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[Test] Add test with uadd intrinsic with missing opt opportunity

This commit is contained in:
Max Kazantsev 2021-02-12 17:38:07 +07:00
parent 2465541dc0
commit b6ccc7675d
1 changed files with 55 additions and 0 deletions
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55
llvm/test/CodeGen/X86/uadd_inc_iv.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -mtriple=x86_64-linux -codegenprepare -S < %s | FileCheck %s
declare { i64, i1 } @llvm.uadd.with.overflow.i64(i64, i64)
define i32 @test_01(i32* %p, i64 %len, i32 %x) {
; CHECK-LABEL: @test_01(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[MATH:%.*]], [[BACKEDGE:%.*]] ], [ [[LEN:%.*]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[TMP0:%.*]] = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 [[IV]], i64 1)
; CHECK-NEXT: [[MATH]] = extractvalue { i64, i1 } [[TMP0]], 0
; CHECK-NEXT: [[OV:%.*]] = extractvalue { i64, i1 } [[TMP0]], 1
; CHECK-NEXT: br i1 [[OV]], label [[EXIT:%.*]], label [[BACKEDGE]]
; CHECK: backedge:
; CHECK-NEXT: [[SUNKADDR:%.*]] = mul i64 [[IV]], 4
; CHECK-NEXT: [[TMP1:%.*]] = bitcast i32* [[P:%.*]] to i8*
; CHECK-NEXT: [[SUNKADDR1:%.*]] = getelementptr i8, i8* [[TMP1]], i64 [[SUNKADDR]]
; CHECK-NEXT: [[SUNKADDR2:%.*]] = getelementptr i8, i8* [[SUNKADDR1]], i64 4
; CHECK-NEXT: [[TMP2:%.*]] = bitcast i8* [[SUNKADDR2]] to i32*
; CHECK-NEXT: [[LOADED:%.*]] = load atomic i32, i32* [[TMP2]] unordered, align 4
; CHECK-NEXT: [[COND_2:%.*]] = icmp eq i32 [[LOADED]], [[X:%.*]]
; CHECK-NEXT: br i1 [[COND_2]], label [[FAILURE:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret i32 -1
; CHECK: failure:
; CHECK-NEXT: unreachable
;
entry:
br label %loop
loop: ; preds = %backedge, %entry
%iv = phi i64 [ %math, %backedge ], [ %len, %entry ]
%0 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %iv, i64 1)
%math = extractvalue { i64, i1 } %0, 0
%ov = extractvalue { i64, i1 } %0, 1
br i1 %ov, label %exit, label %backedge
backedge: ; preds = %loop
%sunkaddr = mul i64 %iv, 4
%1 = bitcast i32* %p to i8*
%sunkaddr1 = getelementptr i8, i8* %1, i64 %sunkaddr
%sunkaddr2 = getelementptr i8, i8* %sunkaddr1, i64 4
%2 = bitcast i8* %sunkaddr2 to i32*
%loaded = load atomic i32, i32* %2 unordered, align 4
%cond_2 = icmp eq i32 %loaded, %x
br i1 %cond_2, label %failure, label %loop
exit: ; preds = %loop
ret i32 -1
failure: ; preds = %backedge
unreachable
}