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llvm-mirror/test/Transforms/InstCombine/assume-align.ll

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reland [InstCombine] convert assumes to operand bundles 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
2021-02-09 19:20:50 +01:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg' There was an alias between 'simplifycfg' and 'simplify-cfg' in the PassRegistry. That was the original reason for this patch, which effectively removes the alias. This patch also replaces all occurrances of 'simplify-cfg' by 'simplifycfg'. Reason for choosing that form for the name is that it matches the DEBUG_TYPE for the pass, and the legacy PM name and also how it is spelled out in other passes such as 'loop-simplifycfg', and in other options such as 'simplifycfg-merge-cond-stores'. I for some reason the name should be changed to 'simplify-cfg' in the future, then I think such a renaming should be more widely done and not only impacting the PassRegistry. Reviewed By: aeubanks Differential Revision: https://reviews.llvm.org/D105627
2021-07-08 14:24:03 +02:00
; RUN: opt -S -passes=instcombine,simplifycfg < %s 2>&1 | FileCheck %s
[ValueTracking] Add tracking of the alignment assume bundle This patch is to add the support of the value tracking of the alignment assume bundle. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D88669
2020-10-27 10:49:41 +01:00
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:
Revert "[InstCombine] convert assumes to operand bundles" This reverts commit 5eb2e994f9b3a5aff0a156d0a1f7e6121342cc11.
2021-02-10 01:32:00 +01:00
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i8* [[PTR]], i64 4) ]
[ValueTracking] Add tracking of the alignment assume bundle This patch is to add the support of the value tracking of the alignment assume bundle. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D88669
2020-10-27 10:49:41 +01:00
; 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
}
reland [InstCombine] convert assumes to operand bundles 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
2021-02-09 19:20:50 +01:00
; 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.
[ValueTracking] Add tracking of the alignment assume bundle This patch is to add the support of the value tracking of the alignment assume bundle. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D88669
2020-10-27 10:49:41 +01:00
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
reland [InstCombine] convert assumes to operand bundles 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
2021-02-09 19:20:50 +01:00
; 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
[ValueTracking] Add tracking of the alignment assume bundle This patch is to add the support of the value tracking of the alignment assume bundle. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D88669
2020-10-27 10:49:41 +01:00
;
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
}
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