equivalent-phi.ll
2.96 KB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
@global = common global [1024 x i32] zeroinitializer, align 16
;; We should be able to prove the equivalence of two of the phis, and then use that to eliminate
;; one set of indexing calculations and a load
; Function Attrs: nounwind ssp uwtable
define i32 @bar(i32 %arg, i32 %arg1, i32 %arg2) #0 {
; CHECK-LABEL: @bar(
; CHECK-NEXT: bb:
; CHECK-NEXT: br label %bb3
; CHECK: bb3:
; CHECK-NEXT: [[TMP:%.*]] = phi i32 [ %arg, %bb ], [ [[TMP:%.*]]15, %bb17 ]
; CHECK-NEXT: [[TMP4:%.*]] = phi i32 [ %arg2, %bb ], [ [[TMP18:%.*]], %bb17 ]
; CHECK-NEXT: [[TMP6:%.*]] = phi i32 [ 0, %bb ], [ [[TMP14:%.*]], %bb17 ]
; CHECK-NEXT: [[TMP7:%.*]] = sext i32 [[TMP]] to i64
; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds [1024 x i32], [1024 x i32]* @global, i64 0, i64 [[TMP7]]
; CHECK-NEXT: [[TMP9:%.*]] = load i32, i32* [[TMP8]], align 4
; CHECK-NEXT: [[TMP10:%.*]] = add nsw i32 [[TMP6]], [[TMP9]]
; CHECK-NEXT: [[TMP14]] = add nsw i32 [[TMP10]], [[TMP9]]
; CHECK-NEXT: [[TMP15:%.*]] = add nsw i32 [[TMP]], %arg1
; CHECK-NEXT: br label %bb17
; CHECK: bb17:
; CHECK-NEXT: [[TMP18]] = add i32 [[TMP4]], -1
; CHECK-NEXT: [[TMP19:%.*]] = icmp ne i32 [[TMP4]], 0
; CHECK-NEXT: br i1 [[TMP19]], label %bb3, label %bb20
; CHECK: bb20:
; CHECK-NEXT: ret i32 [[TMP14]]
;
bb:
br label %bb3
bb3: ; preds = %bb17, %bb
%tmp = phi i32 [ %arg, %bb ], [ %tmp15, %bb17 ]
%tmp4 = phi i32 [ %arg2, %bb ], [ %tmp18, %bb17 ]
%tmp5 = phi i32 [ %arg, %bb ], [ %tmp16, %bb17 ]
%tmp6 = phi i32 [ 0, %bb ], [ %tmp14, %bb17 ]
%tmp7 = sext i32 %tmp to i64
%tmp8 = getelementptr inbounds [1024 x i32], [1024 x i32]* @global, i64 0, i64 %tmp7
%tmp9 = load i32, i32* %tmp8, align 4
%tmp10 = add nsw i32 %tmp6, %tmp9
%tmp11 = sext i32 %tmp5 to i64
%tmp12 = getelementptr inbounds [1024 x i32], [1024 x i32]* @global, i64 0, i64 %tmp11
%tmp13 = load i32, i32* %tmp12, align 4
%tmp14 = add nsw i32 %tmp10, %tmp13
%tmp15 = add nsw i32 %tmp, %arg1
%tmp16 = add nsw i32 %tmp5, %arg1
br label %bb17
bb17: ; preds = %bb3
%tmp18 = add i32 %tmp4, -1
%tmp19 = icmp ne i32 %tmp4, 0
br i1 %tmp19, label %bb3, label %bb20
bb20: ; preds = %bb17
ret i32 %tmp14
}
attributes #0 = { nounwind ssp uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+sse4.1,+ssse3" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"PIC Level", i32 2}
!1 = !{!"Apple LLVM version 8.0.0 (clang-800.0.42.1)"}