[InstCombine] Make test resilient to metadata presence (llvm#157607)

Modernized it to using `update_test_checks`​ which addresses an ambgiuty
in the previous test formulation, where a profile metadaat of value `i32
1`​ would have (incorrectly matched.

Author: mtrofin

llvm/test/Transforms/InstCombine/2004-09-20-BadLoadCombine2.ll

@@ -1,25 +1,35 @@
-; RUN: opt < %s -passes=instcombine,mem2reg,simplifycfg -simplifycfg-require-and-preserve-domtree=1 | \
-; RUN:   llvm-dis | grep -v store | not grep "i32 1"
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt %s -passes=instcombine,mem2reg,simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -o - | FileCheck %s
 
 ; Test to make sure that instcombine does not accidentally propagate the load
 ; into the PHI, which would break the program.
 
 define i32 @test(i1 %C) {
+; CHECK-LABEL: define i32 @test(
+; CHECK-SAME: i1 [[C:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    [[X:%.*]] = alloca i32, align 4
+; CHECK-NEXT:    [[X2:%.*]] = alloca i32, align 4
+; CHECK-NEXT:    store i32 1, ptr [[X]], align 4
+; CHECK-NEXT:    store i32 2, ptr [[X2]], align 4
+; CHECK-NEXT:    [[SPEC_SELECT:%.*]] = select i1 [[C]], ptr [[X]], ptr [[X2]]
+; CHECK-NEXT:    store i32 3, ptr [[X]], align 4
+; CHECK-NEXT:    [[TMP_3:%.*]] = load i32, ptr [[SPEC_SELECT]], align 4
+; CHECK-NEXT:    ret i32 [[TMP_3]]
+;
 entry:
-        %X = alloca i32         ; <ptr> [#uses=3]
-        %X2 = alloca i32                ; <ptr> [#uses=2]
-        store i32 1, ptr %X
-        store i32 2, ptr %X2
-        br i1 %C, label %cond_true.i, label %cond_continue.i
+  %X = alloca i32         ; <ptr> [#uses=3]
+  %X2 = alloca i32                ; <ptr> [#uses=2]
+  store i32 1, ptr %X
+  store i32 2, ptr %X2
+  br i1 %C, label %cond_true.i, label %cond_continue.i
 
 cond_true.i:            ; preds = %entry
-        br label %cond_continue.i
+  br label %cond_continue.i
 
 cond_continue.i:                ; preds = %cond_true.i, %entry
-        %mem_tmp.i.0 = phi ptr [ %X, %cond_true.i ], [ %X2, %entry ]           ; <ptr> [#uses=1]
-        store i32 3, ptr %X
-        %tmp.3 = load i32, ptr %mem_tmp.i.0         ; <i32> [#uses=1]
-        ret i32 %tmp.3
+  %mem_tmp.i.0 = phi ptr [ %X, %cond_true.i ], [ %X2, %entry ]           ; <ptr> [#uses=1]
+  store i32 3, ptr %X
+  %tmp.3 = load i32, ptr %mem_tmp.i.0         ; <i32> [#uses=1]
+  ret i32 %tmp.3
 }
-
-

llvm/utils/profcheck-xfail.txt

@@ -830,7 +830,6 @@ Transforms/IndVarSimplify/invalidate-modified-lcssa-phi.ll
 Transforms/IndVarSimplify/pr45835.ll
 Transforms/IndVarSimplify/preserving-debugloc-rem-div.ll
 Transforms/Inline/optimization-remarks-hotness-threshold.ll
-Transforms/InstCombine/2004-09-20-BadLoadCombine2.ll
 Transforms/InstCombine/2004-09-20-BadLoadCombine.ll
 Transforms/InstCombine/2005-04-07-UDivSelectCrash.ll
 Transforms/InstCombine/2011-02-14-InfLoop.ll