[llvm] llvm-reduce: Increase operands-to-args test coverage (PR #133853)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/133853

This wasn't checking the output for all functions.
--match-full-lines is also particularly hazardous for the
interestingness checks for avoiding asserts and broken IR.

Also add tests for some of the filtered function user types.
This wasn't covered, and is overly conservative.

>From fbb3c41ac46ca03f5b6539fb2ffae58b6c75b8cf Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Tue, 1 Apr 2025 10:28:26 +0700
Subject: [PATCH] llvm-reduce: Increase operands-to-args test coverage

This wasn't checking the output for all functions.
--match-full-lines is also particularly hazardous for the
interestingness checks for avoiding asserts and broken IR.

Also add tests for some of the filtered function user types.
This wasn't covered, and is overly conservative.
---
 .../tools/llvm-reduce/operands-to-args.ll     | 63 ++++++++++++++++---
 1 file changed, 55 insertions(+), 8 deletions(-)

diff --git a/llvm/test/tools/llvm-reduce/operands-to-args.ll b/llvm/test/tools/llvm-reduce/operands-to-args.ll
index bb2d3363eff11..3378f15e58936 100644
--- a/llvm/test/tools/llvm-reduce/operands-to-args.ll
+++ b/llvm/test/tools/llvm-reduce/operands-to-args.ll
@@ -1,6 +1,7 @@
-; RUN: llvm-reduce %s -o %t --abort-on-invalid-reduction --delta-passes=operands-to-args --test FileCheck --test-arg %s --test-arg --match-full-lines --test-arg --check-prefix=INTERESTING --test-arg --input-file
-; RUN: FileCheck %s --input-file %t --check-prefixes=REDUCED,INTERESTING
+; RUN: llvm-reduce %s -o %t --abort-on-invalid-reduction --delta-passes=operands-to-args --test FileCheck --test-arg %s --test-arg --check-prefix=INTERESTING --test-arg --input-file
+; RUN: FileCheck %s --input-file %t --check-prefix=REDUCED
 
+; INTERESTING-LABEL: define void @func(
 ; REDUCED-LABEL: define void @func(i32 %k, ptr %Local, ptr %Global) {
 
 ; Keep one reference to the original value.
@@ -19,9 +20,6 @@
 ; INTERESTING: %[[KEEP:LocalKeep[0-9]*]] = add i32 %k, 21
 ; INTERESTING: store i32 %[[KEEP]], ptr @GlobalKeep, align 4
 
-; INTERESTING-LABEL: define void @func_caller() {
-; REDUCED:             call void @func(i32 21, ptr null, ptr null)
-
 
 @Global = global i32 42
 @GlobalKeep = global i32 42
@@ -47,7 +45,9 @@ entry:
   ret void
 }
 
-
+; INTERESTING-LABEL: define void @func_caller(
+; REDUCED-LABEL: define void @func_caller() {
+; REDUCED: call void @func(i32 21, ptr null, ptr null)
 define void @func_caller() {
 entry:
   call void @func(i32 21)
@@ -58,14 +58,61 @@ entry:
 ; Make sure to skip functions with non-direct call users
 declare void @e(ptr)
 
-; INTERESTING-LABEL: define void @g() {
+; INTERESTING-LABEL: define void @g(
+; REDUCED-LABEL: define void @g(ptr %f) {
+; REDUCED: call void @e(ptr %f)
 define void @g() {
   call void @e(ptr @f)
   ret void
 }
 
-; INTERESTING-LABEL: define void @f(ptr %a) {
+; INTERESTING-LABEL: define void @f(
+; REDUCED-LABEL: define void @f(ptr %a) {
+; REDUCED: %1 = load ptr, ptr %a, align 8
 define void @f(ptr %a) {
   %1 = load ptr, ptr %a
   ret void
 }
+
+ at gv_init_use = global [1 x ptr] [ptr @has_global_init_user]
+
+; INTERESTING-LABEL: define void @has_global_init_user(
+; REDUCED-LABEL: define void @has_global_init_user() {
+define void @has_global_init_user() {
+  %Local = alloca i32, align 4
+  store i32 42, ptr %Local, align 4
+  ret void
+}
+
+; INTERESTING-LABEL: define void @has_callee_and_arg_user(
+; REDUCED-LABEL: define void @has_callee_and_arg_user(ptr %orig.arg) {
+define void @has_callee_and_arg_user(ptr %orig.arg) {
+  %Local = alloca i32, align 4
+  store i32 42, ptr %Local, align 4
+  ret void
+}
+
+declare void @ptr_user(ptr)
+
+; INTERESTING-LABEL: define void @calls_and_passes_func(
+; REDUCED-LABEL: define void @calls_and_passes_func(ptr %has_callee_and_arg_user) {
+; REDUCED: call void @has_callee_and_arg_user(ptr %has_callee_and_arg_user)
+define void @calls_and_passes_func() {
+  call void @has_callee_and_arg_user(ptr @has_callee_and_arg_user)
+  ret void
+}
+
+; INTERESTING-LABEL: define void @has_wrong_callsite_type_user(
+; REDUCED-LABEL: define void @has_wrong_callsite_type_user(i32 %extra.arg, ptr %Local) {
+define void @has_wrong_callsite_type_user(i32 %extra.arg) {
+  %Local = alloca i32, align 4
+  store i32 42, ptr %Local, align 4
+  ret void
+}
+
+; INTERESTING-LABEL: define void @calls_wrong_func_type(
+; REDUCED: call void @has_wrong_callsite_type_user()
+define void @calls_wrong_func_type() {
+  call void @has_wrong_callsite_type_user()
+  ret void
+}