108 lines
3.7 KiB
LLVM
108 lines
3.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -S -passes=instcombine,simplifycfg < %s 2>&1 | FileCheck %s
|
|
|
|
declare void @llvm.assume(i1 noundef)
|
|
|
|
define void @f1(i8* %a) {
|
|
; CHECK-LABEL: @f1(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[PTR:%.*]] = getelementptr inbounds i8, i8* [[A:%.*]], i64 4
|
|
; CHECK-NEXT: [[TMP0:%.*]] = ptrtoint i8* [[PTR]] to i64
|
|
; CHECK-NEXT: [[TMP1:%.*]] = and i64 [[TMP0]], 3
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[TMP1]], 0
|
|
; CHECK-NEXT: br i1 [[TMP2]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
|
|
; CHECK: if.then:
|
|
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i8* [[PTR]], i64 4) ]
|
|
; CHECK-NEXT: [[TMP3:%.*]] = bitcast i8* [[PTR]] to i32*
|
|
; CHECK-NEXT: store i32 4, i32* [[TMP3]], align 4
|
|
; CHECK-NEXT: br label [[IF_END]]
|
|
; CHECK: if.end:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
%ptr = getelementptr inbounds i8, i8* %a, i64 4
|
|
%0 = ptrtoint i8* %ptr to i64
|
|
%1 = and i64 %0, 3
|
|
%2 = icmp eq i64 %1, 0
|
|
br i1 %2, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry
|
|
call void @llvm.assume(i1 true) [ "align"(i8* %ptr, i64 4) ]
|
|
%3 = ptrtoint i8* %ptr to i64
|
|
%4 = and i64 %3, 3
|
|
%5 = icmp eq i64 %4, 0
|
|
br i1 %5, label %if.then1, label %if.else1
|
|
|
|
if.then1: ; preds = %if.then
|
|
%6 = bitcast i8* %ptr to i32*
|
|
store i32 4, i32* %6, align 4
|
|
br label %if.end
|
|
|
|
if.else1: ; preds = %if.then
|
|
store i8 1, i8* %ptr, align 1
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.then1, %if.else1, %entry
|
|
ret void
|
|
}
|
|
|
|
; TODO: We could fold away the branch "br i1 %3, ..." by either using a GEP or make getKnowledgeValidInContext aware the alignment bundle offset, and the improvement of value tracking of GEP.
|
|
|
|
define void @f2(i8* %a) {
|
|
; CHECK-LABEL: @f2(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i8* [[A:%.*]], i64 32, i32 24) ]
|
|
; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds i8, i8* [[A]], i64 8
|
|
; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint i8* [[TMP0]] to i64
|
|
; CHECK-NEXT: [[TMP2:%.*]] = and i64 [[TMP1]], 8
|
|
; CHECK-NEXT: [[TMP3:%.*]] = icmp eq i64 [[TMP2]], 0
|
|
; CHECK-NEXT: br i1 [[TMP3]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
|
|
; CHECK: if.then:
|
|
; CHECK-NEXT: [[TMP4:%.*]] = bitcast i8* [[TMP0]] to i64*
|
|
; CHECK-NEXT: store i64 16, i64* [[TMP4]], align 8
|
|
; CHECK-NEXT: br label [[IF_END:%.*]]
|
|
; CHECK: if.else:
|
|
; CHECK-NEXT: store i8 1, i8* [[TMP0]], align 8
|
|
; CHECK-NEXT: br label [[IF_END]]
|
|
; CHECK: if.end:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
call void @llvm.assume(i1 true) [ "align"(i8* %a, i64 32, i32 24) ]
|
|
%0 = getelementptr inbounds i8, i8* %a, i64 8
|
|
%1 = ptrtoint i8* %0 to i64
|
|
%2 = and i64 %1, 15
|
|
%3 = icmp eq i64 %2, 0
|
|
br i1 %3, label %if.then, label %if.else
|
|
|
|
if.then: ; preds = %entry
|
|
%4 = bitcast i8* %0 to i64*
|
|
store i64 16, i64* %4, align 4
|
|
br label %if.end
|
|
|
|
if.else: ; preds = %entry
|
|
store i8 1, i8* %0, align 1
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.else, %if.then
|
|
ret void
|
|
}
|
|
|
|
define void @f3(i64 %a, i8* %b) {
|
|
; CHECK-LABEL: @f3(
|
|
; CHECK-NEXT: [[C:%.*]] = ptrtoint i8* [[B:%.*]] to i64
|
|
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i8* [[B]], i64 4294967296) ]
|
|
; CHECK-NEXT: [[D:%.*]] = add i64 [[C]], [[A:%.*]]
|
|
; CHECK-NEXT: call void @g(i64 [[D]])
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
%c = ptrtoint i8* %b to i64
|
|
call void @llvm.assume(i1 true) [ "align"(i8* %b, i64 4294967296) ]
|
|
%d = add i64 %a, %c
|
|
call void @g(i64 %d)
|
|
ret void
|
|
}
|
|
|
|
declare void @g(i64)
|
|
|