caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
4794bbffb228894de3ca0dad50fc027eb94f743e
clang-p2996/llvm/test/Transforms/InstCombine/snprintf.ll
Nikita Popov fabe915705 [SimplifyLibCalls] Use inbounds GEP 
When converting strchr(p, '\0') to p + strlen(p) we know that
strlen() must return an offset that is inbounds of the allocated
object (otherwise it would be UB), so we can use an inbounds GEP.
An equivalent argument can be made for the other cases.
2022-07-01 14:31:44 +02:00

180 lines
8.1 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
@.str = private unnamed_addr constant [4 x i8] c"str\00", align 1
@.str.1 = private unnamed_addr constant [3 x i8] c"%%\00", align 1
@.str.2 = private unnamed_addr constant [3 x i8] c"%c\00", align 1
@.str.3 = private unnamed_addr constant [3 x i8] c"%s\00", align 1
@.str.4 = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
declare i32 @snprintf(i8*, i64, i8*, ...) #1
define void @test_not_const_fmt(i8* %buf, i8* %fmt) #0 {
; CHECK-LABEL: @test_not_const_fmt(
; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* noundef nonnull dereferenceable(1) [[BUF:%.*]], i64 32, i8* [[FMT:%.*]])
; CHECK-NEXT: ret void
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* %fmt) #2
ret void
}
; size is '0', do not add nonnull attribute
define void @test_not_const_fmt_zero_size_return_value(i8* %buf, i8* %fmt) #0 {
; CHECK-LABEL: @test_not_const_fmt_zero_size_return_value(
; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* [[BUF:%.*]], i64 0, i8* [[FMT:%.*]])
; CHECK-NEXT: ret void
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 0, i8* %fmt) #2
ret void
}
define void @test_not_const_size(i8* %buf, i64 %size) #0 {
; CHECK-LABEL: @test_not_const_size(
; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* [[BUF:%.*]], i64 [[SIZE:%.*]], i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
; CHECK-NEXT: ret void
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 %size, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
ret void
}
define i32 @test_return_value(i8* %buf) #0 {
; CHECK-LABEL: @test_return_value(
; CHECK-NEXT: ret i32 3
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
ret i32 %call
}
define void @test_percentage(i8* %buf) #0 {
; CHECK-LABEL: @test_percentage(
; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* noundef nonnull dereferenceable(1) [[BUF:%.*]], i64 32, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT: ret void
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0)) #2
ret void
}
define i32 @test_null_buf_return_value() #0 {
; CHECK-LABEL: @test_null_buf_return_value(
; CHECK-NEXT: ret i32 3
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
ret i32 %call
}
define i32 @test_percentage_return_value() #0 {
; CHECK-LABEL: @test_percentage_return_value(
; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* null, i64 0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0)) #3
ret i32 %call
}
define void @test_correct_copy(i8* %buf) #0 {
; CHECK-LABEL: @test_correct_copy(
; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[BUF:%.*]] to i32*
; CHECK-NEXT: store i32 7500915, i32* [[TMP1]], align 1
; CHECK-NEXT: ret void
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
ret void
}
define i32 @test_char_zero_size(i8* %buf) #0 {
; CHECK-LABEL: @test_char_zero_size(
; CHECK-NEXT: ret i32 1
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 65) #2
ret i32 %call
}
define i32 @test_char_wrong_size(i8* %buf) #0 {
; CHECK-LABEL: @test_char_wrong_size(
; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* noundef nonnull dereferenceable(1) [[BUF:%.*]], i64 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 65)
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 65) #2
ret i32 %call
}
define i32 @test_char_ok_size(i8* %buf) #0 {
; CHECK-LABEL: @test_char_ok_size(
; CHECK-NEXT: store i8 65, i8* [[BUF:%.*]], align 1
; CHECK-NEXT: [[NUL:%.*]] = getelementptr inbounds i8, i8* [[BUF]], i64 1
; CHECK-NEXT: store i8 0, i8* [[NUL]], align 1
; CHECK-NEXT: ret i32 1
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 65) #2
ret i32 %call
}
define i32 @test_str_zero_size(i8* %buf) #0 {
; CHECK-LABEL: @test_str_zero_size(
; CHECK-NEXT: ret i32 3
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
ret i32 %call
}
define i32 @test_str_wrong_size(i8* %buf) #0 {
; CHECK-LABEL: @test_str_wrong_size(
; CHECK-NEXT: [[CALL:%.*]] = call i32 (i8*, i64, i8*, ...) @snprintf(i8* noundef nonnull dereferenceable(1) [[BUF:%.*]], i64 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
ret i32 %call
}
define i32 @test_str_ok_size(i8* %buf) #0 {
; CHECK-LABEL: @test_str_ok_size(
; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[BUF:%.*]] to i32*
; CHECK-NEXT: store i32 7500915, i32* [[TMP1]], align 1
; CHECK-NEXT: ret i32 3
;
%call = call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 32, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0)) #2
ret i32 %call
}
; snprintf(buf, 32, "") -> memcpy -> store
define i32 @test_str_ok_size_tail(i8* %buf) {
; CHECK-LABEL: @test_str_ok_size_tail(
; CHECK-NEXT: store i8 0, i8* [[BUF:%.*]], align 1
; CHECK-NEXT: ret i32 0
;
%1 = tail call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 8, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.4, i64 0, i64 0))
ret i32 %1
}
define i32 @test_str_ok_size_musttail(i8* %buf, i64 %x, i8* %y, ...) {
; CHECK-LABEL: @test_str_ok_size_musttail(
; CHECK-NEXT: [[TMP1:%.*]] = musttail call i32 (i8*, i64, i8*, ...) @snprintf(i8* [[BUF:%.*]], i64 8, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.4, i64 0, i64 0), ...)
; CHECK-NEXT: ret i32 [[TMP1]]
;
%1 = musttail call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 8, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.4, i64 0, i64 0), ...)
ret i32 %1
}
; snprintf(buf, 32, "%s", "str") -> memcpy -> store
define i32 @test_str_ok_size_tail2(i8* %buf) {
; CHECK-LABEL: @test_str_ok_size_tail2(
; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[BUF:%.*]] to i32*
; CHECK-NEXT: store i32 7500915, i32* [[TMP1]], align 1
; CHECK-NEXT: ret i32 3
;
%1 = tail call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
ret i32 %1
}
define i32 @test_str_ok_size_musttail2(i8* %buf, i64 %x, i8* %y, ...) {
; CHECK-LABEL: @test_str_ok_size_musttail2(
; CHECK-NEXT: [[TMP1:%.*]] = musttail call i32 (i8*, i64, i8*, ...) @snprintf(i8* [[BUF:%.*]], i64 8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), ...)
; CHECK-NEXT: ret i32 [[TMP1]]
;
%1 = musttail call i32 (i8*, i64, i8*, ...) @snprintf(i8* %buf, i64 8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), ...)
ret i32 %1
}
Reference in New Issue View Git Blame Copy Permalink