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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
define i32 @assume_add(i32 %a, i32 %b) {
; CHECK-LABEL: @assume_add(
; CHECK-NEXT: [[T1:%.*]] = add i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[LAST_TWO_DIGITS:%.*]] = and i32 [[T1]], 3
; CHECK-NEXT: [[T2:%.*]] = icmp eq i32 [[LAST_TWO_DIGITS]], 0
; CHECK-NEXT: call void @llvm.assume(i1 [[T2]])
; CHECK-NEXT: [[T3:%.*]] = or disjoint i32 [[T1]], 3
; CHECK-NEXT: ret i32 [[T3]]
;
%t1 = add i32 %a, %b
%last_two_digits = and i32 %t1, 3
%t2 = icmp eq i32 %last_two_digits, 0
call void @llvm.assume(i1 %t2)
%t3 = add i32 %t1, 3
ret i32 %t3
}
define void @assume_not() {
; CHECK-LABEL: @assume_not(
; CHECK-NEXT: entry-block:
; CHECK-NEXT: [[TMP0:%.*]] = call i1 @get_val()
; CHECK-NEXT: [[TMP1:%.*]] = xor i1 [[TMP0]], true
; CHECK-NEXT: call void @llvm.assume(i1 [[TMP1]])
; CHECK-NEXT: ret void
;
entry-block:
%0 = call i1 @get_val()
%1 = xor i1 %0, true
call void @llvm.assume(i1 %1)
ret void
}
declare i1 @get_val()
declare void @llvm.assume(i1)
define dso_local i1 @test1(ptr readonly %0) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "nonnull"(ptr [[TMP0:%.*]]) ]
; CHECK-NEXT: ret i1 false
;
call void @llvm.assume(i1 true) ["nonnull"(ptr %0)]
%2 = icmp eq ptr %0, null
ret i1 %2
}
define dso_local i1 @test2(ptr readonly %0) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "nonnull"(ptr [[TMP0:%.*]]) ]
; CHECK-NEXT: ret i1 false
;
%2 = icmp eq ptr %0, null
call void @llvm.assume(i1 true) ["nonnull"(ptr %0)]
ret i1 %2
}
define dso_local i32 @test4(ptr readonly %0, i1 %cond) nofree nosync {
; CHECK-LABEL: @test4(
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[TMP0:%.*]], i32 4) ]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: B:
; CHECK-NEXT: br label [[A]]
; CHECK: A:
; CHECK-NEXT: br i1 false, label [[TMP4:%.*]], label [[TMP2:%.*]]
; CHECK: 2:
; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP0]], align 4
; CHECK-NEXT: br label [[TMP4]]
; CHECK: 4:
; CHECK-NEXT: [[TMP5:%.*]] = phi i32 [ [[TMP3]], [[TMP2]] ], [ poison, [[A]] ]
; CHECK-NEXT: ret i32 [[TMP5]]
;
call void @llvm.assume(i1 true) ["dereferenceable"(ptr %0, i32 4)]
br i1 %cond, label %A, label %B
B:
br label %A
A:
%2 = icmp eq ptr %0, null
br i1 %2, label %5, label %3
3: ; preds = %1
%4 = load i32, ptr %0, align 4
br label %5
5: ; preds = %1, %3
%6 = phi i32 [ %4, %3 ], [ 0, %A ]
ret i32 %6
}
define dso_local i32 @test4a(ptr readonly %0, i1 %cond) nofree nosync {
; CHECK-LABEL: @test4a(
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[TMP0:%.*]], i32 4), "align"(ptr [[TMP0]], i32 8) ]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: B:
; CHECK-NEXT: br label [[A]]
; CHECK: A:
; CHECK-NEXT: br i1 false, label [[TMP4:%.*]], label [[TMP2:%.*]]
; CHECK: 2:
; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP0]], align 4
; CHECK-NEXT: br label [[TMP4]]
; CHECK: 4:
; CHECK-NEXT: [[TMP5:%.*]] = phi i32 [ [[TMP3]], [[TMP2]] ], [ poison, [[A]] ]
; CHECK-NEXT: ret i32 [[TMP5]]
;
call void @llvm.assume(i1 true) ["dereferenceable"(ptr %0, i32 4), "align"(ptr %0, i32 8)]
br i1 %cond, label %A, label %B
B:
br label %A
A:
%2 = icmp eq ptr %0, null
br i1 %2, label %5, label %3
3: ; preds = %1
%4 = load i32, ptr %0, align 4
br label %5
5: ; preds = %1, %3
%6 = phi i32 [ %4, %3 ], [ 0, %A ]
ret i32 %6
}
define dso_local i32 @test4b(ptr readonly %0, i1 %cond) null_pointer_is_valid {
; CHECK-LABEL: @test4b(
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[TMP0:%.*]], i32 4) ]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: B:
; CHECK-NEXT: br label [[A]]
; CHECK: A:
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq ptr [[TMP0]], null
; CHECK-NEXT: br i1 [[TMP2]], label [[TMP5:%.*]], label [[TMP3:%.*]]
; CHECK: 3:
; CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[TMP0]], align 4
; CHECK-NEXT: br label [[TMP5]]
; CHECK: 5:
; CHECK-NEXT: [[TMP6:%.*]] = phi i32 [ [[TMP4]], [[TMP3]] ], [ 0, [[A]] ]
; CHECK-NEXT: ret i32 [[TMP6]]
;
call void @llvm.assume(i1 true) ["dereferenceable"(ptr %0, i32 4)]
br i1 %cond, label %A, label %B
B:
br label %A
A:
%2 = icmp eq ptr %0, null
br i1 %2, label %5, label %3
3: ; preds = %1
%4 = load i32, ptr %0, align 4
br label %5
5: ; preds = %1, %3
%6 = phi i32 [ %4, %3 ], [ 0, %A ]
ret i32 %6
}
define i1 @test_dereferenceable_unknown_size_not_nonnull(ptr %ptr, i32 %bytes) {
; CHECK-LABEL: @test_dereferenceable_unknown_size_not_nonnull(
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[TMP0:%.*]], i32 [[BYTES:%.*]]) ]
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq ptr [[TMP0]], null
; CHECK-NEXT: ret i1 [[TMP2]]
;
call void @llvm.assume(i1 true) ["dereferenceable"(ptr %ptr, i32 %bytes)]
%2 = icmp eq ptr %ptr, null
ret i1 %2
}
define i1 @test_dereferenceable_zero_size_not_nonnull(ptr %ptr) {
; CHECK-LABEL: @test_dereferenceable_zero_size_not_nonnull(
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[TMP0:%.*]], i32 0) ]
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq ptr [[TMP0]], null
; CHECK-NEXT: ret i1 [[TMP2]]
;
call void @llvm.assume(i1 true) ["dereferenceable"(ptr %ptr, i32 0)]
%2 = icmp eq ptr %ptr, null
ret i1 %2
}
define i1 @test_dereferenceable_non_zero_size_is_nonnull(ptr %ptr) {
; CHECK-LABEL: @test_dereferenceable_non_zero_size_is_nonnull(
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[TMP0:%.*]], i32 1) ]
; CHECK-NEXT: ret i1 false
;
call void @llvm.assume(i1 true) ["dereferenceable"(ptr %ptr, i32 1)]
%2 = icmp eq ptr %ptr, null
ret i1 %2
}
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