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llvm-mirror/test/Transforms/SimplifyCFG/preserve-store-alignment.ll
Alexey Bataev eaced7f8cb [SimplifyCFG] Fix for PR34219: Preserve alignment after merging conditional stores. 
Summary:
If SimplifyCFG pass is able to merge conditional stores into single one,
it loses the alignment. This may lead to incorrect codegen. Patch
sets the alignment of the new instruction if it is set in the original
one.

Reviewers: jmolloy

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D36841

llvm-svn: 312030
2017-08-29 20:06:24 +00:00

268 lines
15 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -simplifycfg -S < %s | FileCheck %s
%struct.Counters = type { i64, i64, i64, [8 x i8] }
@m = global i64 3, align 8
@counters = global %struct.Counters zeroinitializer, align 16
define i32 @align_both_equal() local_unnamed_addr {
; CHECK-LABEL: @align_both_equal(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP1:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 1, i64 1>
; CHECK-NEXT: store <2 x i64> [[TMP1]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP2:%.*]] = load i64, i64* @m, align 8
; CHECK-NEXT: [[AND:%.*]] = and i64 [[TMP2]], 1
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i64 [[AND]], 0
; CHECK-NEXT: [[TMP3:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TOBOOL]], <2 x i64> [[TMP1]], <2 x i64> [[TMP3]]
; CHECK-NEXT: [[AND4:%.*]] = and i64 [[TMP2]], 2
; CHECK-NEXT: [[TOBOOL5:%.*]] = icmp eq i64 [[AND4]], 0
; CHECK-NEXT: [[TMP5:%.*]] = add nsw <2 x i64> [[TMP4]], <i64 1, i64 1>
; CHECK-NEXT: [[DOT:%.*]] = select i1 [[TOBOOL5]], <2 x i64> [[TMP4]], <2 x i64> [[TMP5]]
; CHECK-NEXT: [[TMP6:%.*]] = xor i1 [[TOBOOL]], true
; CHECK-NEXT: [[TMP7:%.*]] = xor i1 [[TOBOOL5]], true
; CHECK-NEXT: [[TMP8:%.*]] = or i1 [[TMP6]], [[TMP7]]
; CHECK-NEXT: br i1 [[TMP8]], label [[TMP9:%.*]], label [[TMP10:%.*]]
; CHECK: store <2 x i64> [[DOT]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: br label [[TMP10]]
; CHECK: ret i32 0
;
entry:
%0 = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%1 = add nsw <2 x i64> %0, <i64 1, i64 1>
store <2 x i64> %1, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%2 = load i64, i64* @m, align 8
%and = and i64 %2, 1
%tobool = icmp eq i64 %and, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%3 = add nsw <2 x i64> %0, <i64 2, i64 2>
store <2 x i64> %3, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
br label %if.end
if.end: ; preds = %entry, %if.then
%4 = phi <2 x i64> [ %1, %entry ], [ %3, %if.then ]
%and4 = and i64 %2, 2
%tobool5 = icmp eq i64 %and4, 0
br i1 %tobool5, label %if.end9, label %if.then6
if.then6: ; preds = %if.end
%5 = add nsw <2 x i64> %4, <i64 1, i64 1>
store <2 x i64> %5, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
br label %if.end9
if.end9: ; preds = %if.end, %if.then6
ret i32 0
}
define i32 @align_not_equal() local_unnamed_addr {
; CHECK-LABEL: @align_not_equal(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP1:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 1, i64 1>
; CHECK-NEXT: store <2 x i64> [[TMP1]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP2:%.*]] = load i64, i64* @m, align 8
; CHECK-NEXT: [[AND:%.*]] = and i64 [[TMP2]], 1
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i64 [[AND]], 0
; CHECK-NEXT: [[TMP3:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TOBOOL]], <2 x i64> [[TMP1]], <2 x i64> [[TMP3]]
; CHECK-NEXT: [[AND4:%.*]] = and i64 [[TMP2]], 2
; CHECK-NEXT: [[TOBOOL5:%.*]] = icmp eq i64 [[AND4]], 0
; CHECK-NEXT: [[TMP5:%.*]] = add nsw <2 x i64> [[TMP4]], <i64 1, i64 1>
; CHECK-NEXT: [[DOT:%.*]] = select i1 [[TOBOOL5]], <2 x i64> [[TMP4]], <2 x i64> [[TMP5]]
; CHECK-NEXT: [[TMP6:%.*]] = xor i1 [[TOBOOL]], true
; CHECK-NEXT: [[TMP7:%.*]] = xor i1 [[TOBOOL5]], true
; CHECK-NEXT: [[TMP8:%.*]] = or i1 [[TMP6]], [[TMP7]]
; CHECK-NEXT: br i1 [[TMP8]], label [[TMP9:%.*]], label [[TMP10:%.*]]
; CHECK: store <2 x i64> [[DOT]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: br label [[TMP10]]
; CHECK: ret i32 0
;
entry:
%0 = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%1 = add nsw <2 x i64> %0, <i64 1, i64 1>
store <2 x i64> %1, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%2 = load i64, i64* @m, align 8
%and = and i64 %2, 1
%tobool = icmp eq i64 %and, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%3 = add nsw <2 x i64> %0, <i64 2, i64 2>
store <2 x i64> %3, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 16
br label %if.end
if.end: ; preds = %entry, %if.then
%4 = phi <2 x i64> [ %1, %entry ], [ %3, %if.then ]
%and4 = and i64 %2, 2
%tobool5 = icmp eq i64 %and4, 0
br i1 %tobool5, label %if.end9, label %if.then6
if.then6: ; preds = %if.end
%5 = add nsw <2 x i64> %4, <i64 1, i64 1>
store <2 x i64> %5, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
br label %if.end9
if.end9: ; preds = %if.end, %if.then6
ret i32 0
}
define i32 @align_single_zero() local_unnamed_addr {
; CHECK-LABEL: @align_single_zero(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP1:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 1, i64 1>
; CHECK-NEXT: store <2 x i64> [[TMP1]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP2:%.*]] = load i64, i64* @m, align 8
; CHECK-NEXT: [[AND:%.*]] = and i64 [[TMP2]], 1
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i64 [[AND]], 0
; CHECK-NEXT: [[TMP3:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TOBOOL]], <2 x i64> [[TMP1]], <2 x i64> [[TMP3]]
; CHECK-NEXT: [[AND4:%.*]] = and i64 [[TMP2]], 2
; CHECK-NEXT: [[TOBOOL5:%.*]] = icmp eq i64 [[AND4]], 0
; CHECK-NEXT: [[TMP5:%.*]] = add nsw <2 x i64> [[TMP4]], <i64 1, i64 1>
; CHECK-NEXT: [[DOT:%.*]] = select i1 [[TOBOOL5]], <2 x i64> [[TMP4]], <2 x i64> [[TMP5]]
; CHECK-NEXT: [[TMP6:%.*]] = xor i1 [[TOBOOL]], true
; CHECK-NEXT: [[TMP7:%.*]] = xor i1 [[TOBOOL5]], true
; CHECK-NEXT: [[TMP8:%.*]] = or i1 [[TMP6]], [[TMP7]]
; CHECK-NEXT: br i1 [[TMP8]], label [[TMP9:%.*]], label [[TMP10:%.*]]
; CHECK: store <2 x i64> [[DOT]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: br label [[TMP10]]
; CHECK: ret i32 0
;
entry:
%0 = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%1 = add nsw <2 x i64> %0, <i64 1, i64 1>
store <2 x i64> %1, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%2 = load i64, i64* @m, align 8
%and = and i64 %2, 1
%tobool = icmp eq i64 %and, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%3 = add nsw <2 x i64> %0, <i64 2, i64 2>
store <2 x i64> %3, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*)
br label %if.end
if.end: ; preds = %entry, %if.then
%4 = phi <2 x i64> [ %1, %entry ], [ %3, %if.then ]
%and4 = and i64 %2, 2
%tobool5 = icmp eq i64 %and4, 0
br i1 %tobool5, label %if.end9, label %if.then6
if.then6: ; preds = %if.end
%5 = add nsw <2 x i64> %4, <i64 1, i64 1>
store <2 x i64> %5, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
br label %if.end9
if.end9: ; preds = %if.end, %if.then6
ret i32 0
}
define i32 @align_single_zero_second_greater_default() local_unnamed_addr {
; CHECK-LABEL: @align_single_zero_second_greater_default(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP1:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 1, i64 1>
; CHECK-NEXT: store <2 x i64> [[TMP1]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP2:%.*]] = load i64, i64* @m, align 8
; CHECK-NEXT: [[AND:%.*]] = and i64 [[TMP2]], 1
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i64 [[AND]], 0
; CHECK-NEXT: [[TMP3:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TOBOOL]], <2 x i64> [[TMP1]], <2 x i64> [[TMP3]]
; CHECK-NEXT: [[AND4:%.*]] = and i64 [[TMP2]], 2
; CHECK-NEXT: [[TOBOOL5:%.*]] = icmp eq i64 [[AND4]], 0
; CHECK-NEXT: [[TMP5:%.*]] = add nsw <2 x i64> [[TMP4]], <i64 1, i64 1>
; CHECK-NEXT: [[DOT:%.*]] = select i1 [[TOBOOL5]], <2 x i64> [[TMP4]], <2 x i64> [[TMP5]]
; CHECK-NEXT: [[TMP6:%.*]] = xor i1 [[TOBOOL]], true
; CHECK-NEXT: [[TMP7:%.*]] = xor i1 [[TOBOOL5]], true
; CHECK-NEXT: [[TMP8:%.*]] = or i1 [[TMP6]], [[TMP7]]
; CHECK-NEXT: br i1 [[TMP8]], label [[TMP9:%.*]], label [[TMP10:%.*]]
; CHECK: store <2 x i64> [[DOT]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 16
; CHECK-NEXT: br label [[TMP10]]
; CHECK: ret i32 0
;
entry:
%0 = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%1 = add nsw <2 x i64> %0, <i64 1, i64 1>
store <2 x i64> %1, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%2 = load i64, i64* @m, align 8
%and = and i64 %2, 1
%tobool = icmp eq i64 %and, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%3 = add nsw <2 x i64> %0, <i64 2, i64 2>
store <2 x i64> %3, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 32
br label %if.end
if.end: ; preds = %entry, %if.then
%4 = phi <2 x i64> [ %1, %entry ], [ %3, %if.then ]
%and4 = and i64 %2, 2
%tobool5 = icmp eq i64 %and4, 0
br i1 %tobool5, label %if.end9, label %if.then6
if.then6: ; preds = %if.end
%5 = add nsw <2 x i64> %4, <i64 1, i64 1>
store <2 x i64> %5, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*)
br label %if.end9
if.end9: ; preds = %if.end, %if.then6
ret i32 0
}
define i32 @align_both_zero() local_unnamed_addr {
; CHECK-LABEL: @align_both_zero(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP1:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 1, i64 1>
; CHECK-NEXT: store <2 x i64> [[TMP1]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
; CHECK-NEXT: [[TMP2:%.*]] = load i64, i64* @m, align 8
; CHECK-NEXT: [[AND:%.*]] = and i64 [[TMP2]], 1
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i64 [[AND]], 0
; CHECK-NEXT: [[TMP3:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TOBOOL]], <2 x i64> [[TMP1]], <2 x i64> [[TMP3]]
; CHECK-NEXT: [[AND4:%.*]] = and i64 [[TMP2]], 2
; CHECK-NEXT: [[TOBOOL5:%.*]] = icmp eq i64 [[AND4]], 0
; CHECK-NEXT: [[TMP5:%.*]] = add nsw <2 x i64> [[TMP4]], <i64 1, i64 1>
; CHECK-NEXT: [[DOT:%.*]] = select i1 [[TOBOOL5]], <2 x i64> [[TMP4]], <2 x i64> [[TMP5]]
; CHECK-NEXT: [[TMP6:%.*]] = xor i1 [[TOBOOL]], true
; CHECK-NEXT: [[TMP7:%.*]] = xor i1 [[TOBOOL5]], true
; CHECK-NEXT: [[TMP8:%.*]] = or i1 [[TMP6]], [[TMP7]]
; CHECK-NEXT: br i1 [[TMP8]], label [[TMP9:%.*]], label [[TMP10:%.*]]
; CHECK: store <2 x i64> [[DOT]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 16
; CHECK-NEXT: br label [[TMP10]]
; CHECK: ret i32 0
;
entry:
%0 = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%1 = add nsw <2 x i64> %0, <i64 1, i64 1>
store <2 x i64> %1, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
%2 = load i64, i64* @m, align 8
%and = and i64 %2, 1
%tobool = icmp eq i64 %and, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%3 = add nsw <2 x i64> %0, <i64 2, i64 2>
store <2 x i64> %3, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*)
br label %if.end
if.end: ; preds = %entry, %if.then
%4 = phi <2 x i64> [ %1, %entry ], [ %3, %if.then ]
%and4 = and i64 %2, 2
%tobool5 = icmp eq i64 %and4, 0
br i1 %tobool5, label %if.end9, label %if.then6
if.then6: ; preds = %if.end
%5 = add nsw <2 x i64> %4, <i64 1, i64 1>
store <2 x i64> %5, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*)
br label %if.end9
if.end9: ; preds = %if.end, %if.then6
ret i32 0
}
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