642e9225c6
Instcombine will convert the nonnull and alignment assumption that use the boolean condtion to an assumption that uses the operand bundles when knowledge retention is enabled. Differential Revision: https://reviews.llvm.org/D82703
162 lines
4.9 KiB
LLVM
162 lines
4.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -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 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(i32* readonly %0) {
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "nonnull"(i32* [[TMP0:%.*]]) ]
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
call void @llvm.assume(i1 true) ["nonnull"(i32* %0)]
|
|
%2 = icmp eq i32* %0, null
|
|
ret i1 %2
|
|
}
|
|
|
|
define dso_local i1 @test2(i32* readonly %0) {
|
|
; CHECK-LABEL: @test2(
|
|
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "nonnull"(i32* [[TMP0:%.*]]) ]
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%2 = icmp eq i32* %0, null
|
|
call void @llvm.assume(i1 true) ["nonnull"(i32* %0)]
|
|
ret i1 %2
|
|
}
|
|
|
|
define dso_local i32 @test4(i32* readonly %0, i1 %cond) {
|
|
; CHECK-LABEL: @test4(
|
|
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[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, i32* [[TMP0]], align 4
|
|
; CHECK-NEXT: br label [[TMP4]]
|
|
; CHECK: 4:
|
|
; CHECK-NEXT: [[TMP5:%.*]] = phi i32 [ [[TMP3]], [[TMP2]] ], [ 0, [[A]] ]
|
|
; CHECK-NEXT: ret i32 [[TMP5]]
|
|
;
|
|
call void @llvm.assume(i1 true) ["dereferenceable"(i32* %0, i32 4)]
|
|
br i1 %cond, label %A, label %B
|
|
|
|
B:
|
|
br label %A
|
|
|
|
A:
|
|
%2 = icmp eq i32* %0, null
|
|
br i1 %2, label %5, label %3
|
|
|
|
3: ; preds = %1
|
|
%4 = load i32, i32* %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(i32* readonly %0, i1 %cond) {
|
|
; CHECK-LABEL: @test4a(
|
|
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[TMP0:%.*]], i32 4), "align"(i32* [[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, i32* [[TMP0]], align 8
|
|
; CHECK-NEXT: br label [[TMP4]]
|
|
; CHECK: 4:
|
|
; CHECK-NEXT: [[TMP5:%.*]] = phi i32 [ [[TMP3]], [[TMP2]] ], [ 0, [[A]] ]
|
|
; CHECK-NEXT: ret i32 [[TMP5]]
|
|
;
|
|
call void @llvm.assume(i1 true) ["dereferenceable"(i32* %0, i32 4), "align"(i32* %0, i32 8)]
|
|
br i1 %cond, label %A, label %B
|
|
|
|
B:
|
|
br label %A
|
|
|
|
A:
|
|
%2 = icmp eq i32* %0, null
|
|
br i1 %2, label %5, label %3
|
|
|
|
3: ; preds = %1
|
|
%4 = load i32, i32* %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(i32* readonly %0, i1 %cond) null_pointer_is_valid {
|
|
; CHECK-LABEL: @test4b(
|
|
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[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 i32* [[TMP0]], null
|
|
; CHECK-NEXT: br i1 [[TMP2]], label [[TMP5:%.*]], label [[TMP3:%.*]]
|
|
; CHECK: 3:
|
|
; CHECK-NEXT: [[TMP4:%.*]] = load i32, i32* [[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"(i32* %0, i32 4)]
|
|
br i1 %cond, label %A, label %B
|
|
|
|
B:
|
|
br label %A
|
|
|
|
A:
|
|
%2 = icmp eq i32* %0, null
|
|
br i1 %2, label %5, label %3
|
|
|
|
3: ; preds = %1
|
|
%4 = load i32, i32* %0, align 4
|
|
br label %5
|
|
|
|
5: ; preds = %1, %3
|
|
%6 = phi i32 [ %4, %3 ], [ 0, %A ]
|
|
ret i32 %6
|
|
}
|