llvm/test/Transforms/InstCombine/printf-1.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Test that the printf library call simplifier works correctly.
;
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
; RUN: opt < %s -mtriple xcore-xmos-elf -passes=instcombine -S | FileCheck %s -check-prefix=CHECK-IPRINTF

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"

@hello_world = constant [13 x i8] c"hello world\0A\00"
@h = constant [2 x i8] c"h\00"
@h2 = constant [3 x i8] c"%%\00"
@percent = constant [2 x i8] c"%\00"
@percent_c = constant [3 x i8] c"%c\00"
@percent_d = constant [3 x i8] c"%d\00"
@percent_f = constant [3 x i8] c"%f\00"
@percent_s = constant [4 x i8] c"%s\0A\00"
@empty = constant [1 x i8] c"\00"

declare i32 @printf(ptr, ...)

; Check printf("") -> noop.

define void @test_simplify1() {
; CHECK-LABEL: @test_simplify1(
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_simplify1(
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @empty)
  ret void
}

; Check printf("x") -> putchar('x'), even for '%'.

define void @test_simplify2() {
; CHECK-LABEL: @test_simplify2(
; CHECK-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 104)
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_simplify2(
; CHECK-IPRINTF-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 104)
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @h)
  ret void
}

; Special case: printf("%%") -> putchar('%').

define void @test_simplify2b() {
; CHECK-LABEL: @test_simplify2b(
; CHECK-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 37)
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_simplify2b(
; CHECK-IPRINTF-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 37)
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @h2)
  ret void
}

define void @test_simplify3() {
; CHECK-LABEL: @test_simplify3(
; CHECK-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 37)
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_simplify3(
; CHECK-IPRINTF-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 37)
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @percent)
  ret void
}

; Check printf("foo\n") -> puts("foo").

define void @test_simplify4() {
; CHECK-LABEL: @test_simplify4(
; CHECK-NEXT:    [[PUTS:%.*]] = call i32 @puts(ptr nonnull dereferenceable(1) @str)
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_simplify4(
; CHECK-IPRINTF-NEXT:    [[PUTS:%.*]] = call i32 @puts(ptr nonnull dereferenceable(1) @str)
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @hello_world)
  ret void
}

; Check printf("%c", chr) -> putchar(chr).

define void @test_simplify5() {
; CHECK-LABEL: @test_simplify5(
; CHECK-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 104)
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_simplify5(
; CHECK-IPRINTF-NEXT:    [[PUTCHAR:%.*]] = call i32 @putchar(i32 104)
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @percent_c, i8 104)
  ret void
}

; Check printf("%s\n", str) -> puts(str).

define void @test_simplify6() {
; CHECK-LABEL: @test_simplify6(
; CHECK-NEXT:    [[PUTS:%.*]] = call i32 @puts(ptr nonnull dereferenceable(1) @hello_world)
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_simplify6(
; CHECK-IPRINTF-NEXT:    [[PUTS:%.*]] = call i32 @puts(ptr nonnull dereferenceable(1) @hello_world)
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @percent_s, ptr @hello_world)
  ret void
}

; Check printf(format, ...) -> iprintf(format, ...) if no floating point.

define void @test_simplify7() {
; CHECK-LABEL: @test_simplify7(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @percent_d, i32 187)
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_simplify7(
; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @iprintf(ptr noundef nonnull dereferenceable(1) @percent_d, i32 187)
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @percent_d, i32 187)
  ret void
}

define void @test_no_simplify1() {
; CHECK-LABEL: @test_no_simplify1(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @percent_f, double 1.870000e+00)
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_no_simplify1(
; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @percent_f, double 1.870000e+00)
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr @percent_f, double 1.87)
  ret void
}

define void @test_no_simplify2(ptr %fmt, double %d) {
; CHECK-LABEL: @test_no_simplify2(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) [[FMT:%.*]], double [[D:%.*]])
; CHECK-NEXT:    ret void
;
; CHECK-IPRINTF-LABEL: @test_no_simplify2(
; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) [[FMT:%.*]], double [[D:%.*]])
; CHECK-IPRINTF-NEXT:    ret void
;
  call i32 (ptr, ...) @printf(ptr %fmt, double %d)
  ret void
}

define i32 @test_no_simplify3() {
; CHECK-LABEL: @test_no_simplify3(
; CHECK-NEXT:    [[RET:%.*]] = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @h)
; CHECK-NEXT:    ret i32 [[RET]]
;
; CHECK-IPRINTF-LABEL: @test_no_simplify3(
; CHECK-IPRINTF-NEXT:    [[RET:%.*]] = call i32 (ptr, ...) @iprintf(ptr noundef nonnull dereferenceable(1) @h)
; CHECK-IPRINTF-NEXT:    ret i32 [[RET]]
;
  %ret = call i32 (ptr, ...) @printf(ptr @h)
  ret i32 %ret
}