 %67",
-                "%69 = OpConstant %int -4",
-                "%70 = OpConstant %int -4",
-                "%spec_v2int_isub = OpConstantComposite %v2int %69 %70",
-                "%72 = OpConstant %int -2",
-                "%73 = OpConstant %int -2",
-                "%spec_v2int_sdiv = OpConstantComposite %v2int %72 %73",
-                "%75 = OpConstant %int -6",
-                "%76 = OpConstant %int -6",
-                "%spec_v2int_imul = OpConstantComposite %v2int %75 %76",
-                "%78 = OpConstant %int -6",
-                "%79 = OpConstant %int -6",
-                "%spec_v2int_iadd_null = OpConstantComposite %v2int %78 %79",
+                "%int_5 = OpConstant %int 5",
+                "%int_5_0 = OpConstant %int 5",
+                "%spec_v2int_iadd = OpConstantComposite %v2int %int_5 %int_5_0",
+                "%int_n4 = OpConstant %int -4",
+                "%int_n4_0 = OpConstant %int -4",
+                "%spec_v2int_isub = OpConstantComposite %v2int %int_n4 %int_n4_0",
+                "%int_n2 = OpConstant %int -2",
+                "%int_n2_0 = OpConstant %int -2",
+                "%spec_v2int_sdiv = OpConstantComposite %v2int %int_n2 %int_n2_0",
+                "%int_n6 = OpConstant %int -6",
+                "%int_n6_0 = OpConstant %int -6",
+                "%spec_v2int_imul = OpConstantComposite %v2int %int_n6 %int_n6_0",
+                "%int_n6_1 = OpConstant %int -6",
+                "%int_n6_2 = OpConstant %int -6",
+                "%spec_v2int_iadd_null = OpConstantComposite %v2int %int_n6_1 %int_n6_2",
 
-                "%81 = OpConstant %uint 5",
-                "%82 = OpConstant %uint 5",
-                "%spec_v2uint_iadd = OpConstantComposite %v2uint %81 %82",
-                "%84 = OpConstant %uint 4294967292",
-                "%85 = OpConstant %uint 4294967292",
-                "%spec_v2uint_isub = OpConstantComposite %v2uint %84 %85",
-                "%87 = OpConstant %uint 1431655764",
-                "%88 = OpConstant %uint 1431655764",
-                "%spec_v2uint_udiv = OpConstantComposite %v2uint %87 %88",
-                "%90 = OpConstant %uint 2863311528",
-                "%91 = OpConstant %uint 2863311528",
-                "%spec_v2uint_imul = OpConstantComposite %v2uint %90 %91",
-                "%93 = OpConstant %uint 2863311528",
-                "%94 = OpConstant %uint 2863311528",
-                "%spec_v2uint_isub_null = OpConstantComposite %v2uint %93 %94",
+                "%uint_5 = OpConstant %uint 5",
+                "%uint_5_0 = OpConstant %uint 5",
+                "%spec_v2uint_iadd = OpConstantComposite %v2uint %uint_5 %uint_5_0",
+                "%uint_4294967292 = OpConstant %uint 4294967292",
+                "%uint_4294967292_0 = OpConstant %uint 4294967292",
+                "%spec_v2uint_isub = OpConstantComposite %v2uint %uint_4294967292 %uint_4294967292_0",
+                "%uint_1431655764 = OpConstant %uint 1431655764",
+                "%uint_1431655764_0 = OpConstant %uint 1431655764",
+                "%spec_v2uint_udiv = OpConstantComposite %v2uint %uint_1431655764 %uint_1431655764_0",
+                "%uint_2863311528 = OpConstant %uint 2863311528",
+                "%uint_2863311528_0 = OpConstant %uint 2863311528",
+                "%spec_v2uint_imul = OpConstantComposite %v2uint %uint_2863311528 %uint_2863311528_0",
+                "%uint_2863311528_1 = OpConstant %uint 2863311528",
+                "%uint_2863311528_2 = OpConstant %uint 2863311528",
+                "%spec_v2uint_isub_null = OpConstantComposite %v2uint %uint_2863311528_1 %uint_2863311528_2",
               },
             },
             // vector integer rem, mod
@@ -936,35 +936,35 @@
                 "%v2int_minus_3 = OpConstantComposite %v2int %int_minus_3 %int_minus_3",
 
                 // srem
-                "%73 = OpConstant %int 1",
-                "%74 = OpConstant %int 1",
-                "%7_srem_3 = OpConstantComposite %v2int %73 %74",
-                "%76 = OpConstant %int -1",
-                "%77 = OpConstant %int -1",
-                "%minus_7_srem_3 = OpConstantComposite %v2int %76 %77",
-                "%79 = OpConstant %int 1",
-                "%80 = OpConstant %int 1",
-                "%7_srem_minus_3 = OpConstantComposite %v2int %79 %80",
-                "%82 = OpConstant %int -1",
-                "%83 = OpConstant %int -1",
-                "%minus_7_srem_minus_3 = OpConstantComposite %v2int %82 %83",
+                "%int_1 = OpConstant %int 1",
+                "%int_1_0 = OpConstant %int 1",
+                "%7_srem_3 = OpConstantComposite %v2int %int_1 %int_1_0",
+                "%int_n1 = OpConstant %int -1",
+                "%int_n1_0 = OpConstant %int -1",
+                "%minus_7_srem_3 = OpConstantComposite %v2int %int_n1 %int_n1_0",
+                "%int_1_1 = OpConstant %int 1",
+                "%int_1_2 = OpConstant %int 1",
+                "%7_srem_minus_3 = OpConstantComposite %v2int %int_1_1 %int_1_2",
+                "%int_n1_1 = OpConstant %int -1",
+                "%int_n1_2 = OpConstant %int -1",
+                "%minus_7_srem_minus_3 = OpConstantComposite %v2int %int_n1_1 %int_n1_2",
                 // smod
-                "%85 = OpConstant %int 1",
-                "%86 = OpConstant %int 1",
-                "%7_smod_3 = OpConstantComposite %v2int %85 %86",
-                "%88 = OpConstant %int 2",
-                "%89 = OpConstant %int 2",
-                "%minus_7_smod_3 = OpConstantComposite %v2int %88 %89",
-                "%91 = OpConstant %int -2",
-                "%92 = OpConstant %int -2",
-                "%7_smod_minus_3 = OpConstantComposite %v2int %91 %92",
-                "%94 = OpConstant %int -1",
-                "%95 = OpConstant %int -1",
-                "%minus_7_smod_minus_3 = OpConstantComposite %v2int %94 %95",
+                "%int_1_3 = OpConstant %int 1",
+                "%int_1_4 = OpConstant %int 1",
+                "%7_smod_3 = OpConstantComposite %v2int %int_1_3 %int_1_4",
+                "%int_2 = OpConstant %int 2",
+                "%int_2_0 = OpConstant %int 2",
+                "%minus_7_smod_3 = OpConstantComposite %v2int %int_2 %int_2_0",
+                "%int_n2 = OpConstant %int -2",
+                "%int_n2_0 = OpConstant %int -2",
+                "%7_smod_minus_3 = OpConstantComposite %v2int %int_n2 %int_n2_0",
+                "%int_n1_3 = OpConstant %int -1",
+                "%int_n1_4 = OpConstant %int -1",
+                "%minus_7_smod_minus_3 = OpConstantComposite %v2int %int_n1_3 %int_n1_4",
                 // umod
-                "%97 = OpConstant %uint 1",
-                "%98 = OpConstant %uint 1",
-                "%7_umod_3 = OpConstantComposite %v2uint %97 %98",
+                "%uint_1 = OpConstant %uint 1",
+                "%uint_1_0 = OpConstant %uint 1",
+                "%7_umod_3 = OpConstantComposite %v2uint %uint_1 %uint_1_0",
               },
             },
             // vector integer bitwise, shift
@@ -983,27 +983,27 @@
               },
               // expected
               {
-                "%64 = OpConstant %int 2",
-                "%65 = OpConstant %int 2",
-                "%xor_1_3 = OpConstantComposite %v2int %64 %65",
-                "%67 = OpConstant %int 0",
-                "%68 = OpConstant %int 0",
-                "%and_1_2 = OpConstantComposite %v2int %67 %68",
-                "%70 = OpConstant %int 3",
-                "%71 = OpConstant %int 3",
-                "%or_1_2 = OpConstantComposite %v2int %70 %71",
+                "%int_2 = OpConstant %int 2",
+                "%int_2_0 = OpConstant %int 2",
+                "%xor_1_3 = OpConstantComposite %v2int %int_2 %int_2_0",
+                "%int_0 = OpConstant %int 0",
+                "%int_0_0 = OpConstant %int 0",
+                "%and_1_2 = OpConstantComposite %v2int %int_0 %int_0_0",
+                "%int_3 = OpConstant %int 3",
+                "%int_3_0 = OpConstant %int 3",
+                "%or_1_2 = OpConstantComposite %v2int %int_3 %int_3_0",
 
                 "%unsigned_31 = OpConstant %uint 31",
                 "%v2unsigned_31 = OpConstantComposite %v2uint %unsigned_31 %unsigned_31",
-                "%73 = OpConstant %uint 2147483648",
-                "%74 = OpConstant %uint 2147483648",
-                "%unsigned_left_shift_max = OpConstantComposite %v2uint %73 %74",
-                "%76 = OpConstant %uint 1",
-                "%77 = OpConstant %uint 1",
-                "%unsigned_right_shift_logical = OpConstantComposite %v2uint %76 %77",
-                "%79 = OpConstant %int -1",
-                "%80 = OpConstant %int -1",
-                "%signed_right_shift_arithmetic = OpConstantComposite %v2int %79 %80",
+                "%uint_2147483648 = OpConstant %uint 2147483648",
+                "%uint_2147483648_0 = OpConstant %uint 2147483648",
+                "%unsigned_left_shift_max = OpConstantComposite %v2uint %uint_2147483648 %uint_2147483648_0",
+                "%uint_1 = OpConstant %uint 1",
+                "%uint_1_0 = OpConstant %uint 1",
+                "%unsigned_right_shift_logical = OpConstantComposite %v2uint %uint_1 %uint_1_0",
+                "%int_n1 = OpConstant %int -1",
+                "%int_n1_0 = OpConstant %int -1",
+                "%signed_right_shift_arithmetic = OpConstantComposite %v2int %int_n1 %int_n1_0",
               },
             },
             // Skip folding if any vector operands or components of the operands
@@ -1375,9 +1375,9 @@
               "%spec_int_19 = OpConstant %int -1",
               "%spec_int_20 = OpConstant %int 101",
               "%used_vec_a = OpConstantComposite %v2int %spec_int_18 %spec_int_19",
-              "%104 = OpConstant %int 10201",
-              "%105 = OpConstant %int 1",
-              "%used_vec_b = OpConstantComposite %v2int %104 %105",
+              "%int_10201 = OpConstant %int 10201",
+              "%int_1 = OpConstant %int 1",
+              "%used_vec_b = OpConstantComposite %v2int %int_10201 %int_1",
               "%spec_int_21 = OpConstant %int 10201",
               "%array = OpConstantComposite %type_arr_int_4 %spec_int_20 %spec_int_20 %spec_int_21 %spec_int_21",
               "%spec_int_22 = OpSpecConstant %int 123",
diff --git a/test/opt/freeze_spec_const_test.cpp b/test/opt/freeze_spec_const_test.cpp
index 6c09493..0fd0fe4 100644
--- a/test/opt/freeze_spec_const_test.cpp
+++ b/test/opt/freeze_spec_const_test.cpp
@@ -51,13 +51,13 @@
         // Type declaration, original spec constant definition, expected frozen
         // spec constants.
         {"%int = OpTypeInt 32 1", "%2 = OpSpecConstant %int 1",
-         "%2 = OpConstant %int 1"},
+         "%int_1 = OpConstant %int 1"},
         {"%uint = OpTypeInt 32 0", "%2 = OpSpecConstant %uint 1",
-         "%2 = OpConstant %uint 1"},
+         "%uint_1 = OpConstant %uint 1"},
         {"%float = OpTypeFloat 32", "%2 = OpSpecConstant %float 3.14",
-         "%2 = OpConstant %float 3.14"},
+         "%float_3_14 = OpConstant %float 3.14"},
         {"%double = OpTypeFloat 64", "%2 = OpSpecConstant %double 3.1415926",
-         "%2 = OpConstant %double 3.1415926"},
+         "%double_3_1415926 = OpConstant %double 3.1415926"},
         {"%bool = OpTypeBool", "%2 = OpSpecConstantTrue %bool",
          "%2 = OpConstantTrue %bool"},
         {"%bool = OpTypeBool", "%2 = OpSpecConstantFalse %bool",
@@ -103,12 +103,16 @@
   std::string expected_disassembly = SelectiveJoin(text, [](const char* line) {
     return std::string(line).find("SpecId") != std::string::npos;
   });
-  std::vector<std::pair<const char*, const char*>> opcode_replacement_pairs = {
-      {" OpSpecConstant ", " OpConstant "},
+  std::vector<std::pair<const char*, const char*>> replacement_pairs = {
+      {"%3 = OpSpecConstant %int 3", "%int_3 = OpConstant %int 3"},
+      {"%4 = OpSpecConstant %float 3.14",
+       "%float_3_14 = OpConstant %float 3.14"},
+      {"%5 = OpSpecConstant %double 3.14159265358979",
+       "%double_3_14159265358979 = OpConstant %double 3.14159265358979"},
       {" OpSpecConstantTrue ", " OpConstantTrue "},
       {" OpSpecConstantFalse ", " OpConstantFalse "},
   };
-  for (auto& p : opcode_replacement_pairs) {
+  for (auto& p : replacement_pairs) {
     EXPECT_TRUE(FindAndReplace(&expected_disassembly, p.first, p.second))
         << "text:\n"
         << expected_disassembly << "\n"
diff --git a/test/opt/ir_loader_test.cpp b/test/opt/ir_loader_test.cpp
index 854115a..4e40e70 100644
--- a/test/opt/ir_loader_test.cpp
+++ b/test/opt/ir_loader_test.cpp
@@ -61,14 +61,14 @@
         "%int = OpTypeInt 32 1\n"
  "%_ptr_Function_int = OpTypePointer Function %int\n"
          "%12 = OpTypeFunction %int %_ptr_Function_int %_ptr_Function_int\n"
-         "%13 = OpConstant %int 1\n"
-         "%14 = OpConstant %int 2\n"
+      "%int_1 = OpConstant %int 1\n"
+      "%int_2 = OpConstant %int 2\n"
        "%main = OpFunction %void None %9\n"
          "%15 = OpLabel\n"
       "%param = OpVariable %_ptr_Function_int Function\n"
     "%param_0 = OpVariable %_ptr_Function_int Function\n"
-               "OpStore %param %13\n"
-               "OpStore %param_0 %14\n"
+               "OpStore %param %int_1\n"
+               "OpStore %param_0 %int_2\n"
          "%16 = OpFunctionCall %int %add_i1_i1_ %param %param_0\n"
                "OpReturn\n"
                "OpFunctionEnd\n"
@@ -159,15 +159,15 @@
          "%12 = OpTypeFunction %float\n"
  "%_ptr_Private_float = OpTypePointer Private %float\n"
         "%gv1 = OpVariable %_ptr_Private_float Private\n"
-         "%14 = OpConstant %float 10\n"
+   "%float_10 = OpConstant %float 10\n"
         "%gv2 = OpVariable %_ptr_Private_float Private\n"
-         "%15 = OpConstant %float 100\n"
+  "%float_100 = OpConstant %float 100\n"
  "%_ptr_Function_float = OpTypePointer Function %float\n"
        "%main = OpFunction %void None %10\n"
          "%17 = OpLabel\n"
       "%lv1_0 = OpVariable %_ptr_Function_float Function\n"
-               "OpStore %gv1 %14\n"
-               "OpStore %gv2 %15\n"
+               "OpStore %gv1 %float_10\n"
+               "OpStore %gv2 %float_100\n"
          "%18 = OpLoad %float %gv1\n"
          "%19 = OpLoad %float %gv2\n"
          "%20 = OpFSub %float %18 %19\n"
@@ -204,7 +204,7 @@
        "%uint = OpTypeInt 32 0\n"
       "%float = OpTypeFloat 32\n"
           "%4 = OpUndef %int\n"
-          "%5 = OpConstant %int 10\n"
+     "%int_10 = OpConstant %int 10\n"
           "%6 = OpUndef %uint\n"
        "%bool = OpTypeBool\n"
           "%8 = OpUndef %float\n"
diff --git a/test/opt/set_spec_const_default_value_test.cpp b/test/opt/set_spec_const_default_value_test.cpp
index 0d4a1d2..a6eaab9 100644
--- a/test/opt/set_spec_const_default_value_test.cpp
+++ b/test/opt/set_spec_const_default_value_test.cpp
@@ -473,13 +473,13 @@
             // code
             "OpDecorate %1 SpecId 100\n"
             "%int = OpTypeInt 32 1\n"
-            "%1 = OpConstant %int 101\n",
+            "%int_101 = OpConstant %int 101\n",
             // default values
             SpecIdToValueStrMap{{100, "0x7fffffff"}},
             // expected
             "OpDecorate %1 SpecId 100\n"
             "%int = OpTypeInt 32 1\n"
-            "%1 = OpConstant %int 101\n",
+            "%int_101 = OpConstant %int 101\n",
         },
         // 3. Do nothing when SpecId decoration is not attached to a
         // OpSpecConstant{|True|False} instruction.
@@ -527,7 +527,7 @@
             "%1 = OpDecorationGroup\n"
             "OpGroupDecorate %1 %2\n"
             "%int = OpTypeInt 32 1\n"
-            "%2 = OpConstant %int 100\n",
+            "%int_100 = OpConstant %int 100\n",
             // default values
             SpecIdToValueStrMap{{100, "0xffffffff"}},
             // expected
@@ -535,7 +535,7 @@
             "%1 = OpDecorationGroup\n"
             "OpGroupDecorate %1 %2\n"
             "%int = OpTypeInt 32 1\n"
-            "%2 = OpConstant %int 100\n",
+            "%int_100 = OpConstant %int 100\n",
         },
     }));